├── hw
    ├── Assignment 3
    │   ├── samim
    │   │   ├── footer.php
    │   │   ├── header.php
    │   │   └── index.php
    │   ├── shariar.php
    │   ├── Tiash(L.Y).php
    │   ├── kabbya.php
    │   ├── nurul.php
    │   └── momen.php
    ├── Assignment 2
    │   ├── samim
    │   │   ├── footer.php
    │   │   ├── header.php
    │   │   ├── index.php
    │   │   └── data.php
    │   ├── nurul.php
    │   ├── kabbya.php
    │   ├── shariar.php
    │   └── momen.php
    └── Assignment 1
    │   ├── mary.php
    │   ├── kabbo.php
    │   ├── shahriar.php
    │   ├── momen.php
    │   └── nurul.php
├── l9-connect-db.php
├── authentication
    ├── db.php
    ├── footer.php
    ├── index.php
    ├── login.php
    ├── header.php
    ├── navbar.php
    ├── l8-form-validation.php
    └── signup.php
├── l1-variable-echo-comment.php
├── l4-loop.php
├── l10-crud
    ├── delete.php
    ├── edit.php
    └── index.php
├── l2-operaor.php
├── l6-array2.php
├── others
    └── getUserInfo
    │   └── index.html
├── l5-array.php
├── l7-date-bf.php
├── l3-condition-function.php
└── l8-form-validation.php


/hw/Assignment 3/samim/footer.php:
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1 | 
2 | </body>
3 | </html>


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/hw/Assignment 2/samim/footer.php:
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1 |     
2 | </body>
3 | </html>


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/l9-connect-db.php:
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1 | <?php
2 |     $conn = mysqli_connect("localhost", "poot", "", "ia20");
3 | ?>


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/authentication/db.php:
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1 | <?php  
2 |     $conn = mysqli_connect("localhost", "root", "", "sms20ia");
3 | ?>


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/authentication/footer.php:
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1 | <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.3.2/dist/js/bootstrap.bundle.min.js" integrity="sha384-C6RzsynM9kWDrMNeT87bh95OGNyZPhcTNXj1NW7RuBCsyN/o0jlpcV8Qyq46cDfL" crossorigin="anonymous"></script>
2 | 
3 |   </body>
4 | </html>


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/hw/Assignment 1/mary.php:
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 1 | <?php
 2 | 
 3 | function number($x, $y)
 4 | {
 5 |   if (!is_int($x) || !is_int($y)) {
 6 |     return "Invalid number probvided <br>";
 7 |   }
 8 |   $m = $x + $y . "<br>";
 9 |   return "$m";
10 | }
11 | echo number(16546545, "Dhaka");
12 | echo number("3", 6);
13 | 


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/hw/Assignment 1/kabbo.php:
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 1 | <?php
 2 | 
 3 | declare(strict_types=1);
 4 | function number($a, $b)
 5 | {
 6 |     if (!is_int($a) || !is_int($b)) {
 7 |         return "Invalid number probvided <br>";
 8 |     }
 9 |     return $a + $b . "<br>";
10 | }
11 | 
12 | echo number(2, 2);
13 | echo number(2, "2");
14 | 


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/l1-variable-echo-comment.php:
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 1 | <?php
 2 | $x = "Hello World";
 3 | echo $x;
 4 | 
 5 | // 1 line comment
 6 | 
 7 | /* this
 8 | is 
 9 | a
10 | multiline comment
11 | */
12 | 
13 | # this is also a single line comment
14 | 
15 | /**
16 |  * this is
17 |  * also a
18 |  * multiline
19 |  * comment
20 |  */
21 | 


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/hw/Assignment 1/shahriar.php:
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 1 | <?php
 2 |     function Sum($num1, $num2) {
 3 |       
 4 |         if (!is_int($num1) || !is_int($num2)) {
 5 |             return "Error  Parameter should be a number.";
 6 |         } else{
 7 |             return $num1 + $num2;
 8 |             
 9 |         }
10 |     }
11 |     echo Sum(10, 45);
12 |     echo Sum(10, 45);
13 | ?>


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/hw/Assignment 1/momen.php:
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 1 | <?php
 2 | function sum($a, $b)
 3 | {
 4 | 
 5 |     if (is_int($a) && is_int($b)) {
 6 | 
 7 |         $sum = $a + $b;
 8 |         return $sum . "<br>";
 9 |     } else {
10 | 
11 |         $sum = "Please Enter Number Like (0 - 9)";
12 |         return $sum . "<br>";
13 |     }
14 | }
15 | 
16 | echo sum(1, 9);
17 | echo sum(1, "9");
18 | 


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/hw/Assignment 3/shariar.php:
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 1 | <?php
 2 | 
 3 | function lepaYear($year)
 4 | {
 5 |     if (!is_int($year)) {
 6 |         return "Error Parameter !! Input should be a number.";
 7 |     }
 8 |     //check  Leap Year
 9 |     if (($year % 4 === 0) && ($year % 100 != 0) || $year % 400 === 0) {
10 |         echo "$year is Leap Year";
11 |     } else {
12 |         return "Not Leap Year";
13 |     }
14 | }
15 | echo lepaYear(2021);
16 | 


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/hw/Assignment 3/Tiash(L.Y).php:
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 1 | <?php
 2 | 
 3 | function LeapYear($year)
 4 | {
 5 |     if (($year % 4 == 0 && $year % 100 != 0) || $year % 400 == 0) {
 6 |         return true;
 7 |     } else {
 8 |         return false;
 9 |     }
10 | }
11 | 
12 | $year = 1903; // Change this to the year you want to check
13 | if (LeapYear($year)) {
14 |     echo "$year is a leap year.";
15 | } else {
16 |     echo "$year is not a leap year.";
17 | }
18 | 


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/hw/Assignment 3/kabbya.php:
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 1 | <?php
 2 | function leap_year($x)
 3 | {
 4 |     if (!is_int($x)) {
 5 |         return "error: This is not a number.";
 6 |     } else {
 7 |         if ($x % 4 == 0 || $x % 100 == 0 || $x % 400 == 0) {
 8 |             return "$x is Leap Year.";
 9 |         } else {
10 |             return "$x is not Leap Year.";
11 |         }
12 |     }
13 | }
14 | 
15 | echo leap_year("year2");
16 | echo "<br>";
17 | echo leap_year(1900);
18 | 


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/authentication/index.php:
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 1 | <?php 
 2 |     include_once("./header.php");
 3 | ?>
 4 |     <div class="container fixed-top z-0">
 5 |         <div class="row min-vh-100 d-flex">
 6 |             <div class="col-12 m-auto text-center">
 7 |                 <h1>
 8 |                     Please Log-in to see the website!
 9 |                 </h1>
10 |             </div>
11 |         </div>
12 |     </div>
13 | <?php
14 |     include_once("./footer.php");
15 | ?>
16 |     


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/hw/Assignment 1/nurul.php:
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 1 | <?php  
 2 | 
 3 |     function Addnumbers ($a, $b) {
 4 |       
 5 |         if (!is_int($a) || !is_int($b)) {
 6 |             return "Error: Parameter should be a number.";
 7 |         }
 8 |             return $a + $b;
 9 |     
10 |     }
11 |     
12 |     echo Addnumbers (2000, 5000)."<br>";
13 |     echo Addnumbers ("10days","5days");
14 | 
15 | 
16 |  ?>
17 | 
18 | 
19 | 
20 | 
21 | 
22 | 
23 | 
24 | 
25 | 
26 | 
27 | 
28 | 
29 | 
30 | 
31 | 
32 | 
33 | 
34 | 
35 | 


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/hw/Assignment 2/samim/header.php:
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 1 | <!DOCTYPE html>
 2 | <html lang="en">
 3 | <head>
 4 |     <meta charset="UTF-8">
 5 |     <meta name="viewport" content="width=device-width, initial-scale=1.0">
 6 |     <title>Show all Countries name from array via PHP</title>
 7 |     <!-- Bootstrap css  -->
 8 |     <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.1/dist/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-4bw+/aepP/YC94hEpVNVgiZdgIC5+VKNBQNGCHeKRQN+PtmoHDEXuppvnDJzQIu9" crossorigin="anonymous">
 9 | 
10 | </head>
11 | <body class="bg-dark">
12 | 


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/hw/Assignment 3/nurul.php:
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 1 | <?php
 2 | function lepaYear($year)
 3 | {
 4 |     if (!is_int($year)) {
 5 |         return " Input should be a number.";
 6 |     } elseif ($year % 4 === 0) {
 7 |         if ($year % 100 === 0) {
 8 |             if ($year % 400 === 0) {
 9 |                 return "$year Leap Year";
10 |             } else {
11 |                 return " Not a leap year";
12 |             }
13 |         } else {
14 |             return "$year Leap Year";
15 |         }
16 |     } else {
17 |         return "Not Leap Year";
18 |     }
19 | }
20 | echo lepaYear(2004);
21 | 


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/hw/Assignment 3/samim/header.php:
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 1 | <!DOCTYPE html>
 2 | <html lang="en">
 3 | <head>
 4 |     <meta charset="UTF-8">
 5 |     <meta name="viewport" content="width=device-width, initial-scale=1.0">
 6 |     <title>DIPTI - Assignment</title>
 7 | 
 8 |     
 9 | <!-- Include SweetAlert from a CDN -->
10 | <script src="https://cdn.jsdelivr.net/npm/sweetalert2@11"></script>
11 | 
12 | 
13 |     <!-- Bootstrap css  -->
14 |     <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.1/dist/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-4bw+/aepP/YC94hEpVNVgiZdgIC5+VKNBQNGCHeKRQN+PtmoHDEXuppvnDJzQIu9" crossorigin="anonymous">
15 | 
16 | </head>
17 | <body class="">
18 | 


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/l4-loop.php:
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 1 | <?php
 2 | 
 3 | /**
 4 |  * starting point
 5 |  * ending point
 6 |  * increment/decrement
 7 |  * task
 8 |  */
 9 | 
10 | /* $x = 1;
11 | while ($x < 10) {
12 |     if ($x % 2 == 0) {
13 |         echo $x . "<br>";
14 |     }
15 |     $x++;
16 | }
17 |  */
18 | /**
19 |  * limit 1-100
20 |  * devided by 7
21 |  * remaining 5
22 |  */
23 | 
24 | 
25 | /* echo 0 . "<br>";
26 | echo 1 . "<br>";
27 | echo 2 . "<br>";
28 | echo 3 . "<br>";
29 | echo 4 . "<br>";
30 | echo 5 . "<br>";
31 | echo 6 . "<br>";
32 | echo 7 . "<br>";
33 | echo 8 . "<br>";
34 | echo 9 . "<br>"; */
35 | 
36 | $n = 2;
37 | for ($i = 1; $i <= 10; $i++) {
38 |     echo $n . " x " . $i . " = " . $n * $i . "<br>";
39 | }
40 | 


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/l10-crud/delete.php:
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 1 | <?php  
 2 |     $id = $_GET["id"] ?? header("location: ./");
 3 |     $conn = mysqli_connect("localhost","root","", "ia20");
 4 |     $check = $conn->query("SELECT * FROM `students` WHERE `id` = '$id'");
 5 |     $isOkay = $check->num_rows == 0 ? header("location: ./"):true;
 6 |     if($isOkay){
 7 |         $delete = $conn->query("DELETE FROM `students` WHERE `id` = '$id'");
 8 |         if($delete){
 9 |             echo "<script>
10 |                 alert('Student Deleted Successfully');
11 |                 window.location.href = './';
12 |             </script>";
13 |         }else{
14 |             echo "<script>
15 |             alert('Failed to delete student');
16 |             window.location.href = './';
17 |             </script>";
18 |         }
19 |     }
20 | ?>


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/l2-operaor.php:
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 1 | <?php  
 2 |     //Arethmetic operator
 3 |     /**
 4 |      * +
 5 |      * -
 6 |      * *
 7 |      * /
 8 |      * %
 9 |      */
10 | 
11 |     // Assignment operator
12 |     /**
13 |      * =
14 |      * +=
15 |      * -=
16 |      * *=
17 |      * /=
18 |      * %=
19 |      */
20 | 
21 |     // Increment/drement operator
22 |     /**
23 |      * ++
24 |      * --
25 |      */
26 | 
27 |     // conditonal operator
28 |     /**
29 |      * ==
30 |      * ===
31 |      * <
32 |      * >
33 |      * <=
34 |      * >=
35 |      * !=
36 |      * !==
37 |      * <>
38 |      */
39 | 
40 |     // logical operator
41 |     /**
42 |      * &&
43 |      * ||
44 |      * and
45 |      * or
46 |      * xor
47 |      */
48 | 
49 |     $momen = "Web";
50 |     $mostafiz = "Developer";
51 |     // echo $momen." ".$mostafiz;
52 |     echo "$momen - $mostafiz";
53 | ?>


