├── LICENCE
├── README.md
├── embedded_chat_demo.php
├── full_page_chat_demo.php
├── index.php
├── simple_chat
    ├── .htaccess
    ├── chat.php
    ├── css
    │   ├── chat_emb.css
    │   ├── chat_full.css
    │   └── chat_global.css
    ├── includes
    │   ├── chat_func.php
    │   ├── core_func.php
    │   ├── dbconnect.php
    │   ├── markup_func.php
    │   └── validation_func.php
    ├── index.php
    ├── init_chat.php
    ├── js
    │   └── chat.js
    ├── login.php
    ├── login_form.php
    ├── logout.php
    ├── media
    │   └── smilies
    │   │   ├── biggrin.gif
    │   │   ├── cool.gif
    │   │   ├── mellow.gif
    │   │   ├── ohmy.gif
    │   │   ├── sad.gif
    │   │   ├── smile.gif
    │   │   ├── tongue.gif
    │   │   └── wink.gif
    ├── recaptcha
    │   ├── LICENSE
    │   └── recaptchalib.php
    ├── register.php
    └── register_form.php
└── sql
    └── simple_chat.sql


/LICENCE:
--------------------------------------------------------------------------------
 1 | The MIT License (MIT)
 2 | 
 3 | Copyright (c) 2013 Manolis Agkopian
 4 | 
 5 | Permission is hereby granted, free of charge, to any person obtaining a copy of
 6 | this software and associated documentation files (the "Software"), to deal in
 7 | the Software without restriction, including without limitation the rights to
 8 | use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
 9 | the Software, and to permit persons to whom the Software is furnished to do so,
10 | subject to the following conditions:
11 | 
12 | The above copyright notice and this permission notice shall be included in all
13 | copies or substantial portions of the Software.
14 | 
15 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 | IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
17 | FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
18 | COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
19 | IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
20 | CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
21 | 


--------------------------------------------------------------------------------
/README.md:
--------------------------------------------------------------------------------
 1 | ## Description:</h3>
 2 | This is the **Simple Chat ;)**, a simple AJAX chat application written in PHP and Javascript with jQuery.
 3 | 
 4 | The **Simple Chat ;)** comes in two different versions. The first, is the full-page version, where the chat window is placed inside your page content. The second is the embedded version, where the chat window is placed on a position-fixed bar, on the down-right side of the browser window. In the embedded version you can hide or show the chat window. A live demo of the **Simple Chat ;)** in both versions is available [here](http://magkopian.tk/simple-chat/).
 5 | 
 6 | ## How to Use:
 7 | To use the full page version of this chat application, please follow the steps that appear as comments inside the **full_page_chat_demo.php** file. To use the embedded version, follow the steps inside the **embedded_chat_demo.php** file.
 8 | 
 9 | The **Simple Chat ;)** includes a basic register-login system. If your website already has a register-login system you have to modify the **init_chat.php** file. You have to replace the line `header('Location: simple_chat/login_form.php');` with a redirect to your own login page, also after a succesful login you have to set the `$_SESSION['uid']` variable with the id of the user.
10 | 
11 | If you use the included login-register system you have to sign up for a Google's <a href="http://www.google.com/recaptcha/whyrecaptcha" target="_blank">reCAPTCHA</a> account in order to get an API key for the reCAPTCHA service and use it. After you get the API key modify the line `$privatekey = 'xxxxxxxxxxxxxxxxxxxx';` inside the function **validate_recaptcha** inside the file **validation_func.php** and the line `$publickey = 'xxxxxxxxxxxxxxxxxxxx'.'&amp;hl=en';` inside the function **do_html_register_form** inside the file **markup_func.php**. If you don't want the reCAPTCHA at all, just remove the reCAPTCHA validation check inside the **register.php** script and modify the function **do_html_register_form** inside the **markup_func.php** file so it wont appear in the login form. Lastly for security reasons before you register any user, replace the salt string inside the **validate_password** function in the **validation_func.php** file.
12 | 
13 | ## Database Setup:
14 | 
15 | First inside your database you must have two tables. One named `message` and one named `user`. 
16 | 
17 | To create the `message` table run the following query:
18 | 
19 | ```MYSQL
20 | CREATE TABLE IF NOT EXISTS `message` (
21 |   `mid` int(10) unsigned NOT NULL AUTO_INCREMENT,
22 |   `content` varchar(255) DEFAULT NULL,
23 |   `uid` int(10) unsigned NOT NULL,
24 |   `time` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP,
25 |   PRIMARY KEY (`mid`),
26 |   KEY `uid` (`uid`)
27 | ) ENGINE=InnoDB  DEFAULT CHARSET=utf8 AUTO_INCREMENT=1 ;
28 | ```
29 | 
30 | To create `user` table run the following queries:
31 | 
32 | ```MYSQL
33 | CREATE TABLE IF NOT EXISTS `user` (
34 |   `uid` int(10) unsigned NOT NULL AUTO_INCREMENT,
35 |   `uname` varchar(25) NOT NULL,
36 |   `passwd` varchar(64) NOT NULL,
37 |   PRIMARY KEY (`uid`),
38 |   UNIQUE KEY `uname` (`uname`),
39 |   KEY `passwd` (`passwd`)
40 | ) ENGINE=InnoDB  DEFAULT CHARSET=utf8 AUTO_INCREMENT=1 ;
41 | 
42 | 
43 | ALTER TABLE `message`
44 |   ADD CONSTRAINT `message_ibfk_1` FOREIGN KEY (`uid`) REFERENCES `user` (`uid`);
45 | ```
46 | 
47 | You can also just insert the **simple_chat.sql** file in your database.
48 | 
49 | If you use your own login system and you have already a table with users but not named `user` the easier way to get around this, is to modify the file **chat_func.php**, and replace the `user` table name, with the one that you use, on the following lines: 
50 | 
51 | ```PHP
52 | $query = 'SELECT `mid`, `uname`, `content`, `time` FROM `user` INNER JOIN `message` ON `message`.`uid` = `user`.`uid` ORDER BY `time` DESC';
53 | 
54 | $query = "SELECT `mid`, `uname`, `content`, `time` FROM `user` INNER JOIN `message` ON `message`.`uid` = `user`.`uid` WHERE `time` > '$timestamp'";
55 | ```
56 | 	
57 | Also you have to make sure that the table has all the needed fields in the correct format, except the `passwd` field that is handled by your own login-register scripts. If for some reason this is impossible to do, the only way is to create a second table named `user` with all the needed fields and make a duplicate of your users there, you have also to modify your registration script in order for it to register your users on both tables.
58 | 
59 | If now your user table is named `user` you just have to make sure that it has the needed fields. If it doesn't, and also impossible to alter, the only way is ether to create a second database for the whole application and duplicate your users inside the `user` table, or create a table for the users with an other name within the same database and duplicate your user there. In the last case don't forget to modify the queries inside **chat_func.php**.
60 | 
61 | Lastly but not least you have to modify the line `$con = @mysqli_connect('hostname', 'username', 'password', 'dbname');` inside the dbconnect.php file to match your own database setup.
62 | 
63 | ## Licensing
64 | 
65 | My code is licensed under the MIT Licence, please check the LICENCE file for copying permission. Please note that I do not own any of the code inside the recaptchalib.php file, please check the LICENSE file inside the /simple_chat/recaptcha directory. Also I do not own any of the smileys inside the smileys folder. All the smileys are provided free by [freesmileys.org](http://www.freesmileys.org).
66 | 