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/authentication/login.php:
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 1 | <?php 
 2 |     include_once("./header.php");
 3 | ?>
 4 |     <div class="container fixed-top z-0">
 5 |         <div class="row min-vh-100 d-flex">
 6 |             <div class="col-4 m-auto border shadow p-3 rounded">
 7 |                 <h2 class="mb-3">Login In </h2>
 8 |                 <form action="" method="post">
 9 |                     <div class="mb-3">
10 |                         <input type="text" placeholder="Your Email" class="form-control">
11 |                     </div>
12 |                     <div class="mb-3">
13 |                         <input type="password" placeholder="Your Password" class="form-control">
14 |                     </div>
15 |                     <button type="submit" class="btn btn-dark">Log in</button>
16 |                 </form>
17 |             </div>
18 |         </div>
19 |     </div>
20 | <?php
21 |     include_once("./footer.php");
22 | ?>
23 |     


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/l6-array2.php:
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 1 | <?php 
 2 |     // assosiative array
 3 |     $chandpur = ["bs" => "boro station", "cs" => "choto station", "nb" => "nou bondor"];
 4 |     echo "<h3>".$chandpur["nb"]."</h3>";
 5 | 
 6 |     foreach($chandpur as $mirpur){
 7 |         echo "$mirpur<br>";
 8 |     }
 9 | 
10 |     //multi daimontional array
11 |     
12 |     $students = [
13 |         ["Momen", "Keranigank", 22],
14 |         ["Nurul", "Munshiganj", 21],
15 |         ["Shuvo", "Noyakhali", 23]
16 |     ];
17 | 
18 |     echo "<pre>";
19 |     print_r($students);
20 |     echo "</pre>";
21 | 
22 |     echo "<pre>";
23 |     print_r($students[1]);
24 |     echo "</pre>";
25 | 
26 |     echo $students[2][1]."<br>";
27 | 
28 | 
29 |     for ($i=0; $i < count($students); $i++) { 
30 |         for ($j=0; $j < count($students[$i]); $j++) { 
31 |             echo $students[$i][$j]." ";
32 |         }
33 |         echo "<br>";
34 |     }
35 | 
36 |     foreach ($students as $value) {
37 |         foreach ($value as $alue) {
38 |             echo $alue. " ";
39 |         }
40 |         echo "<br>";
41 |     }
42 |     ?>
43 | 
44 |     


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/others/getUserInfo/index.html:
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 1 | <!DOCTYPE html>
 2 | <html lang="en">
 3 | 
 4 | <head>
 5 |     <meta charset="UTF-8">
 6 |     <meta name="viewport" content="width=device-width, initial-scale=1.0">
 7 |     <title>Document</title>
 8 | </head>
 9 | 
10 | <body>
11 | 
12 | 
13 |     <script>
14 |         // Get the user agent string
15 |         var userAgent = navigator.userAgent;
16 | 
17 |         // Initialize variables to store the browser name
18 |         var browserName;
19 | 
20 |         // Check if the user agent string contains specific keywords to identify the browser
21 |         if (userAgent.includes("Chrome")) {
22 |             browserName = "Google Chrome";
23 |         } else if (userAgent.includes("Firefox")) {
24 |             browserName = "Mozilla Firefox";
25 |         } else if (userAgent.includes("Safari") && !userAgent.includes("Chrome")) {
26 |             browserName = "Apple Safari";
27 |         } else if (userAgent.includes("Edge")) {
28 |             browserName = "Microsoft Edge";
29 |         } else if (userAgent.includes("MSIE") || userAgent.includes("Trident/")) {
30 |             browserName = "Internet Explorer";
31 |         } else {
32 |             browserName = "Unknown Browser";
33 |         }
34 | 
35 |         console.log("Browser Name: " + browserName);
36 | 
37 | 
38 |     </script>
39 | </body>
40 | 
41 | </html>


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/l5-array.php:
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 1 | <?php  
 2 |     // $arr = array("Dhaka", "Rajshahi", "Khulna", "Kuyakata");
 3 |     // indexed array
 4 | 
 5 |     $cities = ["Dhaka", "Rajshahi", "Khulna", "Kuyakata"];
 6 |     // echo $cities[0];
 7 |     array_push($cities, "Chadpur", "Gopalganj");
 8 |     array_pop($cities);
 9 |     array_unshift($cities, "Noyakhali", "Barishal");
10 |     array_shift($cities);
11 |     $alada_array = array_slice($cities, 2, 4);
12 | 
13 |     $new_arr = ["Chadpur"];
14 | 
15 |     $rkk = array_diff($alada_array, $new_arr);
16 | 
17 |     echo "<pre>";
18 |     var_dump($cities);
19 |     echo "</pre>";
20 | 
21 |     echo "<pre>";
22 |     print_r($cities);
23 |     echo "</pre>";
24 | 
25 |     echo "<pre>";
26 |     print_r($alada_array);
27 |     echo "</pre>";
28 | 
29 |     echo "<pre>";
30 |     print_r($rkk);
31 |     echo "</pre>";
32 | 
33 |     $x = ["Momen", "Mustafiz", "Shariar", "Nurul", "Mery"];
34 | 
35 |     for ($i=0; $i < count($x); $i++) { 
36 |         echo "$x[$i] <br>";
37 |     }
38 | 
39 |     foreach ($x as $key => $val) {
40 |         echo ($key+1).": ".$val."<br>";
41 |     }
42 | 
43 | 
44 |     //associative array
45 |     $elaka = ["prothom" => "Kalabagan", "ditiyo" => "Kathal Bagan"];
46 |     echo "<pre>";
47 |     print_r($elaka);
48 |     echo "</pre>";
49 | 
50 |     echo $elaka["ditiyo"]
51 |     //multidimontional array
52 |     
53 | ?>


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/l10-crud/edit.php:
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 1 | <?php  
 2 |     $id = $_GET["id"] ?? header("location: ./");
 3 |     $conn = mysqli_connect("localhost","root","", "ia20");
 4 |     $check = $conn->query("SELECT * FROM `students` WHERE `id` = '$id'");
 5 |     $check->num_rows == 0 ? header("location: ./"):true;
 6 |     $row = $check->fetch_assoc();
 7 |     if (isset($_POST["upStu"])) {
 8 |         $name = $_POST["name"];
 9 |         $city = $_POST["city"];
10 |         $gender = $_POST["gender"];
11 |         $update = $conn->query("UPDATE `students` SET `name`='$name',`city`='$city',`gender`='$gender' WHERE `id` = '$id'");
12 |         if($update){
13 |             echo "<script>alert('Student Updated Successfully')</script>";
14 |         }else{
15 |             echo "<script>alert('Failed to update student')</script>";
16 |         }
17 |     }
18 | ?>
19 | 
20 | <h2>Update Student</h2>
21 | <form action="" method="post">
22 |     <input type="text" name="name" placeholder="Student Name" required value="<?= $row['name'] ?>">
23 |     <br><br>
24 |     <input type="text" name="city" placeholder="Student City" required value="<?= $row['city'] ?>">
25 |     <br><br>
26 |     <input type="radio" name="gender" value="Male" required <?= $row['gender'] == "Male" ? 'checked':null ?>>Male
27 |     <input type="radio" name="gender" value="Female" required <?= $row['gender'] == "Female" ? 'checked':null ?>>Female
28 |     <br><br>
29 |     <input type="submit" value="Edit Student" name="upStu">
30 | </form>
31 | <a href="./">Back</a>


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/hw/Assignment 3/samim/index.php:
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 1 | <?php 
 2 | include "header.php"; 
 3 | include "data.php";
 4 | 
 5 |  ?>
 6 | 
 7 | <div class="container">
 8 |     <div class="col-6 mx-auto">
 9 |         <h2 class="text-center text-success py-2 ">Enter a year for leap year checking...</h2>
10 |         <form action="<?php echo $_SERVER['PHP_SELF'] ?>" method="POST">
11 |             <div class="mb-3">
12 |                 <input type="number" class="form-control" name="year" placeholder="Enter a year..." autofocus>
13 |             </div>
14 |             <button type="submit" class="btn btn-warning bold col-12">Check</button>
15 |         </form>
16 | 
17 |         <?php
18 | 
19 |         if($_SERVER['REQUEST_METHOD'] == "POST") {
20 |             $year = (int)$_POST['year'];
21 |             // Function for all type of alert....
22 |             function showAlert($type,$title,$text) {
23 |                 echo '<script>
24 |                 Swal.fire({
25 |                     icon: "'.$type.'",
26 |                     title: "'.$title.'",
27 |                     text: "'.$text.'",
28 |                     position: "center",
29 |                     showConfirmButton: false,
30 |                     timer: 3000 
31 |                 });
32 |               </script>';
33 |             }
34 |             if(!empty($year)) {
35 |                 if(($year % 4 == 0 && $year % 100 != 0) || ($year % 400 == 0)) {
36 |                     showAlert("success","Yesssss!","This is a leap year.");
37 |                 }else {
38 |                     showAlert("info","Opppsss!","This is not a leap year.");
39 |                 }
40 |             }else {
41 |                 showAlert("error","Error!","You must enter a valid year.");
42 |             }
43 |         }
44 | 
45 |         ?>
46 |         
47 |     </div>
48 | </div>
49 | 
50 | <?php include "footer.php" ?>


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/hw/Assignment 2/samim/index.php:
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 1 | <?php 
 2 | include "header.php"; 
 3 | include "data.php";
 4 | 
 5 |  ?>
 6 | 
 7 | <div class="container">
 8 |     <div class="col-6 mx-auto">
 9 | 
10 |         <h2 class="text-center text-success py-2 ">Pick your favourite country from down below...</h2>
11 |         <form action="index.php" method="GET">
12 |             <select class="form-select" onchange="changeValue(this.value)">
13 |             <option selected value=""  class="text-center">-----Selet your favourite country for this Word cup-----
14 |             </option>
15 |             <?php 
16 |                 if(!$countries == null) {
17 |                     foreach($countries as $key=>$country) {
18 |                         if($country === "Bangladesh") {
19 |                             $entity = "&hearts;";
20 |                             $love = html_entity_decode($entity);
21 | 
22 |                             echo "<option value='{$country}' class='text-success'>".$love, $love, $love, $love, $country, $love, $love, $love, $love. "</option>";
23 |                         }else {
24 |                             echo "<option value='{$country}'>{$country}</option>";
25 |                         }
26 |                     }
27 |                 }
28 |                 else {
29 |                     echo "<option>No Data here...</option>";
30 |                 }
31 |             ?>
32 |             </select>
33 |         </form>
34 | 
35 |         <h2 class="text-center mt-5 text-info" id="show"></h2>
36 |         
37 |         
38 |     </div>
39 | </div>
40 | 
41 | <script>
42 | 
43 |                 function changeValue(e) {
44 |                     document.getElementById('show').innerHTML = "<-  " +e+ "  ->";
45 |                     // alert(e);
46 |                  }
47 |     
48 | </script>
49 | 
50 | 
51 | 
52 | <?php include "footer.php" ?>