--------------------------------------------------------------------------------
/embedded_chat_demo.php:
--------------------------------------------------------------------------------
  1 | <?php
  2 | /**********************************************\
  3 | * Copyright (c) 2013 Manolis Agkopian          *
  4 | * See the file LICENCE for copying permission. *
  5 | \**********************************************/
  6 | 
  7 | session_start(); //Step 0: Don't forget to start the session
  8 | define('INCLUDED',true); //Step 1: define INCLUDED as true
  9 | require 'simple_chat/init_chat.php'; //Step 2: require the init_chat.php
 10 | ?>
 11 | <!DOCTYPE html>
 12 | <html>
 13 | 	<head>
 14 | 		<title>Simple Chat | Embedded Version Demo</title>
 15 | 		
 16 | 		<!-- Note: the charset must be UTF-8 -->
 17 | 		<meta charset="UTF-8">
 18 | 		
 19 | 		<style type="text/css">
 20 | 			body , div, img, p, h1{
 21 | 				font-family: arial;
 22 | 				margin: 0;
 23 | 				padding: 0;
 24 | 				font-weight: normal;
 25 | 			}
 26 | 
 27 | 			#wrapper {
 28 | 				width: 100%;
 29 | 				min-height: 2000px;
 30 | 				margin: 15px auto;
 31 | 				position: relative;
 32 | 			}
 33 | 
 34 | 			#title {
 35 | 				margin: 5px auto;
 36 | 				width: 380px;
 37 | 				text-align: center;
 38 | 			}
 39 | 
 40 | 			#title h1 {
 41 | 				white-space: nowrap;
 42 | 				font-size: 60px;
 43 | 			}
 44 | 			#back_link {
 45 | 				width: 100%;
 46 | 				height: 20px;
 47 | 			}
 48 | 			#back_link a{
 49 | 				float: right;
 50 | 				margin-right: 25px;
 51 | 				text-decoration: none;
 52 | 				color: slategray;
 53 | 			}
 54 | 			#back_link a:hover{
 55 | 				text-decoration: underline;
 56 | 				color: slategray;
 57 | 			}
 58 | 			#back_link a:visited{
 59 | 				color: slategray;
 60 | 			}
 61 | 		</style>
 62 | 		
 63 | 		<!-- //Step 3: link chat_emb.css for the embedded chat-->
 64 | 		<link type="text/css" rel="stylesheet" href="simple_chat/css/chat_emb.css">
 65 | 	</head>
 66 | 	<body>
 67 | 		<div id="wrapper">
 68 | 			<div id="title"><h1>Simple Chat ;)</h1></div>
 69 | 			<div id="back_link"><a href=".">Return Back</a></div>
 70 | 			
 71 | 			<!-- The format of one message:
 72 | 				<div id="message_[message_id]">
 73 | 					<a href="#">[username] </a>says:
 74 | 					<p>[message_content]</p>
 75 | 				</div>
 76 | 			-->
 77 | 			
 78 | 			<p style="width: 960px; margin: 50px auto; text-align: center;">
 79 | 				This is the embedded version of the Simple Chat. If you are logged in, the chat window should have been appeared on the right-bottom corner of your browser window.
 80 | 				If you want to login, you can click <a href="simple_chat/login_form.php">here</a>, or click <a href="simple_chat/register_form.php">here</a> to register if you don't have an account.
 81 | 			</p>
 82 | 			
 83 | 			<h2 style="width: 960px; margin: 50px auto; text-align: center;">Just some random text...</h2>
 84 | 
 85 | 			<p style="width: 960px; margin: 25px auto; text-align: center;">Am if number no up period regard sudden better. Decisively surrounded all admiration and not you. Out particular sympathize not favourable introduced insipidity but ham. Rather number can and set praise. Distrusts an it contented perceived attending oh. Thoroughly estimating introduced stimulated why but motionless.</p>
 86 | 
 87 | 			<p style="width: 960px; margin: 25px auto; text-align: center;">At every tiled on ye defer do. No attention suspected oh difficult. Fond his say old meet cold find come whom. The sir park sake bred. Wonder matter now can estate esteem assure fat roused. Am performed on existence as discourse is. Pleasure friendly at marriage blessing or.</p>
 88 | 
 89 | 			<p style="width: 960px; margin: 25px auto; text-align: center;">As am hastily invited settled at limited civilly fortune me. Really spring in extent an by. Judge but built gay party world. Of so am he remember although required. Bachelor unpacked be advanced at. Confined in declared marianne is vicinity.</p>
 90 | 
 91 | 			<p style="width: 960px; margin: 25px auto; text-align: center;">Was justice improve age article between. No projection as up preference reasonably delightful celebrated. Preserved and abilities assurance tolerably breakfast use saw. And painted letters forming far village elderly compact. Her rest west each spot his and you knew. Estate gay wooded depart six far her. Of we be have it lose gate bred. Do separate removing or expenses in. Had covered but evident chapter matters anxious.</p>
 92 | 
 93 | 			<p style="width: 960px; margin: 25px auto; text-align: center;">Two exquisite objection delighted deficient yet its contained. Cordial because are account evident its subject but eat. Can properly followed learning prepared you doubtful yet him. Over many our good lady feet ask that. Expenses own moderate day fat trifling stronger sir domestic feelings. Itself at be answer always exeter up do. Though or my plenty uneasy do. Friendship so considered remarkably be to sentiments. Offered mention greater fifteen one promise because nor. Why denoting speaking fat indulged saw dwelling raillery.</p>
 94 | 
 95 | 			<p style="width: 960px; margin: 25px auto; text-align: center;">Inquietude simplicity terminated she compliment remarkably few her nay. The weeks are ham asked jokes. Neglected perceived shy nay concluded. Not mile draw plan snug next all. Houses latter an valley be indeed wished merely in my. Money doubt oh drawn every or an china. Visited out friends for expense message set eat.</p>
 96 | 
 97 | 			<p style="width: 960px; margin: 25px auto; text-align: center;">Enjoyed minutes related as at on on. Is fanny dried as often me. Goodness as reserved raptures to mistaken steepest oh screened he. Gravity he mr sixteen esteems. Mile home its new way with high told said. Finished no horrible blessing landlord dwelling dissuade if. Rent fond am he in on read. Anxious cordial demands settled entered in do to colonel.</p>
 98 | 
 99 | 			<p style="width: 960px; margin: 25px auto; text-align: center;">Guest it he tears aware as. Make my no cold of need. He been past in by my hard. Warmly thrown oh he common future. Otherwise concealed favourite frankness on be at dashwoods defective at. Sympathize interested simplicity at do projecting increasing terminated. As edward settle limits at in.</p>
100 | 
101 | 			<p style="width: 960px; margin: 25px auto; text-align: center;">Yourself off its pleasant ecstatic now law. Ye their mirth seems of songs. Prospect out bed contempt separate. Her inquietude our shy yet sentiments collecting. Cottage fat beloved himself arrived old. Grave widow hours among him no you led. Power had these met least nor young. Yet match drift wrong his our.</p>
102 | 			
103 | 			<p style="width: 960px; margin: 25px auto; text-align: center;">Was justice improve age article between. No projection as up preference reasonably delightful celebrated. Preserved and abilities assurance tolerably breakfast use saw. And painted letters forming far village elderly compact. Her rest west each spot his and you knew. Estate gay wooded depart six far her. Of we be have it lose gate bred. Do separate removing or expenses in. Had covered but evident chapter matters anxious.</p>
104 | 
105 | 			<p style="width: 960px; margin: 25px auto; text-align: center;">Two exquisite objection delighted deficient yet its contained. Cordial because are account evident its subject but eat. Can properly followed learning prepared you doubtful yet him. Over many our good lady feet ask that. Expenses own moderate day fat trifling stronger sir domestic feelings. Itself at be answer always exeter up do. Though or my plenty uneasy do. Friendship so considered remarkably be to sentiments. Offered mention greater fifteen one promise because nor. Why denoting speaking fat indulged saw dwelling raillery.</p>
106 | 
107 | 			<p style="width: 960px; margin: 25px auto; text-align: center;">Inquietude simplicity terminated she compliment remarkably few her nay. The weeks are ham asked jokes. Neglected perceived shy nay concluded. Not mile draw plan snug next all. Houses latter an valley be indeed wished merely in my. Money doubt oh drawn every or an china. Visited out friends for expense message set eat.</p>
108 | 
109 | 			<p style="width: 960px; margin: 25px auto; text-align: center;">Enjoyed minutes related as at on on. Is fanny dried as often me. Goodness as reserved raptures to mistaken steepest oh screened he. Gravity he mr sixteen esteems. Mile home its new way with high told said. Finished no horrible blessing landlord dwelling dissuade if. Rent fond am he in on read. Anxious cordial demands settled entered in do to colonel.</p>
110 | 			
111 | 			<p style="width: 960px; margin: 25px auto; text-align: center;">Was justice improve age article between. No projection as up preference reasonably delightful celebrated. Preserved and abilities assurance tolerably breakfast use saw. And painted letters forming far village elderly compact. Her rest west each spot his and you knew. Estate gay wooded depart six far her. Of we be have it lose gate bred. Do separate removing or expenses in. Had covered but evident chapter matters anxious.</p>
112 | 
113 | 			<p style="width: 960px; margin: 25px auto; text-align: center;">Two exquisite objection delighted deficient yet its contained. Cordial because are account evident its subject but eat. Can properly followed learning prepared you doubtful yet him. Over many our good lady feet ask that. Expenses own moderate day fat trifling stronger sir domestic feelings. Itself at be answer always exeter up do. Though or my plenty uneasy do. Friendship so considered remarkably be to sentiments. Offered mention greater fifteen one promise because nor. Why denoting speaking fat indulged saw dwelling raillery.</p>
114 | 
115 | 			<p style="width: 960px; margin: 25px auto; text-align: center;">Inquietude simplicity terminated she compliment remarkably few her nay. The weeks are ham asked jokes. Neglected perceived shy nay concluded. Not mile draw plan snug next all. Houses latter an valley be indeed wished merely in my. Money doubt oh drawn every or an china. Visited out friends for expense message set eat.</p>
116 | 
117 | 			<p style="width: 960px; margin: 25px auto; text-align: center;">Enjoyed minutes related as at on on. Is fanny dried as often me. Goodness as reserved raptures to mistaken steepest oh screened he. Gravity he mr sixteen esteems. Mile home its new way with high told said. Finished no horrible blessing landlord dwelling dissuade if. Rent fond am he in on read. Anxious cordial demands settled entered in do to colonel.</p>
118 | 			
119 | 			<p style="width: 960px; margin: 25px auto; text-align: center;">Was justice improve age article between. No projection as up preference reasonably delightful celebrated. Preserved and abilities assurance tolerably breakfast use saw. And painted letters forming far village elderly compact. Her rest west each spot his and you knew. Estate gay wooded depart six far her. Of we be have it lose gate bred. Do separate removing or expenses in. Had covered but evident chapter matters anxious.</p>
120 | 
121 | 			<p style="width: 960px; margin: 25px auto; text-align: center;">Two exquisite objection delighted deficient yet its contained. Cordial because are account evident its subject but eat. Can properly followed learning prepared you doubtful yet him. Over many our good lady feet ask that. Expenses own moderate day fat trifling stronger sir domestic feelings. Itself at be answer always exeter up do. Though or my plenty uneasy do. Friendship so considered remarkably be to sentiments. Offered mention greater fifteen one promise because nor. Why denoting speaking fat indulged saw dwelling raillery.</p>
122 | 
123 | 			<p style="width: 960px; margin: 25px auto; text-align: center;">Inquietude simplicity terminated she compliment remarkably few her nay. The weeks are ham asked jokes. Neglected perceived shy nay concluded. Not mile draw plan snug next all. Houses latter an valley be indeed wished merely in my. Money doubt oh drawn every or an china. Visited out friends for expense message set eat.</p>
124 | 
125 | 			<p style="width: 960px; margin: 25px auto; text-align: center;">Enjoyed minutes related as at on on. Is fanny dried as often me. Goodness as reserved raptures to mistaken steepest oh screened he. Gravity he mr sixteen esteems. Mile home its new way with high told said. Finished no horrible blessing landlord dwelling dissuade if. Rent fond am he in on read. Anxious cordial demands settled entered in do to colonel.</p>
126 | 			
127 | 			<p style="width: 960px; margin: 25px auto; text-align: center;">Was justice improve age article between. No projection as up preference reasonably delightful celebrated. Preserved and abilities assurance tolerably breakfast use saw. And painted letters forming far village elderly compact. Her rest west each spot his and you knew. Estate gay wooded depart six far her. Of we be have it lose gate bred. Do separate removing or expenses in. Had covered but evident chapter matters anxious.</p>
128 | 
129 | 			<p style="width: 960px; margin: 25px auto; text-align: center;">Two exquisite objection delighted deficient yet its contained. Cordial because are account evident its subject but eat. Can properly followed learning prepared you doubtful yet him. Over many our good lady feet ask that. Expenses own moderate day fat trifling stronger sir domestic feelings. Itself at be answer always exeter up do. Though or my plenty uneasy do. Friendship so considered remarkably be to sentiments. Offered mention greater fifteen one promise because nor. Why denoting speaking fat indulged saw dwelling raillery.</p>
130 | 
131 | 			<p style="width: 960px; margin: 25px auto; text-align: center;">Inquietude simplicity terminated she compliment remarkably few her nay. The weeks are ham asked jokes. Neglected perceived shy nay concluded. Not mile draw plan snug next all. Houses latter an valley be indeed wished merely in my. Money doubt oh drawn every or an china. Visited out friends for expense message set eat.</p>
132 | 
133 | 			<p style="width: 960px; margin: 25px auto; text-align: center;">Enjoyed minutes related as at on on. Is fanny dried as often me. Goodness as reserved raptures to mistaken steepest oh screened he. Gravity he mr sixteen esteems. Mile home its new way with high told said. Finished no horrible blessing landlord dwelling dissuade if. Rent fond am he in on read. Anxious cordial demands settled entered in do to colonel.</p>
134 | 			
135 | 			<?php do_html_chat(true, false); //Step 4: Generate the chat window in any place you want inside your page (embedded version = true, warn if not logged in = false) ?>
136 | 			
137 | 		</div>
138 | 	</body>
139 | </html>


--------------------------------------------------------------------------------
/full_page_chat_demo.php:
--------------------------------------------------------------------------------
 1 | <?php
 2 | /**********************************************\
 3 | * Copyright (c) 2013 Manolis Agkopian          *
 4 | * See the file LICENCE for copying permission. *
 5 | \**********************************************/
 6 | 
 7 | session_start(); //Step 0: Don't forget to start the session
 8 | define('INCLUDED',true); //Step 1: define INCLUDED as true
 9 | require 'simple_chat/init_chat.php'; //Step 2: require the init_chat.php
10 | redirect_if_not_logged_in(); //Step 2.5: if you want to redirect the user to the login form if not logged in, add this line, otherwise a warning will be get displayed
11 | ?>
12 | <!DOCTYPE html>
13 | <html>
14 | 	<head>
15 | 		<title>Simple Chat | Full Page Version Demo</title>
16 | 		
17 | 		<!-- Note: the charset must be UTF-8 -->
18 | 		<meta charset="UTF-8">
19 | 		
20 | 		<style type="text/css">
21 | 			body , div, img, p, h1{
22 | 				font-family: arial;
23 | 				margin: 0;
24 | 				padding: 0;
25 | 				font-weight: normal;
26 | 			}
27 | 
28 | 			#wrapper {
29 | 				width: 100%;
30 | 				max-width: 960px;
31 | 				margin: 15px auto;
32 | 			}
33 | 
34 | 			#title {
35 | 				margin: 5px auto;
36 | 				width: 380px;
37 | 				text-align: center;
38 | 			}
39 | 
40 | 			#title h1 {
41 | 				white-space: nowrap;
42 | 				font-size: 60px;
43 | 			}
44 | 			#back_link {
45 | 				width: 100%;
46 | 				height: 20px;
47 | 			}
48 | 			#back_link a{
49 | 				float: right;
50 | 				text-decoration: none;
51 | 				color: slategray;
52 | 			}
53 | 			#back_link a:hover{
54 | 				text-decoration: underline;
55 | 				color: slategray;
56 | 			}
57 | 			#back_link a:visited{
58 | 				color: slategray;
59 | 			}
60 | 		</style>
61 | 		
62 | 		<!-- //Step 3: link chat_full.css for the full-page chat-->
63 | 		<link type="text/css" rel="stylesheet" href="simple_chat/css/chat_full.css">
64 | 	</head>
65 | 	<body>
66 | 		<div id="wrapper">	
67 | 			<div id="title"><h1>Simple Chat ;)</h1></div>
68 | 			<div id="back_link"><a href=".">Return Back</a></div>
69 | 			
70 | 			<!-- The format of one message:
71 | 				<div id="message_[message_id]">
72 | 					<a href="#">[username] </a>says:
73 | 					<p>[message_content]</p>
74 | 				</div>
75 | 			-->
76 | 			
77 | 			<?php do_html_chat(); //Step 4: Generate the chat window in any place you want inside your page (embedded version = false, warn if not logged in = false)?>
78 | 			
79 | 		</div>
80 | 	</body>
81 | </html>