--------------------------------------------------------------------------------
/l10-crud/index.php:
--------------------------------------------------------------------------------
 1 | <?php  
 2 |     $conn = mysqli_connect("localhost","root","", "ia20");
 3 | 
 4 |     if(isset($_POST["addStu"])){
 5 |         $name = $_POST["name"];
 6 |         $city = $_POST["city"];
 7 |         $gender = $_POST["gender"];
 8 |         $insert = $conn->query("INSERT INTO `students`(`name`, `city`, `gender`) VALUES ('$name', '$city', '$gender')");
 9 |         if($insert){
10 |             echo "<script>alert('Student Added Successfully')</script>";
11 |         }else{
12 |             echo "<script>alert('Failed to add student')</script>";
13 |         }
14 |     }
15 | 
16 |     $select = $conn->query("SELECT * FROM `students`");
17 | ?>
18 | 
19 | <h2>Add Student</h2>
20 | <form action="" method="post">
21 |     <input type="text" name="name" placeholder="Student Name" required>
22 |     <br><br>
23 |     <input type="text" name="city" placeholder="Student City" required>
24 |     <br><br>
25 |     <input type="radio" name="gender" value="Male" required>Male
26 |     <input type="radio" name="gender" value="Female" required>Female
27 |     <br><br>
28 |     <input type="submit" value="Add Student" name="addStu">
29 | </form>
30 | 
31 | <table>
32 |     <tr>
33 |         <th>ID</th>
34 |         <th>Name</th>
35 |         <th>Gender</th>
36 |         <th>City</th>
37 |         <th>Action</th>
38 |     </tr>
39 |     <?php while($row = $select->fetch_assoc()){ ?>
40 |         <tr>
41 |             <td><?= $row["id"] ?></td>
42 |             <td><?= $row["name"] ?></td>
43 |             <td><?= $row["gender"] ?></td>
44 |             <td><?= $row["city"] ?></td>
45 |             <td>
46 |                 <a href="edit.php?id=<?= $row["id"] ?>">Edit</a>
47 |                 <a href="delete.php?id=<?= $row["id"] ?>" onclick="return confirm('Are you sure?')">Delete</a>
48 |                 <!-- confirm delete button -->
49 |             </td>
50 |         </tr>
51 |     <?php } ?>
52 | </table>
53 | 
54 | 
55 | 


--------------------------------------------------------------------------------
/l7-date-bf.php:
--------------------------------------------------------------------------------
 1 | <?php
 2 | date_default_timezone_set("Asia/Dhaka");
 3 | echo date("d-m-y h:i:s a D") . "<br>";
 4 | echo date("d/M/Y H:i:s A l") . "<br>";
 5 | echo date("d/F/Y H:i:s A l") . "<br>";
 6 | 
 7 | //mktime(hour, minute, second, month, day, year)
 8 | 
 9 | $bday = mktime(0, 0, 0, 3, 26, 2024);
10 | echo date("d/M/Y l", $bday) . "<br>";
11 | 
12 | //strtotime
13 | $today = strtotime("+10 years +5 months +10 days");
14 | echo date("d/M/Y l", $today) . "<br>";
15 | 
16 | $nextFriday = strtotime("next friday");
17 | $endDate = strtotime("+6 weeks", $nextFriday);
18 | while ($nextFriday <= $endDate) {
19 |     echo date("d/M/Y l", $nextFriday) . "<br>";
20 |     $nextFriday = strtotime("+1 week", $nextFriday);
21 | }
22 | 
23 | $str = "The quick brown fox jumps over the lazy dog";
24 | echo strlen($str) . "<br>";
25 | echo str_word_count($str) . "<br>";
26 | echo strrev($str) . "<br>";
27 | echo strpos($str, "fox") . "<br>";
28 | echo str_replace("fox", "cat", $str) . "<br>";
29 | echo str_repeat($str, 5) . "<br>";
30 | echo strtoupper($str) . "<br>";
31 | echo strtolower($str) . "<br>";
32 | echo ucfirst($str) . "<br>";
33 | echo ucwords($str) . "<br>";
34 | 
35 | //explode
36 | $fruits = "mango banana apple orange pineapple";
37 | $fruitList = explode(" ", $fruits);
38 | echo "<pre>";
39 | print_r($fruitList);
40 | echo "</pre>";
41 | 
42 | //implode
43 | $fruitList = ["mango", "banana", "apple", "orange", "pineapple"];
44 | $fruits = implode(" ", $fruitList);
45 | echo $fruits . "<br>";
46 | 
47 | // $_GET[]
48 | /* echo $_GET["city"] . "<br>";
49 | echo $_GET["gender"] . "<br>"; */
50 | 
51 | // $_SERVER
52 | echo $_SERVER["SERVER_NAME"] . $_SERVER["PHP_SELF"] . "<br>";
53 | 
54 | ?>
55 | 
56 | <a href="<?= $_SERVER["PHP_SELF"] . '?c=bd' ?>">
57 |     <button>Bangladesh</button>
58 | </a>
59 | <a href="<?= $_SERVER["PHP_SELF"] . '?c=in' ?>">
60 |     <button>India</button>
61 | </a>
62 | <br><br>
63 | <?php
64 | if (isset($_GET["c"])) {
65 |     if ($_GET["c"] == "bd") {
66 |         echo "Bangladesh";
67 |     } else if ($_GET["c"] == "in") {
68 |         echo "India";
69 |     }
70 | }
71 | ?>


--------------------------------------------------------------------------------
/authentication/header.php:
--------------------------------------------------------------------------------
 1 | <?php
 2 | include_once("./db.php");
 3 | ?>
 4 | <!doctype html>
 5 | <html lang="en">
 6 | 
 7 | <head>
 8 |   <meta charset="utf-8">
 9 |   <meta name="viewport" content="width=device-width, initial-scale=1">
10 |   <title>Bootstrap demo</title>
11 |   <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/bootstrap-icons/1.11.1/font/bootstrap-icons.min.css" integrity="sha512-oAvZuuYVzkcTc2dH5z1ZJup5OmSQ000qlfRvuoTTiyTBjwX1faoyearj8KdMq0LgsBTHMrRuMek7s+CxF8yE+w==" crossorigin="anonymous" referrerpolicy="no-referrer" />
12 |   <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.2/dist/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-T3c6CoIi6uLrA9TneNEoa7RxnatzjcDSCmG1MXxSR1GAsXEV/Dwwykc2MPK8M2HN" crossorigin="anonymous">
13 |   <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/toastr.js/2.1.4/toastr.min.css" integrity="sha512-6S2HWzVFxruDlZxI3sXOZZ4/eJ8AcxkQH1+JjSe/ONCEqR9L4Ysq5JdT5ipqtzU7WHalNwzwBv+iE51gNHJNqQ==" crossorigin="anonymous" referrerpolicy="no-referrer" />
14 |   <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.7.1/jquery.min.js" integrity="sha512-v2CJ7UaYy4JwqLDIrZUI/4hqeoQieOmAZNXBeQyjo21dadnwR+8ZaIJVT8EE2iyI61OV8e6M8PP2/4hpQINQ/g==" crossorigin="anonymous" referrerpolicy="no-referrer"></script>
15 |   <script src="https://cdnjs.cloudflare.com/ajax/libs/toastr.js/2.1.4/toastr.min.js" integrity="sha512-lbwH47l/tPXJYG9AcFNoJaTMhGvYWhVM9YI43CT+uteTRRaiLCui8snIgyAN8XWgNjNhCqlAUdzZptso6OCoFQ==" crossorigin="anonymous" referrerpolicy="no-referrer"></script>
16 |   <script>
17 |     toastr.options = {
18 |       "closeButton": false,
19 |       "debug": false,
20 |       "newestOnTop": false,
21 |       "progressBar": false,
22 |       "positionClass": "toast-bottom-right",
23 |       "preventDuplicates": false,
24 |       "onclick": null,
25 |       "showDuration": "300",
26 |       "hideDuration": "1000",
27 |       "timeOut": "5000",
28 |       "extendedTimeOut": "1000",
29 |       "showEasing": "swing",
30 |       "hideEasing": "linear",
31 |       "showMethod": "fadeIn",
32 |       "hideMethod": "fadeOut"
33 |     }
34 |   </script>
35 | </head>
36 | 
37 | <body>
38 |   <?php
39 |   include_once("./navbar.php");
40 |   ?>


--------------------------------------------------------------------------------
/hw/Assignment 2/samim/data.php:
--------------------------------------------------------------------------------
1 | <?php
2 | 
3 | $countries = ['Afghanistan','Albania','Algeria','Andorra','Angola','Antigua and Barbuda','Argentina','Armenia','Australia','Austria','Azerbaijan','Bahamas','Bahrain','Bangladesh','Barbados','Belarus','Belgium','Belize','Benin','Bhutan','Bolivia','Bosnia and Herzegovina','Botswana','Brazil','Brunei','Bulgaria','Burkina Faso','Burundi','Cabo Verde','Cambodia','Cameroon','Canada','Central African Republic','Chad','Chile','China','Colombia','Comoros','Congo (Congo-Brazzaville)','Costa Rica','Croatia','Cuba','Cyprus','Czechia (Czech Republic)','Democratic Republic of the Congo (Congo-Kinshasa)','Denmark','Djibouti','Dominica','Dominican Republic','East Timor (Timor-Leste)','Ecuador','Egypt','El Salvador','Equatorial Guinea','Eritrea','Estonia','Eswatini','Ethiopia','Fiji','Finland','France','Gabon','Gambia','Georgia','Germany','Ghana','Greece','Grenada','Guatemala','Guinea','Guinea-Bissau','Guyana','Haiti','Holy See','Honduras','Hungary','Iceland','India','Indonesia','Iran','Iraq','Ireland','Israel','Italy','Ivory Coast','Jamaica','Japan','Jordan','Kazakhstan','Kenya','Kiribati','Kosovo','Kuwait','Kyrgyzstan','Laos','Latvia','Lebanon','Lesotho','Liberia','Libya','Liechtenstein','Lithuania','Luxembourg','Madagascar','Malawi','Malaysia','Maldives','Mali','Malta','Marshall Islands','Mauritania','Mauritius','Mexico','Micronesia','Moldova','Monaco','Mongolia','Montenegro','Morocco','Mozambique','Myanmar (formerly Burma)','Namibia','Nauru','Nepal','Netherlands','New Zealand','Nicaragua','Niger','Nigeria','North Korea','North Macedonia (formerly Macedonia)','Norway','Oman','Pakistan','Palau','Palestine State','Panama','Papua New Guinea','Paraguay','Peru','Philippines','Poland','Portugal','Qatar','Romania','Russia','Rwanda','Saint Kitts and Nevis','Saint Lucia','Saint Vincent and the Grenadines','Samoa','San Marino','Sao Tome and Principe','Saudi Arabia','Senegal','Serbia','Seychelles','Sierra Leone','Singapore','Slovakia','Slovenia','Solomon Islands','Somalia','South Africa','South Korea','South Sudan','Spain','Sri Lanka','Sudan','Suriname','Sweden','Switzerland','Syria','Taiwan','Tajikistan','Tanzania','Thailand','Togo','Tonga','Trinidad and Tobago','Tunisia','Turkey','Turkmenistan','Tuvalu','Uganda','Ukraine','United Arab Emirates','United Kingdom','United States of America','Uruguay','Uzbekistan','Vanuatu','Venezuela','Vietnam','Yemen','Zambia','Zimbabwe'];
4 | 
5 | 
6 | ?>


--------------------------------------------------------------------------------
/l3-condition-function.php:
--------------------------------------------------------------------------------
  1 | <?php
  2 | $age = 5;
  3 | if ($age > 30) {
  4 |     echo "Joy Bangla";
  5 | } elseif ($age > 10) {
  6 |     echo "Amar Bangladesh";
  7 | } elseif ($age != 5) {
  8 |     echo "Amader Bangladesh";
  9 | } else {
 10 |     echo "Dhaka";
 11 | }
 12 | 
 13 | /**
 14 |  * age <= 12 you are a baby
 15 |  * age <= 19 you are a teenager
 16 |  * age <= 29 you are a young person
 17 |  * age <= 49 you are a middle aged person
 18 |  * age > 50 && age < 150 you are an old person
 19 |  * else you are not on this world 
 20 |  */
 21 | echo "<br>";
 22 | $city = "Noyakhali";
 23 | 
 24 | switch ($city) {
 25 |     case 'Noyakhali':
 26 |         echo "Noakhali bivag chai";
 27 |         break;
 28 | 
 29 |     case 'Barishal':
 30 |         echo "Barishale one nodi ase";
 31 |         break;
 32 | 
 33 |     case 'Dhaka':
 34 |         echo "Dhaka is the cpital of Bangladesh";
 35 |         break;
 36 | 
 37 |     default:
 38 |         echo "Please input valid city";
 39 |         break;
 40 | }
 41 | 
 42 | echo "<br>";
 43 | 
 44 | $sub = "Java";
 45 | /* if($sub === "PHP"){
 46 |         echo "We are php developer";
 47 |     }else{
 48 |         echo "We are not a php developer";
 49 |     } */
 50 | echo $sub === "PHP" ? "We are php developer" : ($sub === "JavaScript" ? "We are JS developer" : "We are not a developer");
 51 | 
 52 | /*
 53 | 
 54 |     condition ? true:false
 55 | 
 56 |     */
 57 | 
 58 | /**
 59 |  * $name = "";
 60 |  * $name == "Asif"
 61 |  */
 62 | echo "<br>";
 63 | 
 64 | function person($fname = "Sakib", $lname = "Khan")
 65 | {
 66 |     return "$fname $lname";
 67 | }
 68 | 
 69 | echo person("Momen", "Uddin") . "<br>";
 70 | echo person("Mostafizur", "Rahman") . "<br>";
 71 | echo person() . "<br>";
 72 | echo person("Bubly") . "<br>";
 73 | echo person(lname: "All Hasan") . "<br>";
 74 | 
 75 | /**
 76 |  * make a function
 77 |  * function takes two perameter
 78 |  * function will validate that the values of all perameters are integer
 79 |  * function will return a error message if the values are not number
 80 |  * if all the values are number, function will return the sum of those number
 81 |  */
 82 | 
 83 | function number($x, $y)
 84 | {
 85 |     if (!is_int($x) || !is_int($y)) {
 86 |         return "Invalid number probvided <br>";
 87 |     }
 88 |     $m = $x + $y . "<br>";
 89 |     return "$m";
 90 | }
 91 | 
 92 | 
 93 | // recursive function
 94 | function factorial($n)
 95 | {
 96 |     if ($n <= 1) {
 97 |         return 1;
 98 |     }
 99 |     return $n * factorial($n - 1);
100 | }
101 | echo factorial(5);
102 | 