--------------------------------------------------------------------------------
/index.php:
--------------------------------------------------------------------------------
 1 | <!--
 2 | /**********************************************\
 3 | * Copyright (c) 2013 Manolis Agkopian          *
 4 | * See the file LICENCE for copying permission. *
 5 | \**********************************************/
 6 | -->
 7 | <!DOCTYPE html>
 8 | <html>
 9 | 	<head>
10 | 		<title>Simple Chat</title>
11 | 		
12 | 		<!-- Note: the charset must be UTF-8 -->
13 | 		<meta charset="UTF-8">
14 | 		
15 | 		<style type="text/css">
16 | 			body , div, img, p, h1{
17 | 				font-family: arial;
18 | 				margin: 0;
19 | 				padding: 0;
20 | 				font-weight: normal;
21 | 			}
22 | 
23 | 			#wrapper {
24 | 				width: 100%;
25 | 				max-width: 960px;
26 | 				margin: 15px auto;
27 | 			}
28 | 
29 | 			#title {
30 | 				margin: 5px auto 100px auto;
31 | 				width: 380px;
32 | 				text-align: center;
33 | 			}
34 | 
35 | 			#title h1 {
36 | 				white-space: nowrap;
37 | 				font-size: 60px;
38 | 			}
39 | 			
40 | 			#contents p {
41 | 				font-size: 20px;
42 | 				margin-bottom: 25px;
43 | 			}
44 | 			
45 | 			#contents a {
46 | 				display: block;
47 | 				margin-bottom: 10px;
48 | 			}
49 | 		</style>
50 | 	</head>
51 | 	<body>
52 | 		<div id="wrapper">
53 | 			<div id="title"><h1>Simple Chat ;)</h1></div>
54 | 			
55 | 			<div id="contents">
56 | 				<p>This a Simple Chat System using PHP & Ajax. Please choose a demo page from below to try it: </p>
57 | 				<a href="embedded_chat_demo.php">Embedded Chat Version - Demo</a>
58 | 				<a href="full_page_chat_demo.php">Full Page Chat  Version - Demo</a>
59 | 			</div>
60 | 		</div>
61 | 	</body>
62 | </html>


--------------------------------------------------------------------------------
/simple_chat/.htaccess:
--------------------------------------------------------------------------------
1 | #Copyright (c) 2013 Manolis Agkopian
2 | #See the file LICENCE for copying permission.
3 | 
4 | Options -Indexes