--------------------------------------------------------------------------------
/authentication/navbar.php:
--------------------------------------------------------------------------------
 1 | <?php  
 2 |     $pageName = basename($_SERVER['PHP_SELF']);
 3 | ?>
 4 | <nav class="navbar navbar-expand-lg bg-dark navbar-dark z-1">
 5 |     <div class="container">
 6 |         <a class="navbar-brand" href="./">DIPTI</a>
 7 |         <button class="navbar-toggler" type="button" data-bs-toggle="collapse" data-bs-target="#navbarSupportedContent" aria-controls="navbarSupportedContent" aria-expanded="false" aria-label="Toggle navigation">
 8 |             <span class="navbar-toggler-icon"></span>
 9 |         </button>
10 |         <div class="collapse navbar-collapse" id="navbarSupportedContent">
11 |             <ul class="navbar-nav ms-auto mb-2 mb-lg-0">
12 |                 <li class="nav-item">
13 |                     <a class="nav-link" aria-current="page" href="#">All Student</a>
14 |                 </li>
15 |                 <li class="nav-item">
16 |                     <a class="nav-link" href="#">Add New Student</a>
17 |                 </li>
18 |                 <li class="nav-item dropdown">
19 |                     <a class="nav-link dropdown-toggle" href="#" role="button" data-bs-toggle="dropdown" aria-expanded="false">
20 |                         <?= "User Name" ?>
21 |                     </a>
22 |                     <ul class="dropdown-menu">
23 |                         <li><a class="dropdown-item" href="#">Profile</a></li>
24 |                         <li><a class="dropdown-item" href="#">Change Passs</a></li>
25 |                         <li>
26 |                             <hr class="dropdown-divider">
27 |                         </li>
28 |                         <li><a class="dropdown-item" href="#">Logout</a></li>
29 |                     </ul>
30 |                 </li>
31 |                 <li class="nav-item">
32 |                     <a class="nav-link <?= $pageName === "login.php" ? "active":null ?>" href="./login.php">Log in</a>
33 |                 </li>
34 |                 <li class="nav-item">
35 |                     <a class="nav-link <?= $pageName === "signup.php" ? "active":null ?>" href="./signup.php">Sign up</a>
36 |                 </li>
37 |             </ul>
38 |             <form class="d-flex" role="search">
39 |                 <div class="input-group">
40 |                     <input type="text" class="form-control" placeholder="Search Student..." aria-label="Username" aria-describedby="basic-addon1">
41 |                     <button class="input-group-text" id="basic-addon1" type="submit">
42 |                         <i class="bi bi-search"></i>
43 |                     </button>
44 |                 </div>
45 |             </form>
46 |         </div>
47 |     </div>
48 | </nav>


--------------------------------------------------------------------------------
/hw/Assignment 2/nurul.php:
--------------------------------------------------------------------------------
 1 | <?php
 2 | $countries = ['Afghanistan', 'Albania', 'Algeria', 'Andorra', 'Angola', 'Antigua and Barbuda', 'Argentina', 'Armenia', 'Australia', 'Austria', 'Azerbaijan', 'Bahamas', 'Bahrain', 'Bangladesh', 'Barbados', 'Belarus', 'Belgium', 'Belize', 'Benin', 'Bhutan', 'Bolivia', 'Bosnia and Herzegovina', 'Botswana', 'Brazil', 'Brunei', 'Bulgaria', 'Burkina Faso', 'Burundi', 'Cabo Verde', 'Cambodia', 'Cameroon', 'Canada', 'Central African Republic', 'Chad', 'Chile', 'China', 'Colombia', 'Comoros', 'Congo (Congo-Brazzaville)', 'Costa Rica', 'Croatia', 'Cuba', 'Cyprus', 'Czechia (Czech Republic)', 'Democratic Republic of the Congo (Congo-Kinshasa)', 'Denmark', 'Djibouti', 'Dominica', 'Dominican Republic', 'East Timor (Timor-Leste)', 'Ecuador', 'Egypt', 'El Salvador', 'Equatorial Guinea', 'Eritrea', 'Estonia', 'Eswatini', 'Ethiopia', 'Fiji', 'Finland', 'France', 'Gabon', 'Gambia', 'Georgia', 'Germany', 'Ghana', 'Greece', 'Grenada', 'Guatemala', 'Guinea', 'Guinea-Bissau', 'Guyana', 'Haiti', 'Holy See', 'Honduras', 'Hungary', 'Iceland', 'India', 'Indonesia', 'Iran', 'Iraq', 'Ireland', 'Israel', 'Italy', 'Ivory Coast', 'Jamaica', 'Japan', 'Jordan', 'Kazakhstan', 'Kenya', 'Kiribati', 'Kosovo', 'Kuwait', 'Kyrgyzstan', 'Laos', 'Latvia', 'Lebanon', 'Lesotho', 'Liberia', 'Libya', 'Liechtenstein', 'Lithuania', 'Luxembourg', 'Madagascar', 'Malawi', 'Malaysia', 'Maldives', 'Mali', 'Malta', 'Marshall Islands', 'Mauritania', 'Mauritius', 'Mexico', 'Micronesia', 'Moldova', 'Monaco', 'Mongolia', 'Montenegro', 'Morocco', 'Mozambique', 'Myanmar (formerly Burma)', 'Namibia', 'Nauru', 'Nepal', 'Netherlands', 'New Zealand', 'Nicaragua', 'Niger', 'Nigeria', 'North Korea', 'North Macedonia (formerly Macedonia)', 'Norway', 'Oman', 'Pakistan', 'Palau', 'Palestine State', 'Panama', 'Papua New Guinea', 'Paraguay', 'Peru', 'Philippines', 'Poland', 'Portugal', 'Qatar', 'Romania', 'Russia', 'Rwanda', 'Saint Kitts and Nevis', 'Saint Lucia', 'Saint Vincent and the Grenadines', 'Samoa', 'San Marino', 'Sao Tome and Principe', 'Saudi Arabia', 'Senegal', 'Serbia', 'Seychelles', 'Sierra Leone', 'Singapore', 'Slovakia', 'Slovenia', 'Solomon Islands', 'Somalia', 'South Africa', 'South Korea', 'South Sudan', 'Spain', 'Sri Lanka', 'Sudan', 'Suriname', 'Sweden', 'Switzerland', 'Syria', 'Taiwan', 'Tajikistan', 'Tanzania', 'Thailand', 'Togo', 'Tonga', 'Trinidad and Tobago', 'Tunisia', 'Turkey', 'Turkmenistan', 'Tuvalu', 'Uganda', 'Ukraine', 'United Arab Emirates', 'United Kingdom', 'United States of America', 'Uruguay', 'Uzbekistan', 'Vanuatu', 'Venezuela', 'Vietnam', 'Yemen', 'Zambia', 'Zimbabwe'];
 3 | ?>
 4 | 
 5 | <form action="" method="post">
 6 |     <h1>This is Country List</h1>
 7 |     <option value="">
 8 |         <?php
 9 |         foreach ($countries as $value) {
10 |             echo "$value </br>";
11 | 
12 |         }
13 | 
14 | 
15 |         ?>
16 |     </option>
17 | </form>


--------------------------------------------------------------------------------
/hw/Assignment 3/momen.php:
--------------------------------------------------------------------------------
  1 | <?php
  2 | 
  3 | function isLeapYear($year)
  4 | {
  5 |     if (($year % 4 == 0 && $year % 100 != 0) || ($year % 400 == 0)) {
  6 |         return true;
  7 |     } else {
  8 |         return false;
  9 |     }
 10 | }
 11 | 
 12 | 
 13 | 
 14 | if (isset($_POST['number']) && $_POST['number'] != NULL && $_POST['number'] > 0) {
 15 | 
 16 |     $year = (int) $_POST['number'];
 17 | 
 18 |     $leapYear = (isLeapYear($year)) ? "$year is a leap year." : "$year is not a leap year.";
 19 | 
 20 | } else {
 21 |     $leapYear = "";
 22 | }
 23 | 
 24 | 
 25 | 
 26 | 
 27 | ?>
 28 | <!DOCTYPE html>
 29 | <html lang="en">
 30 | 
 31 | <head>
 32 |     <meta charset="UTF-8">
 33 |     <meta name="viewport" content="width=device-width, initial-scale=1.0">
 34 |     <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.0.2/dist/css/bootstrap.min.css" rel="stylesheet"
 35 |         integrity="sha384-EVSTQN3/azprG1Anm3QDgpJLIm9Nao0Yz1ztcQTwFspd3yD65VohhpuuCOmLASjC" crossorigin="anonymous">
 36 | 
 37 |     <title>Leap Year Calculation</title>
 38 | 
 39 |     <style>
 40 |         * {
 41 |             margin: 0;
 42 |             padding: 0;
 43 |             box-sizing: border-box;
 44 |         }
 45 | 
 46 |         .design {
 47 |             margin: auto;
 48 |             border: 2px solid #198754;
 49 |             border-radius: 10px;
 50 |             height: 45dvh;
 51 | 
 52 |         }
 53 | 
 54 |         /* Chrome, Safari, Edge, Opera */
 55 |         input::-webkit-outer-spin-button,
 56 |         input::-webkit-inner-spin-button {
 57 |         -webkit-appearance: none;
 58 |         margin: 0;
 59 |         }
 60 | 
 61 |         /* Firefox */
 62 |         input[type=number] {
 63 |         -moz-appearance: textfield;
 64 |         }
 65 | 
 66 |     </style>
 67 | 
 68 | </head>
 69 | 
 70 | <body style="background: #808080;">
 71 | 
 72 |     <div class="container">
 73 | 
 74 |         <div class="row" style="height:100dvh;">
 75 | 
 76 |             <div class="col-md-5 design bg-dark text-white p-5">
 77 |                     <h3 class="text-center">Leap Year Calculation</h3>
 78 |                 <form action="" method="POST">
 79 |                     <label for="number" class="form-label"> Give a Year:</label><br>
 80 |                     <input type="number" name="number" id="number"><br>
 81 |                     <input type="submit" value="Check" class="btn btn-success mt-2">
 82 |                 </form>
 83 | 
 84 |                 <div class="col-md-12 mt-2">
 85 |                   <h3><?= $leapYear ?></h3>  
 86 |                 </div>
 87 | 
 88 |             </div>
 89 | 
 90 |         </div>
 91 |     </div>
 92 | 
 93 | 
 94 |     <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.0.2/dist/js/bootstrap.bundle.min.js"
 95 |         integrity="sha384-MrcW6ZMFYlzcLA8Nl+NtUVF0sA7MsXsP1UyJoMp4YLEuNSfAP+JcXn/tWtIaxVXM"
 96 |         crossorigin="anonymous"></script>
 97 | 
 98 | </body>
 99 | 
100 | </html>


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/hw/Assignment 2/kabbya.php:
--------------------------------------------------------------------------------
 1 | <?php 
 2 |     $countries = ['Afghanistan','Albania','Algeria','Andorra','Angola','Antigua and Barbuda','Argentina','Armenia','Australia','Austria','Azerbaijan','Bahamas','Bahrain','Bangladesh','Barbados','Belarus','Belgium','Belize','Benin','Bhutan','Bolivia','Bosnia and Herzegovina','Botswana','Brazil','Brunei','Bulgaria','Burkina Faso','Burundi','Cabo Verde','Cambodia','Cameroon','Canada','Central African Republic','Chad','Chile','China','Colombia','Comoros','Congo (Congo-Brazzaville)','Costa Rica','Croatia','Cuba','Cyprus','Czechia (Czech Republic)','Democratic Republic of the Congo (Congo-Kinshasa)','Denmark','Djibouti','Dominica','Dominican Republic','East Timor (Timor-Leste)','Ecuador','Egypt','El Salvador','Equatorial Guinea','Eritrea','Estonia','Eswatini','Ethiopia','Fiji','Finland','France','Gabon','Gambia','Georgia','Germany','Ghana','Greece','Grenada','Guatemala','Guinea','Guinea-Bissau','Guyana','Haiti','Holy See','Honduras','Hungary','Iceland','India','Indonesia','Iran','Iraq','Ireland','Israel','Italy','Ivory Coast','Jamaica','Japan','Jordan','Kazakhstan','Kenya','Kiribati','Kosovo','Kuwait','Kyrgyzstan','Laos','Latvia','Lebanon','Lesotho','Liberia','Libya','Liechtenstein','Lithuania','Luxembourg','Madagascar','Malawi','Malaysia','Maldives','Mali','Malta','Marshall Islands','Mauritania','Mauritius','Mexico','Micronesia','Moldova','Monaco','Mongolia','Montenegro','Morocco','Mozambique','Myanmar (formerly Burma)','Namibia','Nauru','Nepal','Netherlands','New Zealand','Nicaragua','Niger','Nigeria','North Korea','North Macedonia (formerly Macedonia)','Norway','Oman','Pakistan','Palau','Palestine State','Panama','Papua New Guinea','Paraguay','Peru','Philippines','Poland','Portugal','Qatar','Romania','Russia','Rwanda','Saint Kitts and Nevis','Saint Lucia','Saint Vincent and the Grenadines','Samoa','San Marino','Sao Tome and Principe','Saudi Arabia','Senegal','Serbia','Seychelles','Sierra Leone','Singapore','Slovakia','Slovenia','Solomon Islands','Somalia','South Africa','South Korea','South Sudan','Spain','Sri Lanka','Sudan','Suriname','Sweden','Switzerland','Syria','Taiwan','Tajikistan','Tanzania','Thailand','Togo','Tonga','Trinidad and Tobago','Tunisia','Turkey','Turkmenistan','Tuvalu','Uganda','Ukraine','United Arab Emirates','United Kingdom','United States of America','Uruguay','Uzbekistan','Vanuatu','Venezuela','Vietnam','Yemen','Zambia','Zimbabwe'];
 3 | ?>
 4 | 
 5 | <!DOCTYPE html>
 6 | <html lang="en">
 7 | <head>
 8 |     <meta charset="UTF-8">
 9 |     <meta name="viewport" content="width=device-width, initial-scale=1.0">
10 |     <title>Kabbya-HW-2</title>
11 | </head>
12 | <body>
13 |     <form action="kabbya.php">
14 |         <select>
15 |             <option>Choose your Country</option>
16 |             <?php 
17 |                 foreach($countries as $country){
18 |                     echo "<option>$country</option>";
19 |                 }
20 |              ?>
21 |         </select>
22 |     </form>
23 | </body>
24 | </html>
25 | 


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/hw/Assignment 2/shariar.php:
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 1 | <?php
 2 | $countries = ['Afghanistan', 'Albania', 'Algeria', 'Andorra', 'Angola', 'Antigua and Barbuda', 'Argentina', 'Armenia', 'Australia', 'Austria', 'Azerbaijan', 'Bahamas', 'Bahrain', 'Bangladesh', 'Barbados', 'Belarus', 'Belgium', 'Belize', 'Benin', 'Bhutan', 'Bolivia', 'Bosnia and Herzegovina', 'Botswana', 'Brazil', 'Brunei', 'Bulgaria', 'Burkina Faso', 'Burundi', 'Cabo Verde', 'Cambodia', 'Cameroon', 'Canada', 'Central African Republic', 'Chad', 'Chile', 'China', 'Colombia', 'Comoros', 'Congo (Congo-Brazzaville)', 'Costa Rica', 'Croatia', 'Cuba', 'Cyprus', 'Czechia (Czech Republic)', 'Democratic Republic of the Congo (Congo-Kinshasa)', 'Denmark', 'Djibouti', 'Dominica', 'Dominican Republic', 'East Timor (Timor-Leste)', 'Ecuador', 'Egypt', 'El Salvador', 'Equatorial Guinea', 'Eritrea', 'Estonia', 'Eswatini', 'Ethiopia', 'Fiji', 'Finland', 'France', 'Gabon', 'Gambia', 'Georgia', 'Germany', 'Ghana', 'Greece', 'Grenada', 'Guatemala', 'Guinea', 'Guinea-Bissau', 'Guyana', 'Haiti', 'Holy See', 'Honduras', 'Hungary', 'Iceland', 'India', 'Indonesia', 'Iran', 'Iraq', 'Ireland', 'Israel', 'Italy', 'Ivory Coast', 'Jamaica', 'Japan', 'Jordan', 'Kazakhstan', 'Kenya', 'Kiribati', 'Kosovo', 'Kuwait', 'Kyrgyzstan', 'Laos', 'Latvia', 'Lebanon', 'Lesotho', 'Liberia', 'Libya', 'Liechtenstein', 'Lithuania', 'Luxembourg', 'Madagascar', 'Malawi', 'Malaysia', 'Maldives', 'Mali', 'Malta', 'Marshall Islands', 'Mauritania', 'Mauritius', 'Mexico', 'Micronesia', 'Moldova', 'Monaco', 'Mongolia', 'Montenegro', 'Morocco', 'Mozambique', 'Myanmar (formerly Burma)', 'Namibia', 'Nauru', 'Nepal', 'Netherlands', 'New Zealand', 'Nicaragua', 'Niger', 'Nigeria', 'North Korea', 'North Macedonia (formerly Macedonia)', 'Norway', 'Oman', 'Pakistan', 'Palau', 'Palestine State', 'Panama', 'Papua New Guinea', 'Paraguay', 'Peru', 'Philippines', 'Poland', 'Portugal', 'Qatar', 'Romania', 'Russia', 'Rwanda', 'Saint Kitts and Nevis', 'Saint Lucia', 'Saint Vincent and the Grenadines', 'Samoa', 'San Marino', 'Sao Tome and Principe', 'Saudi Arabia', 'Senegal', 'Serbia', 'Seychelles', 'Sierra Leone', 'Singapore', 'Slovakia', 'Slovenia', 'Solomon Islands', 'Somalia', 'South Africa', 'South Korea', 'South Sudan', 'Spain', 'Sri Lanka', 'Sudan', 'Suriname', 'Sweden', 'Switzerland', 'Syria', 'Taiwan', 'Tajikistan', 'Tanzania', 'Thailand', 'Togo', 'Tonga', 'Trinidad and Tobago', 'Tunisia', 'Turkey', 'Turkmenistan', 'Tuvalu', 'Uganda', 'Ukraine', 'United Arab Emirates', 'United Kingdom', 'United States of America', 'Uruguay', 'Uzbekistan', 'Vanuatu', 'Venezuela', 'Vietnam', 'Yemen', 'Zambia', 'Zimbabwe'];
 3 | ?>
 4 | 
 5 | <!DOCTYPE html>
 6 | <html lang="en">
 7 | 
 8 | <head>
 9 |     <meta charset="UTF-8">
10 |     <meta name="viewport" content="width=device-width, initial-scale=1.0">
11 |     <title>Country</title>
12 |     <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.0.2/dist/css/bootstrap.min.css" rel="stylesheet"
13 |         integrity="sha384-EVSTQN3/azprG1Anm3QDgpJLIm9Nao0Yz1ztcQTwFspd3yD65VohhpuuCOmLASjC" crossorigin="anonymous">
14 | 
15 | </head>
16 | 
17 | <body>
18 |     <form action="" method="post">
19 |         <div class="center">
20 |             <h1 class="text-center text-warning">All Country List</h1>
21 |             <option class="text-center" value="">
22 |                 <?php
23 |                 foreach ($countries as $value) {
24 |                     echo "$value </br>";
25 | 
26 |                 }
27 |                 ?>
28 |             </option>
29 |         </div>
30 |     </form>
31 | </body>
32 | 
33 | </html>