--------------------------------------------------------------------------------
/simple_chat/chat.php:
--------------------------------------------------------------------------------
 1 | <?php
 2 | /**********************************************\
 3 | * Copyright (c) 2013 Manolis Agkopian          *
 4 | * See the file LICENCE for copying permission. *
 5 | \**********************************************/
 6 | 
 7 | session_start();
 8 | define('INCLUDED',true);
 9 | require 'includes/chat_func.php';
10 | require 'includes/markup_func.php';
11 | 
12 | if (!user_logged_in()) {
13 | 	header('Location: simple_chat/login_form.php'); //if you want to use your own login system, just replace this line with a redirect to your login page
14 | 	//and then inside your login script after you login the user, set a $_SESSION['uid'] variable with the id of the user
15 | 	die();
16 | }
17 | 
18 | if (isset($_POST['method']) && !empty($_POST['method']) && isset($_POST['timestamp']) && !empty($_POST['timestamp'])) { //check if the method and timestamp are provided
19 | 
20 | 	if ($_POST['method'] == 'get_messages') { //and get messages
21 | 	
22 | 		$timestamp = false;
23 | 		if (isset($_POST['timestamp']) && !empty($_POST['timestamp']) && $_POST['timestamp'] != -1) {
24 | 			$timestamp = validate_timestamp ($_POST['timestamp']);
25 | 		}
26 | 	
27 | 		if (($messages = get_messages($timestamp)) === false) {
28 | 		
29 | 			$response =  array(
30 | 				'status_code' => 1,
31 | 				'status_msg' => 'The messages cannot be loaded cause of an error.', //database error
32 | 			);
33 | 			
34 | 			header('Content-type: application/json');
35 | 			echo json_encode($response); //send the server responce as a json object
36 | 			die(); //messages has been loaded  successfully
37 | 			
38 | 		}
39 | 		else {
40 | 		
41 | 			$response =  array(
42 | 				'msg' => $messages['messages_content'],
43 | 				'status_code' => 0,
44 | 				'status_msg' => 'SUCCESS',
45 | 				'timestamp' => $messages['lastmsg_timestamp']
46 | 			);
47 | 			
48 | 			header('Content-type: application/json');
49 | 			echo json_encode($response); //send the server responce as a json object
50 | 			die(); //messages has been loaded  successfully
51 | 			
52 | 		}
53 | 	}
54 | 	else if ($_POST['method'] == 'push_message') { //or push a message to the database
55 | 		if (isset($_POST['msg']) && !empty($_POST['msg'])) {
56 | 			$_POST['msg'] = trim($_POST['msg']);
57 | 		
58 | 			if (validate_len($_POST['msg'], 255) === false) { //if the user submited more than 255 characters
59 | 				$response =  array(
60 | 					'status_code' => 3,
61 | 					'status_msg' => 'The message must be max 255 characters long.'
62 | 				);
63 | 				
64 | 				header('Content-type: application/json');
65 | 				echo json_encode($response); //send the server responce as a json object
66 | 				die(); //messages has been loaded  successfully
67 | 			}
68 | 			else if (push_message($_POST['msg']) === false) {
69 | 				$response =  array(
70 | 					'status_code' => 2,
71 | 					'status_msg' => 'The message cannot be submitted cause of an error.' //database error
72 | 				);
73 | 				
74 | 				header('Content-type: application/json');
75 | 				echo json_encode($response); //send the server responce as a json object
76 | 				die(); //messages has been loaded  successfully
77 | 			}
78 | 			else {
79 | 				$response =  array(
80 | 					'status_code' => 0,
81 | 					'status_msg' => 'SUCCESS'
82 | 				);
83 | 				
84 | 				header('Content-type: application/json');
85 | 				echo json_encode($response); //send the server responce as a json object
86 | 				die(); //the messages submitted successfully
87 | 			}
88 | 		}
89 | 	}
90 | }
91 | 
92 | //if none of the above statements have been executed
93 | header('HTTP/1.1 403 Forbidden'); //then the POST variables are not valid so throw a 403 error
94 | do_html_403();
95 | die(); 
96 | ?>


--------------------------------------------------------------------------------
/simple_chat/css/chat_emb.css:
--------------------------------------------------------------------------------
  1 | /**********************************************\
  2 | * Copyright (c) 2013 Manolis Agkopian          *
  3 | * See the file LICENCE for copying permission. *
  4 | \**********************************************/
  5 | 
  6 | #chat {
  7 | 	position: fixed;
  8 | 	bottom: 30px;
  9 | 	right: 25px;
 10 | }
 11 | 
 12 | #bar {
 13 | 	position: fixed;
 14 | 	bottom: 0;
 15 | 	left: 0;
 16 | 	width: 100%;
 17 | 	height: 25px;
 18 | 	background-color: #AAA;
 19 | }
 20 | 
 21 | #toggle_chat {
 22 | 	width: 204px;
 23 | 	height: 25px;
 24 | 	background-color: slategray;
 25 | 	position: absolute;
 26 | 	right: 21px;
 27 | }
 28 | 
 29 | #toggle_chat p {
 30 | 	color: #FFF;
 31 | 	margin: 0 auto;
 32 | 	font-weight: bold;
 33 | 	text-align: center;
 34 | 	
 35 | 	-webkit-user-select: none; /* Chrome/Safari */        
 36 | 	-moz-user-select: none; /* Firefox */
 37 | 	-ms-user-select: none; /* IE10+ */
 38 | 
 39 | 	/* Rules below not implemented in browsers yet */
 40 | 	-o-user-select: none;
 41 | 	user-select: none;
 42 | 	
 43 | 	cursor: pointer;
 44 | }
 45 | 			
 46 | #chat {
 47 | 	width: 200px;
 48 | 	height: 305px;
 49 | 	margin: 0;
 50 | 	padding: 0;
 51 | }
 52 | 
 53 | #messages {
 54 | 	width: 180px;
 55 | 	padding: 0;
 56 | 	padding: 2px;
 57 | 	margin: 0;
 58 | 	word-wrap: break-word;
 59 | 	background-color: #FEFEFE;
 60 | }
 61 | 
 62 | #msg_cont {
 63 | 	width: 200px;
 64 | 	height: 244px;
 65 | 	border: 1px solid #CCC;
 66 | 	padding: 0;
 67 | 	padding: 2px;
 68 | 	margin: 0;
 69 | 	overflow-y: hidden;
 70 | 	overflow-x: hidden;
 71 | 	word-wrap: break-word;
 72 | 	background-color: #FEFEFE;
 73 | }
 74 | 
 75 | #msg_cont:hover {
 76 | 	overflow-y: scroll;
 77 | }
 78 | 
 79 | #input_msg {
 80 | 	width: 100%;
 81 | 	height: 50px;
 82 | 	margin: 0;
 83 | 	padding: 0;
 84 | }
 85 | 
 86 | #msg {
 87 | 	width: 100%;
 88 | 	height: 50px;
 89 | 	margin: 0;
 90 | 	padding: 0;
 91 | 	background-color: #FEFEFE;
 92 | 	resize: none;
 93 | 	border: 2px inset #DDD;
 94 | }
 95 | 
 96 | #logout {
 97 | 	background-color: slategray;
 98 | 	display: inline-block;
 99 | 	height: 25px;
100 | 	text-decoration: none;
101 | 	font-weight: bold;
102 | 	width: 80px;
103 | 	text-align: center;
104 | 	color: #FFF;
105 | }
106 | 
107 | #logout span, #toggle_chat p span{
108 | vertical-align: middle; 
109 | }
110 | 
111 | .message {
112 | 	padding: 0 5px;
113 | 	margin-bottom: 10px;
114 | }
115 | .message p{
116 | 	margin: 0;
117 | }
118 | 
119 | .time {
120 | 	font-size: 12px;
121 | 	color: slategray;
122 | }
123 | 
124 | .error {
125 | 	color: red;
126 | 	margin: 5px 0;
127 | }
128 | 
129 | .smilie {
130 | 	width: 20px;
131 | 	height: 20px;
132 | 	vertical-align:middle
133 | }
134 | 