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/hw/Assignment 2/momen.php:
--------------------------------------------------------------------------------
  1 | <?php
  2 | $countries = [
  3 |     'Afghanistan',
  4 |     'Albania',
  5 |     'Algeria',
  6 |     'Andorra',
  7 |     'Angola',
  8 |     'Antigua and Barbuda',
  9 |     'Argentina',
 10 |     'Armenia',
 11 |     'Australia',
 12 |     'Austria',
 13 |     'Azerbaijan',
 14 |     'Bahamas',
 15 |     'Bahrain',
 16 |     'Bangladesh',
 17 |     'Barbados',
 18 |     'Belarus',
 19 |     'Belgium',
 20 |     'Belize',
 21 |     'Benin',
 22 |     'Bhutan',
 23 |     'Bolivia',
 24 |     'Bosnia and Herzegovina',
 25 |     'Botswana',
 26 |     'Brazil',
 27 |     'Brunei',
 28 |     'Bulgaria',
 29 |     'Burkina Faso',
 30 |     'Burundi',
 31 |     'Cabo Verde',
 32 |     'Cambodia',
 33 |     'Cameroon',
 34 |     'Canada',
 35 |     'Central African Republic',
 36 |     'Chad',
 37 |     'Chile',
 38 |     'China',
 39 |     'Colombia',
 40 |     'Comoros',
 41 |     'Congo (Congo-Brazzaville)',
 42 |     'Costa Rica',
 43 |     'Croatia',
 44 |     'Cuba',
 45 |     'Cyprus',
 46 |     'Czechia (Czech Republic)',
 47 |     'Democratic Republic of the Congo',
 48 |     'Denmark',
 49 |     'Djibouti',
 50 |     'Dominica',
 51 |     'Dominican Republic',
 52 |     'East Timor (Timor-Leste)',
 53 |     'Ecuador',
 54 |     'Egypt',
 55 |     'El Salvador',
 56 |     'Equatorial Guinea',
 57 |     'Eritrea',
 58 |     'Estonia',
 59 |     'Eswatini',
 60 |     'Ethiopia',
 61 |     'Fiji',
 62 |     'Finland',
 63 |     'France',
 64 |     'Gabon',
 65 |     'Gambia',
 66 |     'Georgia',
 67 |     'Germany',
 68 |     'Ghana',
 69 |     'Greece',
 70 |     'Grenada',
 71 |     'Guatemala',
 72 |     'Guinea',
 73 |     'Guinea-Bissau',
 74 |     'Guyana',
 75 |     'Haiti',
 76 |     'Holy See',
 77 |     'Honduras',
 78 |     'Hungary',
 79 |     'Iceland',
 80 |     'India',
 81 |     'Indonesia',
 82 |     'Iran',
 83 |     'Iraq',
 84 |     'Ireland',
 85 |     'Israel',
 86 |     'Italy',
 87 |     'Ivory Coast',
 88 |     'Jamaica',
 89 |     'Japan',
 90 |     'Jordan',
 91 |     'Kazakhstan',
 92 |     'Kenya',
 93 |     'Kiribati',
 94 |     'Kosovo',
 95 |     'Kuwait',
 96 |     'Kyrgyzstan',
 97 |     'Laos',
 98 |     'Latvia',
 99 |     'Lebanon',
100 |     'Lesotho',
101 |     'Liberia',
102 |     'Libya',
103 |     'Liechtenstein',
104 |     'Lithuania',
105 |     'Luxembourg',
106 |     'Madagascar',
107 |     'Malawi',
108 |     'Malaysia',
109 |     'Maldives',
110 |     'Mali',
111 |     'Malta',
112 |     'Marshall Islands',
113 |     'Mauritania',
114 |     'Mauritius',
115 |     'Mexico',
116 |     'Micronesia',
117 |     'Moldova',
118 |     'Monaco',
119 |     'Mongolia',
120 |     'Montenegro',
121 |     'Morocco',
122 |     'Mozambique',
123 |     'Myanmar (formerly Burma)',
124 |     'Namibia',
125 |     'Nauru',
126 |     'Nepal',
127 |     'Netherlands',
128 |     'New Zealand',
129 |     'Nicaragua',
130 |     'Niger',
131 |     'Nigeria',
132 |     'North Korea',
133 |     'North Macedonia (formerly Macedonia)',
134 |     'Norway',
135 |     'Oman',
136 |     'Pakistan',
137 |     'Palau',
138 |     'Palestine State',
139 |     'Panama',
140 |     'Papua New Guinea',
141 |     'Paraguay',
142 |     'Peru',
143 |     'Philippines',
144 |     'Poland',
145 |     'Portugal',
146 |     'Qatar',
147 |     'Romania',
148 |     'Russia',
149 |     'Rwanda',
150 |     'Saint Kitts and Nevis',
151 |     'Saint Lucia',
152 |     'Saint Vincent and the Grenadines',
153 |     'Samoa',
154 |     'San Marino',
155 |     'Sao Tome and Principe',
156 |     'Saudi Arabia',
157 |     'Senegal',
158 |     'Serbia',
159 |     'Seychelles',
160 |     'Sierra Leone',
161 |     'Singapore',
162 |     'Slovakia',
163 |     'Slovenia',
164 |     'Solomon Islands',
165 |     'Somalia',
166 |     'South Africa',
167 |     'South Korea',
168 |     'South Sudan',
169 |     'Spain',
170 |     'Sri Lanka',
171 |     'Sudan',
172 |     'Suriname',
173 |     'Sweden',
174 |     'Switzerland',
175 |     'Syria',
176 |     'Taiwan',
177 |     'Tajikistan',
178 |     'Tanzania',
179 |     'Thailand',
180 |     'Togo',
181 |     'Tonga',
182 |     'Trinidad and Tobago',
183 |     'Tunisia',
184 |     'Turkey',
185 |     'Turkmenistan',
186 |     'Tuvalu',
187 |     'Uganda',
188 |     'Ukraine',
189 |     'United Arab Emirates',
190 |     'United Kingdom',
191 |     'United States of America',
192 |     'Uruguay',
193 |     'Uzbekistan',
194 |     'Vanuatu',
195 |     'Venezuela',
196 |     'Vietnam',
197 |     'Yemen',
198 |     'Zambia',
199 |     'Zimbabwe'
200 | ];
201 | 
202 | ?>
203 | 
204 | <!DOCTYPE html>
205 | <html lang="en">
206 | 
207 | <head>
208 |     <meta charset="UTF-8">
209 |     <meta name="viewport" content="width=device-width, initial-scale=1.0">
210 |     <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.0.2/dist/css/bootstrap.min.css" rel="stylesheet"
211 |         integrity="sha384-EVSTQN3/azprG1Anm3QDgpJLIm9Nao0Yz1ztcQTwFspd3yD65VohhpuuCOmLASjC" crossorigin="anonymous">
212 | 
213 |     <title>HTML Form</title>
214 | 
215 |     <style>
216 |         * {
217 |             margin: 0;
218 |             padding: 0;
219 |             box-sizing: border-box;
220 |         }
221 | 
222 |         .design {
223 |             margin: auto;
224 |             border: 2px solid #198754;
225 |             border-radius: 10px;
226 |         }
227 |     </style>
228 | 
229 | </head>
230 | 
231 | <body style="background: #808080;">
232 | 
233 |     <div class="container">
234 | 
235 |         <div class="row" style="height:100dvh;">
236 | 
237 |             <div class="col-md-5 design bg-dark text-white p-5">
238 | 
239 |                 <form action="" method="GET">
240 |                     <label for="country" class="form-label"> Select A Country:</label>
241 |                     <select name="country" id="country" class="form-control">
242 |                         <option value="">-- Select A Country --</option>
243 | 
244 |                         <?php
245 | 
246 |                         foreach ($countries as $country) {
247 |                             echo "<option value='" . $country . "'>" . $country . "</option>";
248 |                         }
249 | 
250 |                         ?>
251 |                     </select>
252 |                     <input type="submit" value="Submit" class="btn btn-success mt-2">
253 |                 </form>
254 | 
255 |             </div>
256 |         </div>
257 |     </div>
258 | 
259 | 
260 |     <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.0.2/dist/js/bootstrap.bundle.min.js"
261 |         integrity="sha384-MrcW6ZMFYlzcLA8Nl+NtUVF0sA7MsXsP1UyJoMp4YLEuNSfAP+JcXn/tWtIaxVXM"
262 |         crossorigin="anonymous"></script>
263 | 
264 | </body>
265 | 
266 | </html>


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/l8-form-validation.php:
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  1 | <?php
  2 | $cities = [
  3 |     "Bagerhat", "Bandarban", "Barguna", "Barisal", "Bhola", "Bogra", "Brahmanbaria", "Chandpur", "Chapainawabganj", "Chhatak", "Chittagong", "Chuadanga", "Comilla", "Cox's Bazar", "Dhaka", "Dinajpur", "Faridpur", "Feni", "Gaibandha", "Gazipur", "Habiganj", "Jamalpur", "Jessore", "Jhalokati", "Jhenaidah", "Joypurhat", "Khagrachari", "Khulna", "Kishoreganj", "Kurigram", "Kushtia", "Lakshmipur", "Lalmonirhat", "Madaripur", "Magura", "Manikganj", "Meherpur", "Moulvibazar", "Munshiganj", "Mymensingh", "Narail", "Narayanganj", "Narsingdi", "Natore", "Nawabganj", "Netrakona", "Nilphamari", "Noakhali", "Pabna", "Panchagarh", "Patuakhali", "Pirojpur", "Rajbari", "Rajshahi", "Rangamati", "Rangpur", "Satkhira", "Shariatpur", "Sherpur", "Sirajganj", "Sunamganj", "Sylhet", "Tangail", "Thakurgaon"
  4 | ];
  5 | 
  6 | $genders = ["Male", "Female"];
  7 | $allSkills = ["HTML" => null, "CSS" => null, "JS" => null, "PHP" => null, "MySQL" => null];
  8 | function safuda($data)
  9 | {
 10 |     $data = htmlspecialchars($data);
 11 |     $data = trim($data);
 12 |     $data = stripslashes($data);
 13 |     return $data;
 14 | }
 15 | 
 16 | if (isset($_POST["sub123"])) {
 17 |     $name = safuda($_POST["name"]);
 18 |     $email = safuda($_POST["email"]);
 19 |     $gender = safuda($_POST["gender"] ?? null);
 20 |     $skills = $_POST["skills"] ?? null;
 21 |     $city = safuda($_POST["city"]) ?? null;
 22 | 
 23 |     if (empty($name)) {
 24 |         $errName = "Name is required";
 25 |     } elseif (!preg_match("/^[A-Za-z. ]*$/", $name)) {
 26 |         $errName = "Invalid name format";
 27 |     } else {
 28 |         $crrName = $name;
 29 |     }
 30 | 
 31 |     if (empty($email)) {
 32 |         $errEmail = "Email is required";
 33 |     } elseif (!filter_var($email, FILTER_VALIDATE_EMAIL)) {
 34 |         $errEmail = "Invalid email format";
 35 |     } else {
 36 |         $crrEmail = $email;
 37 |     }
 38 | 
 39 |     if (empty($gender)) {
 40 |         $errGender = "Please select your gender";
 41 |     } elseif (!in_array($gender, $genders)) {
 42 |         $errGender = "Paknami bondho korun!";
 43 |     } else {
 44 |         $crrGender = $gender;
 45 |     }
 46 | 
 47 |     if (empty($skills)) {
 48 |         $errSkills = "Please select your skills";
 49 |     } else {
 50 |         $crrSkills = $skills;
 51 |         foreach ($skills as $skill) {
 52 |             $allSkills[$skill] = "checked";
 53 |         }
 54 |     }
 55 | 
 56 |     if (empty($city)) {
 57 |         $errCity = "Please select your city";
 58 |     } elseif (!in_array($city, $cities)) {
 59 |         $errCity = "Paknami bondho korun!";
 60 |     } else {
 61 |         $crrCity = $city;
 62 |     }
 63 | }
 64 | 
 65 | 
 66 | 
 67 | ?>
 68 | <!DOCTYPE html>
 69 | <html lang="en">
 70 | 
 71 | <head>
 72 |     <meta charset="UTF-8">
 73 |     <meta name="viewport" content="width=device-width, initial-scale=1.0">
 74 |     <title>Document</title>
 75 |     <!-- bootstrap 5.3 css link -->
 76 |     <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/bootstrap/5.1.3/css/bootstrap.min.css">
 77 | </head>
 78 | 
 79 | <body>
 80 |     <div class="container">
 81 |         <div class="row min-vh-100 d-flex ">
 82 |             <div class="col-md-5 p-4 border rounded shadow m-auto">
 83 |                 <form action="" method="post">
 84 |                     <h2 class="">Registration Form</h2>
 85 |                     <div class="form-floating ">
 86 |                         <input type="text" class="form-control border-0 border-bottom rounded-0 shadow-none <?= isset($crrName) ? 'is-valid' : null ?> <?= isset($errName) ? 'is-invalid' : null ?> " placeholder="Your name" name="name" value="<?= $name ?? null ?>">
 87 |                         <label for="" class="form-label">Your name</label>
 88 |                         <div class="valid-feedback">
 89 |                             <?= isset($crrName) ? "Name is Okay" : null ?>
 90 |                         </div>
 91 |                         <div class="invalid-feedback">
 92 |                             <?= $errName ?>
 93 |                         </div>
 94 |                     </div>
 95 |                     <div class="mb-3 form-floating ">
 96 |                         <input type="text" class="form-control border-0 border-bottom rounded-0 shadow-none <?= isset($crrEmail) ? 'is-valid' : null ?> <?= isset($errEmail) ? 'is-invalid' : null ?>" placeholder="Your email" name="email" value="<?= $email ?? null ?>">
 97 |                         <label for="" class="form-label">Your email</label>
 98 |                         <div class="valid-feedback">
 99 |                             <?= isset($crrEmail) ? "Email is okay" : null ?>
100 |                         </div>
101 |                         <div class="invalid-feedback">
102 |                             <?= $errEmail ?>
103 |                         </div>
104 |                     </div>
105 |                     <div class="mb-3 border-bottom pb-2">
106 |                         <div class="mb-2">
107 |                             <label for="" class="form-check-label">
108 |                                 Gender :
109 |                             </label>
110 |                         </div>
111 |                         <div class="<?= isset($errGender) ? 'is-invalid' : null ?>">
112 |                             <div class="form-check-inline">
113 |                                 <label for="" class="form-check-label ">
114 |                                     <input type="radio" class="form-check-input" value="Male" name="gender" <?= isset($gender) && $gender === "Male" ? 'checked' : null  ?>> Male
115 |                                 </label>
116 |                             </div>
117 |                             <div class="form-check-inline">
118 |                                 <label for="" class="form-check-label ">
119 |                                     <input type="radio" class="form-check-input" value="Female" name="gender" <?= isset($gender) && $gender === "Female" ? 'checked' : null  ?>> Female
120 |                                 </label>
121 |                             </div>
122 |                         </div>
123 |                         <div class="invalid-feedback">
124 |                             <?= $errGender ?>
125 |                         </div>
126 |                     </div>
127 |                     <div class="mb-3 border-bottom pb-2">
128 |                         <div class="mb-2">
129 |                             <label for="" class="form-check-label">
130 |                                 Skills :
131 |                             </label>
132 |                         </div>
133 |                         <div class="<?= isset($errSkills) ? 'is-invalid' : null ?>">
134 |                             <div class="form-check-inline">
135 |                                 <label for="" class="form-check-label ">
136 |                                     <input type="checkbox" class="form-check-input" value="HTML" name="skills[]" <?= $allSkills["HTML"] ?>> HTML
137 |                                 </label>
138 |                             </div>
139 |                             <div class="form-check-inline">
140 |                                 <label for="" class="form-check-label ">
141 |                                     <input type="checkbox" class="form-check-input" value="CSS" name="skills[]" <?= $allSkills["CSS"] ?>> CSS
142 |                                 </label>
143 |                             </div>
144 |                             <div class="form-check-inline">
145 |                                 <label for="" class="form-check-label ">
146 |                                     <input type="checkbox" class="form-check-input" value="JS" name="skills[]" <?= $allSkills["JS"] ?>> JS
147 |                                 </label>
148 |                             </div>
149 |                             <div class="form-check-inline">
150 |                                 <label for="" class="form-check-label ">
151 |                                     <input type="checkbox" class="form-check-input" value="PHP" name="skills[]" <?= $allSkills["PHP"] ?>> PHP
152 |                                 </label>
153 |                             </div>
154 |                             <div class="form-check-inline">
155 |                                 <label for="" class="form-check-label ">
156 |                                     <input type="checkbox" class="form-check-input" value="MySQL" name="skills[]"> MySQL
157 |                                 </label>
158 |                             </div>
159 |                         </div>
160 |                         <div class="invalid-feedback">
161 |                             <?= $errSkills ?>
162 |                         </div>
163 |                     </div>
164 |                     <div class="border-bottom pb-3">
165 |                         <select name="city" id="" class="form-select <?= isset($errCity) ? "is-invalid" : null ?>">
166 |                             <option value="">--Select City--</option>
167 |                             <?php foreach ($cities as $ct) {  ?>
168 |                                 <option value="<?= $ct ?>" <?= $city === $ct ? "selected" : null ?>><?= $ct ?></option>
169 |                             <?php } ?>
170 |                         </select>
171 |                         <div class="invalid-feedback">
172 |                             <?= $errCity ?>
173 |                         </div>
174 |                     </div>
175 |                     <div class="form-floating ">
176 |                         <input type="password" class="form-control border-0 border-bottom rounded-0 shadow-none" placeholder="Password" name="pass">
177 |                         <label for="" class="form-label">Password</label>
178 |                     </div>
179 |                     <div class="form-floating mb-3">
180 |                         <input type="password" class="form-control border-0 border-bottom rounded-0 shadow-none" placeholder="Confirm Password" name="cpass">
181 |                         <label for="" class="form-label">Confirm Password</label>
182 |                     </div>
183 |                     <div>
184 |                         <input type="submit" value="Sign up" class="btn btn-primary" name="sub123">
185 |                     </div>
186 |                 </form>
187 |             </div>
188 |         </div>
189 |     </div>
190 | 
191 |     <!-- bootstrap 5 bundle js link -->
192 |     <script src="https://cdnjs.cloudflare.com/ajax/libs/bootstrap/5.1.3/js/bootstrap.bundle.min.js"></script>
193 | </body>
194 | 
195 | </html>


--------------------------------------------------------------------------------
/authentication/l8-form-validation.php:
--------------------------------------------------------------------------------
  1 | <?php
  2 | $cities = [
  3 |     "Bagerhat", "Bandarban", "Barguna", "Barisal", "Bhola", "Bogra", "Brahmanbaria", "Chandpur", "Chapainawabganj", "Chhatak", "Chittagong", "Chuadanga", "Comilla", "Cox's Bazar", "Dhaka", "Dinajpur", "Faridpur", "Feni", "Gaibandha", "Gazipur", "Habiganj", "Jamalpur", "Jessore", "Jhalokati", "Jhenaidah", "Joypurhat", "Khagrachari", "Khulna", "Kishoreganj", "Kurigram", "Kushtia", "Lakshmipur", "Lalmonirhat", "Madaripur", "Magura", "Manikganj", "Meherpur", "Moulvibazar", "Munshiganj", "Mymensingh", "Narail", "Narayanganj", "Narsingdi", "Natore", "Nawabganj", "Netrakona", "Nilphamari", "Noakhali", "Pabna", "Panchagarh", "Patuakhali", "Pirojpur", "Rajbari", "Rajshahi", "Rangamati", "Rangpur", "Satkhira", "Shariatpur", "Sherpur", "Sirajganj", "Sunamganj", "Sylhet", "Tangail", "Thakurgaon"
  4 | ];
  5 | 
  6 | $genders = ["Male", "Female"];
  7 | $allSkills = ["HTML" => null, "CSS" => null, "JS" => null, "PHP" => null, "MySQL" => null];
  8 | function safuda($data)
  9 | {
 10 |     $data = htmlspecialchars($data);
 11 |     $data = trim($data);
 12 |     $data = stripslashes($data);
 13 |     return $data;
 14 | }
 15 | 
 16 | if (isset($_POST["sub123"])) {
 17 |     $name = safuda($_POST["name"]);
 18 |     $email = safuda($_POST["email"]);
 19 |     $gender = safuda($_POST["gender"] ?? null);
 20 |     $skills = $_POST["skills"] ?? null;
 21 |     $city = safuda($_POST["city"]) ?? null;
 22 | 
 23 |     if (empty($name)) {
 24 |         $errName = "Name is required";
 25 |     } elseif (!preg_match("/^[A-Za-z. ]*$/", $name)) {
 26 |         $errName = "Invalid name format";
 27 |     } else {
 28 |         $crrName = $name;
 29 |     }
 30 | 
 31 |     if (empty($email)) {
 32 |         $errEmail = "Email is required";
 33 |     } elseif (!filter_var($email, FILTER_VALIDATE_EMAIL)) {
 34 |         $errEmail = "Invalid email format";
 35 |     } else {
 36 |         $crrEmail = $email;
 37 |     }
 38 | 
 39 |     if (empty($gender)) {
 40 |         $errGender = "Please select your gender";
 41 |     } elseif (!in_array($gender, $genders)) {
 42 |         $errGender = "Paknami bondho korun!";
 43 |     } else {
 44 |         $crrGender = $gender;
 45 |     }
 46 | 
 47 |     if (empty($skills)) {
 48 |         $errSkills = "Please select your skills";
 49 |     } else {
 50 |         $crrSkills = $skills;
 51 |         foreach ($skills as $skill) {
 52 |             $allSkills[$skill] = "checked";
 53 |         }
 54 |     }
 55 | 
 56 |     if (empty($city)) {
 57 |         $errCity = "Please select your city";
 58 |     } elseif (!in_array($city, $cities)) {
 59 |         $errCity = "Paknami bondho korun!";
 60 |     } else {
 61 |         $crrCity = $city;
 62 |     }
 63 | }
 64 | 
 65 | 
 66 | 
 67 | ?>
 68 | <!DOCTYPE html>
 69 | <html lang="en">
 70 | 
 71 | <head>
 72 |     <meta charset="UTF-8">
 73 |     <meta name="viewport" content="width=device-width, initial-scale=1.0">
 74 |     <title>Document</title>
 75 |     <!-- bootstrap 5.3 css link -->
 76 |     <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/bootstrap/5.1.3/css/bootstrap.min.css">
 77 | </head>
 78 | 
 79 | <body>
 80 |     <div class="container">
 81 |         <div class="row min-vh-100 d-flex ">
 82 |             <div class="col-md-5 p-4 border rounded shadow m-auto">
 83 |                 <form action="" method="post">
 84 |                     <h2 class="">Registration Form</h2>
 85 |                     <div class="form-floating ">
 86 |                         <input type="text" class="form-control border-0 border-bottom rounded-0 shadow-none <?= isset($crrName) ? 'is-valid' : null ?> <?= isset($errName) ? 'is-invalid' : null ?> " placeholder="Your name" name="name" value="<?= $name ?? null ?>">
 87 |                         <label for="" class="form-label">Your name</label>
 88 |                         <div class="valid-feedback">
 89 |                             <?= isset($crrName) ? "Name is Okay" : null ?>
 90 |                         </div>
 91 |                         <div class="invalid-feedback">
 92 |                             <?= $errName ?>
 93 |                         </div>
 94 |                     </div>
 95 |                     <div class="mb-3 form-floating ">
 96 |                         <input type="text" class="form-control border-0 border-bottom rounded-0 shadow-none <?= isset($crrEmail) ? 'is-valid' : null ?> <?= isset($errEmail) ? 'is-invalid' : null ?>" placeholder="Your email" name="email" value="<?= $email ?? null ?>">
 97 |                         <label for="" class="form-label">Your email</label>
 98 |                         <div class="valid-feedback">
 99 |                             <?= isset($crrEmail) ? "Email is okay" : null ?>
100 |                         </div>
101 |                         <div class="invalid-feedback">
102 |                             <?= $errEmail ?>
103 |                         </div>
104 |                     </div>
105 |                     <div class="mb-3 border-bottom pb-2">
106 |                         <div class="mb-2">
107 |                             <label for="" class="form-check-label">
108 |                                 Gender :
109 |                             </label>
110 |                         </div>
111 |                         <div class="<?= isset($errGender) ? 'is-invalid' : null ?>">
112 |                             <div class="form-check-inline">
113 |                                 <label for="" class="form-check-label ">
114 |                                     <input type="radio" class="form-check-input" value="Male" name="gender" <?= isset($gender) && $gender === "Male" ? 'checked' : null  ?>> Male
115 |                                 </label>
116 |                             </div>
117 |                             <div class="form-check-inline">
118 |                                 <label for="" class="form-check-label ">
119 |                                     <input type="radio" class="form-check-input" value="Female" name="gender" <?= isset($gender) && $gender === "Female" ? 'checked' : null  ?>> Female
120 |                                 </label>
121 |                             </div>
122 |                         </div>
123 |                         <div class="invalid-feedback">
124 |                             <?= $errGender ?>
125 |                         </div>
126 |                     </div>
127 |                     <div class="mb-3 border-bottom pb-2">
128 |                         <div class="mb-2">
129 |                             <label for="" class="form-check-label">
130 |                                 Skills :
131 |                             </label>
132 |                         </div>
133 |                         <div class="<?= isset($errSkills) ? 'is-invalid' : null ?>">
134 |                             <div class="form-check-inline">
135 |                                 <label for="" class="form-check-label ">
136 |                                     <input type="checkbox" class="form-check-input" value="HTML" name="skills[]" <?= $allSkills["HTML"] ?>> HTML
137 |                                 </label>
138 |                             </div>
139 |                             <div class="form-check-inline">
140 |                                 <label for="" class="form-check-label ">
141 |                                     <input type="checkbox" class="form-check-input" value="CSS" name="skills[]" <?= $allSkills["CSS"] ?>> CSS
142 |                                 </label>
143 |                             </div>
144 |                             <div class="form-check-inline">
145 |                                 <label for="" class="form-check-label ">
146 |                                     <input type="checkbox" class="form-check-input" value="JS" name="skills[]" <?= $allSkills["JS"] ?>> JS
147 |                                 </label>
148 |                             </div>
149 |                             <div class="form-check-inline">
150 |                                 <label for="" class="form-check-label ">
151 |                                     <input type="checkbox" class="form-check-input" value="PHP" name="skills[]" <?= $allSkills["PHP"] ?>> PHP
152 |                                 </label>
153 |                             </div>
154 |                             <div class="form-check-inline">
155 |                                 <label for="" class="form-check-label ">
156 |                                     <input type="checkbox" class="form-check-input" value="MySQL" name="skills[]"> MySQL
157 |                                 </label>
158 |                             </div>
159 |                         </div>
160 |                         <div class="invalid-feedback">
161 |                             <?= $errSkills ?>
162 |                         </div>
163 |                     </div>
164 |                     <div class="border-bottom pb-3">
165 |                         <select name="city" id="" class="form-select <?= isset($errCity) ? "is-invalid" : null ?>">
166 |                             <option value="">--Select City--</option>
167 |                             <?php foreach ($cities as $ct) {  ?>
168 |                                 <option value="<?= $ct ?>" <?= $city === $ct ? "selected" : null ?>><?= $ct ?></option>
169 |                             <?php } ?>
170 |                         </select>
171 |                         <div class="invalid-feedback">
172 |                             <?= $errCity ?>
173 |                         </div>
174 |                     </div>
175 |                     <div class="form-floating ">
176 |                         <input type="password" class="form-control border-0 border-bottom rounded-0 shadow-none" placeholder="Password" name="pass">
177 |                         <label for="" class="form-label">Password</label>
178 |                     </div>
179 |                     <div class="form-floating mb-3">
180 |                         <input type="password" class="form-control border-0 border-bottom rounded-0 shadow-none" placeholder="Confirm Password" name="cpass">
181 |                         <label for="" class="form-label">Confirm Password</label>
182 |                     </div>
183 |                     <div>
184 |                         <input type="submit" value="Sign up" class="btn btn-primary" name="sub123">
185 |                     </div>
186 |                 </form>
187 |             </div>
188 |         </div>
189 |     </div>
190 | 
191 |     <!-- bootstrap 5 bundle js link -->
192 |     <script src="https://cdnjs.cloudflare.com/ajax/libs/bootstrap/5.1.3/js/bootstrap.bundle.min.js"></script>
193 | </body>
194 | 
195 | </html>