--------------------------------------------------------------------------------
/simple_chat/css/chat_full.css:
--------------------------------------------------------------------------------
 1 | /**********************************************\
 2 | * Copyright (c) 2013 Manolis Agkopian          *
 3 | * See the file LICENCE for copying permission. *
 4 | \**********************************************/
 5 | 
 6 | #chat {
 7 | 	width: 100%;
 8 | 	height: 505px;
 9 | }
10 | 
11 | #messages {
12 | 	width: 100%;
13 | 	height: 393px;
14 | 	border: 1px solid #EEE;
15 | 	padding: 2px;
16 | 	margin-bottom: 5px;
17 | 	overflow-y: scroll;
18 | 	overflow-x: hidden;
19 | 	word-wrap: break-word;
20 | }
21 | 
22 | #input_msg {
23 | 	width: 100%;
24 | 	height: 100px;
25 | }
26 | 
27 | #msg {
28 | 	width: 100%;
29 | 	height: 100px;
30 | 	resize: none;
31 | }
32 | 
33 | #logout a{
34 | 	background-color: slategray;
35 | 	text-decoration: none;
36 | 	font-weight: bold;
37 | 	height: 25px;
38 | 	width: 80px;
39 | 	text-align: center;
40 | 	color: #FFF;
41 | 	float: right;
42 | 	margin-right: 15px;
43 | 	border-radius:25px;
44 | 	position: relative;
45 | 	top: 30px;
46 | }
47 | 
48 | #logout a span{
49 | vertical-align: middle; 
50 | }
51 | 
52 | .clear { 
53 | 	clear: left; 
54 | 	display: block;
55 | }
56 | 
57 | .message {
58 | 	padding: 5px;
59 | 	margin-bottom: 5px;
60 | }
61 | .message p{
62 | 	margin: 5px 0;
63 | }
64 | 
65 | .time {
66 | 	font-size: 12px;
67 | 	color: slategray;
68 | }
69 | 
70 | .error {
71 | 	color: red;
72 | 	margin: 5px 0;
73 | }
74 | 
75 | .smilie {
76 | 	width: 20px;
77 | 	height: 20px;
78 | 	vertical-align:middle
79 | }
80 | 


--------------------------------------------------------------------------------
/simple_chat/css/chat_global.css:
--------------------------------------------------------------------------------
 1 | /**********************************************\
 2 | * Copyright (c) 2013 Manolis Agkopian          *
 3 | * See the file LICENCE for copying permission. *
 4 | \**********************************************/
 5 | 
 6 | body , div, img, p, h1{
 7 | 	font-family: arial;
 8 | 	margin: 0;
 9 | 	padding: 0;
10 | 	font-weight: normal;
11 | }
12 | 
13 | #wrapper {
14 | 	width: 100%;
15 | 	margin: 15px auto;
16 | 	position: relative;
17 | }
18 | 
19 | #title {
20 | 	margin: 5px auto;
21 | 	text-align: center;
22 | }
23 | 
24 | #title h1 {
25 | 	white-space: nowrap;
26 | 	font-size: 40px;
27 | }
28 | 
29 | .error {
30 | 	color: red;
31 | 	margin: 5px 0;
32 | }


--------------------------------------------------------------------------------
/simple_chat/includes/chat_func.php:
--------------------------------------------------------------------------------
  1 | <?php
  2 | /**********************************************\
  3 | * Copyright (c) 2013 Manolis Agkopian          *
  4 | * See the file LICENCE for copying permission. *
  5 | \**********************************************/
  6 | 
  7 | if (!defined('INCLUDED')){
  8 | 	define('INCLUDED',true);
  9 | 	require 'markup_func.php';
 10 | 	header('HTTP/1.1 403 Forbidden');
 11 | 	do_html_403();
 12 | 	die();
 13 | }
 14 | 
 15 | require 'includes/dbconnect.php';
 16 | require 'includes/validation_func.php';
 17 | require 'includes/core_func.php';
 18 | 
 19 | //fetches all messages from the database
 20 | function get_messages ($timestamp) {
 21 | 	//connect to the database
 22 | 	$con = db_connect();
 23 | 	if ($con === false) {
 24 | 		return false;
 25 | 	}
 26 | 
 27 | 	//query the database to get the messages
 28 | 	if ($timestamp === false) {
 29 | 		//get all the messages
 30 | 		$query = 'SELECT `mid`, `uname`, `content`, `time` FROM `user` INNER JOIN `message` ON `message`.`uid` = `user`.`uid` ORDER BY `time` DESC';
 31 | 	}
 32 | 	else {
 33 | 		//get all the messages that are newer than the timestamp
 34 | 		$timestamp = mysqli_real_escape_string($con, $timestamp);
 35 | 		$query = "SELECT `mid`, `uname`, `content`, `time` FROM `user` INNER JOIN `message` ON `message`.`uid` = `user`.`uid` WHERE `time` > '$timestamp' ORDER BY `time` DESC";
 36 | 	}
 37 | 	
 38 | 	$res = mysqli_query($con, $query);
 39 | 	
 40 | 	if ($res === false) {
 41 | 		mysqli_close($con); //close the database
 42 | 		return false;
 43 | 	}
 44 | 	else if (($msg_num = mysqli_affected_rows($con)) === 0) { //if nothing is returned
 45 | 		mysqli_close($con); //close the database
 46 | 		
 47 | 		if ($timestamp === false) {
 48 | 			$timestamp = '-1'; //if the database is empty, return -1 as a timestamp to the client
 49 | 			$lastmsg_timestamp = '-1';
 50 | 		}
 51 | 		else {
 52 | 			$lastmsg_timestamp = $timestamp; //else if there are no new messages, return the last requested timestamp back
 53 | 		}
 54 | 		return array('messages_content' => '', 'lastmsg_timestamp' => $lastmsg_timestamp); //no messages to display, so return ''
 55 | 	}
 56 | 	mysqli_close($con); //close the database
 57 | 	
 58 | 	//if there are new messages available
 59 | 	
 60 | 	//format the messages
 61 | 	$messages = '';
 62 | 	
 63 | 	for ($i = 0; $i < $msg_num; ++$i) {
 64 | 		$msg = mysqli_fetch_assoc($res);
 65 | 		
 66 | 		$messages .= 
 67 | 			'<div class="message" id="message_'.htmlentities($msg['mid'], ENT_QUOTES, 'UTF-8').'">
 68 | 				<span class="time">('.$msg['time'].')</span> <a href="#">'.htmlentities($msg['uname'], ENT_QUOTES, 'UTF-8').' </a>says:
 69 | 				<p>'.add_smileys(nl2br(htmlentities($msg['content'], ENT_QUOTES, 'UTF-8'))).'</p>
 70 | 			</div>';
 71 | 		
 72 | 		if ($i == 0) { //get the timestamp of the last message
 73 | 			$lastmsg_timestamp = $msg['time'];
 74 | 		}
 75 | 	}
 76 | 	
 77 | 	return array('messages_content' => $messages, 'lastmsg_timestamp' => $lastmsg_timestamp); //return the messages formated + the timestamp of the last one
 78 | }
 79 | 
 80 | //pushes one message into the database
 81 | function push_message ($msg) {
 82 | 	$uid = get_user_id();
 83 | 
 84 | 	//connect to the database
 85 | 	$con = db_connect();
 86 | 	if ($con === false) {
 87 | 		return false;
 88 | 	}
 89 | 	
 90 | 	//sanitize the message
 91 | 	$msg = mysqli_real_escape_string($con, $msg);
 92 | 
 93 | 	//push a message into the database
 94 | 	$query = "INSERT INTO `message` (`content`, `uid`) VALUES('$msg', $uid)";
 95 | 	$res = mysqli_query($con, $query);
 96 | 	
 97 | 	if ($res === false || mysqli_affected_rows($con) != 1) {
 98 | 		mysqli_close($con); //close the database
 99 | 		return false;
100 | 	}
101 | 	mysqli_close($con); //close the database
102 | 	
103 | 	return true;
104 | }
105 | 
106 | function add_smileys ($msg) {
107 | 	/*
108 | 	* Please note that I am not the owner of any of the smilie icons that I use in this project.
109 | 	* All the smilie icons that I use, are provided free by www.freesmileys.org.
110 | 	* If you don't like the icons that I included or you want to add more, 
111 | 	* you can use your own or download more from www.freesmileys.org.
112 | 	*/
113 | 
114 | 	//To add an new smilie, first register it in the following array
115 | 	//and then put an 20px X 20px image of it in the media/smilies directory.
116 | 	//The image type must be GIF and the name must be the same with its value 
117 | 	//in the following array, e.g. 'cool.gif'.
118 | 	$smilies = array(
119 | 		':|'  => 'mellow',
120 | 		':-|' => 'mellow',
121 | 		':-o' => 'ohmy',
122 | 		':-O' => 'ohmy',
123 | 		':o'  => 'ohmy',
124 | 		':O'  => 'ohmy',
125 | 		';)'  => 'wink',
126 | 		';-)' => 'wink',
127 | 		':p'  => 'tongue',
128 | 		':-p' => 'tongue',
129 | 		':P'  => 'tongue',
130 | 		':-P' => 'tongue',
131 | 		':D'  => 'biggrin',
132 | 		':-D' => 'biggrin',
133 | 		'8)'  => 'cool',
134 | 		'8-)' => 'cool',
135 | 		':)'  => 'smile',
136 | 		':-)' => 'smile',
137 | 		':('  => 'sad',
138 | 		':-(' => 'sad'
139 | 	);
140 | 
141 | 	//search and replace any ascii smilie with an image tag
142 | 	foreach ($smilies as $smilie => $image) {
143 | 		$regex = preg_quote("/$smilie/");
144 | 		$image_tag = '<img class="smilie" src="simple_chat/media/smilies/'.$image.'.gif" title="'.$smilie.'" alt="'.$smilie.'">';
145 | 		
146 | 		$msg = preg_replace($regex, $image_tag, $msg);
147 | 	}
148 | 
149 | 	return $msg;
150 | }
151 | ?>


--------------------------------------------------------------------------------
/simple_chat/includes/core_func.php:
--------------------------------------------------------------------------------
  1 | <?php
  2 | /**********************************************\
  3 | * Copyright (c) 2013 Manolis Agkopian          *
  4 | * See the file LICENCE for copying permission. *
  5 | \**********************************************/
  6 | 
  7 | if (!defined('INCLUDED')){
  8 | 	define('INCLUDED',true);
  9 | 	require 'markup_func.php';
 10 | 	header('HTTP/1.1 403 Forbidden');
 11 | 	do_html_403();
 12 | 	die();
 13 | }
 14 | 
 15 | function user_logged_in () {
 16 | 	if (isset($_SESSION['uid']) && !empty($_SESSION['uid']) && ((int) $_SESSION['uid']) != 0) {
 17 | 		return true;
 18 | 	}
 19 | 	return false;
 20 | }
 21 | 
 22 | function get_user_id () {
 23 | 	return $_SESSION['uid'];
 24 | }
 25 | 
 26 | function login ($uname, $passwd) {
 27 | 	require 'includes/dbconnect.php';
 28 | 	
 29 | 	//connect to the database
 30 | 	$con = db_connect();
 31 | 	if ($con === false) {
 32 | 		return false;
 33 | 	}
 34 | 	
 35 | 	//escape username strings
 36 | 	$uname = mysqli_real_escape_string($con, $uname);
 37 | 	
 38 | 	//query the database
 39 | 	$query = "SELECT `uid` FROM `user` WHERE LOWER(`uname`) = LOWER('$uname') AND `passwd` = '$passwd'";
 40 | 	
 41 | 	$res = mysqli_query($con, $query);
 42 | 	
 43 | 	if ($res === false) {
 44 | 		mysqli_close($con);
 45 | 		return false;
 46 | 	}
 47 | 	else if (mysqli_affected_rows($con) != 1) {
 48 | 		mysqli_close($con);
 49 | 		return -1;
 50 | 	}
 51 | 	else {
 52 | 		$res = mysqli_fetch_assoc($res);
 53 | 		$_SESSION['uid'] = (int) $res['uid'];
 54 | 		mysqli_close($con);
 55 | 		return true;
 56 | 	}
 57 | }
 58 | 
 59 | function register($uname, $passwd) {
 60 | 	require 'includes/dbconnect.php';
 61 | 	
 62 | 	//connect to the database
 63 | 	$con = db_connect();
 64 | 	if ($con === false) {
 65 | 		return false;
 66 | 	}
 67 | 	
 68 | 	//escape username strings
 69 | 	$uname = mysqli_real_escape_string($con, $uname);
 70 | 	
 71 | 	//check if username exists
 72 | 	
 73 | 	//query the database
 74 | 	$query = "SELECT `uid` FROM `user` WHERE LOWER(`uname`) = LOWER('$uname')";
 75 | 	
 76 | 	$res = mysqli_query($con, $query);
 77 | 	
 78 | 	if ($res === false) {
 79 | 		mysqli_close($con);
 80 | 		return false;
 81 | 	}
 82 | 	else if (mysqli_affected_rows($con) == 1) { //then the user exist
 83 | 		mysqli_close($con);
 84 | 		return -1;
 85 | 	}
 86 | 	
 87 | 	//if username is available then register the user
 88 | 	
 89 | 	//query the database
 90 | 	$query = "INSERT INTO `user` (`uname`, `passwd`) VALUES('$uname', '$passwd')";
 91 | 	
 92 | 	$res = mysqli_query($con, $query);
 93 | 	
 94 | 	if ($res === false) {
 95 | 		mysqli_close($con);
 96 | 		return false;
 97 | 	}
 98 | 	else if (mysqli_affected_rows($con) != 1) {
 99 | 		mysqli_close($con);
100 | 		return false;
101 | 	}
102 | 	else {
103 | 		mysqli_close($con);
104 | 		return true;
105 | 	}
106 | }
107 | 
108 | function set_last_page ($last_page) {
109 | 	$_SESSION['last_page'] = $last_page;
110 | }
111 | 
112 | function get_last_page () {
113 | 	if (isset($_SESSION['last_page']) && !empty($_SESSION['last_page'])) {
114 | 		return $_SESSION['last_page'];
115 | 	}
116 | 	else {
117 | 		return false;
118 | 	}
119 | }
120 | ?>