--------------------------------------------------------------------------------
/authentication/signup.php:
--------------------------------------------------------------------------------
  1 | <?php
  2 | include_once("./header.php");
  3 | $cities = [
  4 |     "Bagerhat", "Bandarban", "Barguna", "Barisal", "Bhola", "Bogra", "Brahmanbaria", "Chandpur", "Chapainawabganj", "Chhatak", "Chittagong", "Chuadanga", "Comilla", "Cox's Bazar", "Dhaka", "Dinajpur", "Faridpur", "Feni", "Gaibandha", "Gazipur", "Habiganj", "Jamalpur", "Jessore", "Jhalokati", "Jhenaidah", "Joypurhat", "Khagrachari", "Khulna", "Kishoreganj", "Kurigram", "Kushtia", "Lakshmipur", "Lalmonirhat", "Madaripur", "Magura", "Manikganj", "Meherpur", "Moulvibazar", "Munshiganj", "Mymensingh", "Narail", "Narayanganj", "Narsingdi", "Natore", "Nawabganj", "Netrakona", "Nilphamari", "Noakhali", "Pabna", "Panchagarh", "Patuakhali", "Pirojpur", "Rajbari", "Rajshahi", "Rangamati", "Rangpur", "Satkhira", "Shariatpur", "Sherpur", "Sirajganj", "Sunamganj", "Sylhet", "Tangail", "Thakurgaon"
  5 | ];
  6 | 
  7 | $genders = ["Male", "Female"];
  8 | $allSkills = ["HTML" => null, "CSS" => null, "JS" => null, "PHP" => null, "MySQL" => null];
  9 | function safuda($data)
 10 | {
 11 |     $data = htmlspecialchars($data);
 12 |     $data = trim($data);
 13 |     $data = stripslashes($data);
 14 |     return $data;
 15 | }
 16 | 
 17 | if (isset($_POST["sub123"])) {
 18 |     $name = safuda($_POST["name"]);
 19 |     $email = safuda($_POST["email"]);
 20 |     $gender = safuda($_POST["gender"] ?? null);
 21 |     $skills = $_POST["skills"] ?? null;
 22 |     $city = safuda($_POST["city"]) ?? null;
 23 |     $password = safuda($_POST["pass"]);
 24 |     $confirmPassword = safuda($_POST["cpass"]);
 25 | 
 26 |     if (empty($name)) {
 27 |         $errName = "Name is required";
 28 |     } elseif (!preg_match("/^[A-Za-z. ]*$/", $name)) {
 29 |         $errName = "Invalid name format";
 30 |     } else {
 31 |         $crrName = $conn->real_escape_string($name);
 32 |     }
 33 | 
 34 |     if (empty($email)) {
 35 |         $errEmail = "Email is required";
 36 |     } elseif (!filter_var($email, FILTER_VALIDATE_EMAIL)) {
 37 |         $errEmail = "Invalid email format";
 38 |     } else {
 39 |         $checkEmail = "SELECT * FROM `users` WHERE `email` = '$email'";
 40 |         $check = $conn->query($checkEmail);
 41 |         if ($check->num_rows > 0) {
 42 |             $errEmail = "Email already exists";
 43 |         }else{
 44 |             $crrEmail = $conn->real_escape_string($email);
 45 |         }
 46 |     }
 47 | 
 48 |     if (empty($gender)) {
 49 |         $errGender = "Please select your gender";
 50 |     } elseif (!in_array($gender, $genders)) {
 51 |         $errGender = "Paknami bondho korun!";
 52 |     } else {
 53 |         $crrGender = $conn->real_escape_string($gender);
 54 |     }
 55 | 
 56 |     if (empty($skills)) {
 57 |         $errSkills = "Please select your skills";
 58 |     } else {
 59 |         $crrSkills = $skills;
 60 |         foreach ($skills as $skill) {
 61 |             $allSkills[$skill] = "checked";
 62 |         }
 63 |         $crrSkills = implode(", ", $crrSkills);
 64 |         $crrSkills = $conn->real_escape_string($crrSkills);
 65 |     }
 66 | 
 67 |     if (empty($city)) {
 68 |         $errCity = "Please select your city";
 69 |     } elseif (!in_array($city, $cities)) {
 70 |         $errCity = "Paknami bondho korun!";
 71 |     } else {
 72 |         $crrCity = $conn->real_escape_string($city);
 73 |     }
 74 | 
 75 |     if (empty($password)) {
 76 |         $errPassword = "Password is required";
 77 |     } elseif (strlen($password) < 8) {
 78 |         $errPassword = "Password must be at least 8 characters long";
 79 |     } elseif ($password !== $confirmPassword) {
 80 |         $errPassword = "Passwords do not match";
 81 |     } else {
 82 |         $hashedPassword = password_hash($password, PASSWORD_DEFAULT);
 83 |         $crrPassword = $conn->real_escape_string($hashedPassword);
 84 |     }
 85 | 
 86 |     if (isset($crrName) && isset($crrEmail) && isset($crrGender) && isset($crrSkills) && isset($crrCity) && isset($crrPassword)) {
 87 |         $insert_query = "INSERT INTO `users`( `name`, `email`, `gender`, `skills`, `pass`) VALUES ('$crrName','$crrEmail','$crrGender','$crrSkills','$crrPassword')";
 88 |         $insert = $conn->query($insert_query);
 89 |         if ($insert) {
 90 |             // toastr succes alert
 91 |             echo "<script>toastr.success('Registration successful');setTimeout(()=>{location.href = './login.php'}, 2000)</script>";
 92 |         } else {
 93 |             echo "<script>toastr.error('Registration failed')</script>";
 94 |         }
 95 |     }
 96 | 
 97 | }
 98 | ?>
 99 | <div class="container mt-5">
100 |     <div class="row d-flex z-0 ">
101 |         <div class="col-md-5 p-4 border rounded shadow m-auto ">
102 |             <form action="" method="post">
103 |                 <h2 class="">Registration Form</h2>
104 |                 <div class="form-floating ">
105 |                     <input type="text" class="form-control border-0 border-bottom rounded-0 shadow-none <?= isset($crrName) ? 'is-valid' : null ?> <?= isset($errName) ? 'is-invalid' : null ?> " placeholder="Your name" name="name" value="<?= $name ?? null ?>">
106 |                     <label for="" class="form-label">Your name</label>
107 |                     <div class="valid-feedback">
108 |                         <?= isset($crrName) ? "Name is Okay" : null ?>
109 |                     </div>
110 |                     <div class="invalid-feedback">
111 |                         <?= $errName ?>
112 |                     </div>
113 |                 </div>
114 |                 <div class="mb-3 form-floating ">
115 |                     <input type="text" class="form-control border-0 border-bottom rounded-0 shadow-none <?= isset($crrEmail) ? 'is-valid' : null ?> <?= isset($errEmail) ? 'is-invalid' : null ?>" placeholder="Your email" name="email" value="<?= $email ?? null ?>">
116 |                     <label for="" class="form-label">Your email</label>
117 |                     <div class="valid-feedback">
118 |                         <?= isset($crrEmail) ? "Email is okay" : null ?>
119 |                     </div>
120 |                     <div class="invalid-feedback">
121 |                         <?= $errEmail ?>
122 |                     </div>
123 |                 </div>
124 |                 <div class="mb-3 border-bottom pb-2">
125 |                     <div class="mb-2">
126 |                         <label for="" class="form-check-label">
127 |                             Gender :
128 |                         </label>
129 |                     </div>
130 |                     <div class="<?= isset($errGender) ? 'is-invalid' : null ?>">
131 |                         <div class="form-check-inline">
132 |                             <label for="" class="form-check-label ">
133 |                                 <input type="radio" class="form-check-input" value="Male" name="gender" <?= isset($gender) && $gender === "Male" ? 'checked' : null  ?>> Male
134 |                             </label>
135 |                         </div>
136 |                         <div class="form-check-inline">
137 |                             <label for="" class="form-check-label ">
138 |                                 <input type="radio" class="form-check-input" value="Female" name="gender" <?= isset($gender) && $gender === "Female" ? 'checked' : null  ?>> Female
139 |                             </label>
140 |                         </div>
141 |                     </div>
142 |                     <div class="invalid-feedback">
143 |                         <?= $errGender ?>
144 |                     </div>
145 |                 </div>
146 |                 <div class="mb-3 border-bottom pb-2">
147 |                     <div class="mb-2">
148 |                         <label for="" class="form-check-label">
149 |                             Skills :
150 |                         </label>
151 |                     </div>
152 |                     <div class="<?= isset($errSkills) ? 'is-invalid' : null ?>">
153 |                         <div class="form-check-inline">
154 |                             <label for="" class="form-check-label ">
155 |                                 <input type="checkbox" class="form-check-input" value="HTML" name="skills[]" <?= $allSkills["HTML"] ?>> HTML
156 |                             </label>
157 |                         </div>
158 |                         <div class="form-check-inline">
159 |                             <label for="" class="form-check-label ">
160 |                                 <input type="checkbox" class="form-check-input" value="CSS" name="skills[]" <?= $allSkills["CSS"] ?>> CSS
161 |                             </label>
162 |                         </div>
163 |                         <div class="form-check-inline">
164 |                             <label for="" class="form-check-label ">
165 |                                 <input type="checkbox" class="form-check-input" value="JS" name="skills[]" <?= $allSkills["JS"] ?>> JS
166 |                             </label>
167 |                         </div>
168 |                         <div class="form-check-inline">
169 |                             <label for="" class="form-check-label ">
170 |                                 <input type="checkbox" class="form-check-input" value="PHP" name="skills[]" <?= $allSkills["PHP"] ?>> PHP
171 |                             </label>
172 |                         </div>
173 |                         <div class="form-check-inline">
174 |                             <label for="" class="form-check-label ">
175 |                                 <input type="checkbox" class="form-check-input" value="MySQL" name="skills[]"> MySQL
176 |                             </label>
177 |                         </div>
178 |                     </div>
179 |                     <div class="invalid-feedback">
180 |                         <?= $errSkills ?>
181 |                     </div>
182 |                 </div>
183 |                 <div class="border-bottom pb-3">
184 |                     <select name="city" id="" class="form-select <?= isset($errCity) ? "is-invalid" : null ?>">
185 |                         <option value="">--Select City--</option>
186 |                         <?php foreach ($cities as $ct) {  ?>
187 |                             <option value="<?= $ct ?>" <?= isset($city) && $city === $ct ? "selected" : null ?>><?= $ct ?></option>
188 |                         <?php } ?>
189 |                     </select>
190 |                     <div class="invalid-feedback">
191 |                         <?= $errCity ?>
192 |                     </div>
193 |                 </div>
194 |                 <div class="form-floating ">
195 |                     <input type="password" class="form-control border-0 border-bottom rounded-0 shadow-none <?= isset($errPassword) ? 'is-invalid' : null ?>" placeholder="Password" name="pass">
196 |                     <label for="" class="form-label">Password</label>
197 |                     <div class="invalid-feedback">
198 |                         <?= $errPassword ?>
199 |                     </div>
200 |                 </div>
201 | 
202 |                 <div class="form-floating mb-3">
203 |                     <input type="password" class="form-control border-0 border-bottom rounded-0 shadow-none" placeholder="Confirm Password" name="cpass">
204 |                     <label for="" class="form-label">Confirm Password</label>
205 |                 </div>
206 |                 <div>
207 |                     <input type="submit" value="Sign up" class="btn btn-primary" name="sub123">
208 |                 </div>
209 |             </form>
210 |         </div>
211 |     </div>
212 | </div>
213 | <?php
214 | include_once("./footer.php");
215 | ?>


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