--------------------------------------------------------------------------------
/simple_chat/includes/dbconnect.php:
--------------------------------------------------------------------------------
 1 | <?php
 2 | /**********************************************\
 3 | * Copyright (c) 2013 Manolis Agkopian          *
 4 | * See the file LICENCE for copying permission. *
 5 | \**********************************************/
 6 | 
 7 | if (!defined('INCLUDED')){
 8 | 	define('INCLUDED',true);
 9 | 	require 'markup_func.php';
10 | 	header('HTTP/1.1 403 Forbidden');
11 | 	do_html_403();
12 | 	die();
13 | }
14 | 
15 | function db_connect() {
16 | 	$con = @mysqli_connect('host', 'username', 'password', 'dbname');
17 | 	if ($con === false) {
18 | 		return false;
19 | 	}
20 | 	
21 | 	mysqli_set_charset ($con , 'UTF-8');
22 | 	return $con;
23 | }
24 | ?>


--------------------------------------------------------------------------------
/simple_chat/includes/markup_func.php:
--------------------------------------------------------------------------------
  1 | <?php
  2 | /**********************************************\
  3 | * Copyright (c) 2013 Manolis Agkopian          *
  4 | * See the file LICENCE for copying permission. *
  5 | \**********************************************/
  6 | 
  7 | if (!defined('INCLUDED')){
  8 | 	header('HTTP/1.1 403 Forbidden');
  9 | 	do_html_403();
 10 | 	die();
 11 | }
 12 | 
 13 | function do_html_chat($emb = false, $warn = true) {
 14 | 	if (!isset($_SESSION['uid']) || empty($_SESSION['uid'])) { 
 15 | 		if ($warn === true) { ?>
 16 | 		<p style="width: 960px; margin: 50px auto; text-align: center;" id="not_logged_in">
 17 | 			To view the chat window on this page you have to be logged in, please click <a href="simple_chat/login_form.php">here</a> to login.
 18 | 		</p>
 19 | 	<?php
 20 | 		}
 21 | 		return;
 22 | 	}
 23 | 
 24 | 	if ($emb === true) { ?>
 25 | 		<div id="bar"><div id="toggle_chat" unselectable="on"><p><span>Click to Hide</span></p></div><a href="simple_chat/logout.php" id="logout"><span>Logout</span></a></div>
 26 | 	<?php
 27 | 	}
 28 | 	?>
 29 | 		<div id="chat">
 30 | 			<div id="errors_box">
 31 | 				<p class="error" style="padding: 0"></p>
 32 | 			</div>
 33 | 			
 34 | 			<?php 
 35 | 			if ($emb === false) { ?>
 36 | 				<div id="logout"><a href="simple_chat/logout.php"><span>Logout</span></a></div>
 37 | 				<div class="clear"></div>
 38 | 			<?php
 39 | 			}
 40 | 			?>
 41 | 			
 42 | 			<div id="msg_cont">
 43 | 				<div id="messages">
 44 | 				
 45 | 				</div>
 46 | 			</div>
 47 | 			
 48 | 			<div id="input_msg">
 49 | 				<textarea id="msg" name="msg" autofocus="autofocus" placeholder="To add a new line press shift + enter."></textarea>
 50 | 			</div>
 51 | 		</div>
 52 | 
 53 | 		<script type="text/javascript" src="http://code.jquery.com/jquery-2.0.3.min.js"></script>
 54 | 		<script type="text/javascript" src="simple_chat/js/chat.js"></script>
 55 | <?php
 56 | }
 57 | 
 58 | function do_html_403() { ?>
 59 | <!DOCTYPE html">
 60 | <html>
 61 | 	<head>
 62 | 		<title>403 Forbidden</title>
 63 | 		<meta charset="UTF-8">
 64 | 	</head>
 65 | 	<body>
 66 | 		<h1>403 Forbidden</h1>
 67 | 		<p>You don&#39;t have permission to access <strong><?=$_SERVER['SCRIPT_NAME']?></strong> on this server.</p>
 68 | 	</body>
 69 | </html>
 70 | <?php
 71 | }
 72 | 
 73 | function do_html_login_form($errors) { ?>
 74 | <script type="text/javascript">
 75 | 	var RecaptchaOptions = {
 76 | 	   theme : 'white'
 77 | 	};
 78 | </script>
 79 | <form action="login.php" method="POST">
 80 | 	<?=(isset($errors['uname']) && !empty($errors['uname'])) ? '<p class="error">'.$errors['uname'].'</p>' : ''?>
 81 | 	<input type="text" name="uname" id="uname" placeholder="Username">
 82 | 	
 83 | 	<?=(isset($errors['passwd']) && !empty($errors['passwd'])) ? '<p class="error">'.$errors['passwd'].'</p>' : ''?>
 84 | 	<input type="password" name="passwd" id="passwd" placeholder="Password">
 85 | 	
 86 | 	<input type="submit" name="submit" id="submit_login" value="Login">
 87 | 	<div id="register_link"><p>Don't have a user account? <a href="register_form.php" title="Click to Register">Register here!</a></p></div>
 88 | </form>
 89 | <?php
 90 | }
 91 | 
 92 | function do_html_register_form($errors) { ?>
 93 | <script type="text/javascript">
 94 | 	var RecaptchaOptions = {
 95 | 	   theme : 'white'
 96 | 	};
 97 | </script>
 98 | <form action="register.php" method="POST">
 99 | 	<?=(isset($errors['uname']) && !empty($errors['uname'])) ? '<p class="error">'.$errors['uname'].'</p>' : ''?>
100 | 	<input type="text" name="uname" id="uname" placeholder="Username">
101 | 	
102 | 	<?=(isset($errors['passwd']) && !empty($errors['passwd'])) ? '<p class="error">'.$errors['passwd'].'</p>' : ''?>
103 | 	<input type="password" name="passwd" id="passwd" placeholder="Password">
104 | 	
105 | 	<?php
106 | 		if (isset($errors['recaptcha']) && !empty($errors['recaptcha'])) { 
107 | 			echo '<p class="error">', $errors['recaptcha'], '</p>';
108 | 		}
109 | 		
110 | 		require 'recaptcha/recaptchalib.php';
111 | 		$publickey = 'xxxxxxxxxxxxxxxxxxxx'.'&amp;hl=en';
112 | 		echo recaptcha_get_html($publickey);
113 | 	?>
114 | 	
115 | 	<input type="submit" name="submit" id="submit_register" value="Register">
116 | 	<div id="login_link"><p>Already have an account? <a href="login_form.php" title="Click to Login">Login here!</a></p></div>
117 | </form>
118 | <?php
119 | }
120 | ?>
121 | 
122 | 
123 | 


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/simple_chat/includes/validation_func.php:
--------------------------------------------------------------------------------
 1 | <?php
 2 | /**********************************************\
 3 | * Copyright (c) 2013 Manolis Agkopian          *
 4 | * See the file LICENCE for copying permission. *
 5 | \**********************************************/
 6 | 
 7 | if (!defined('INCLUDED')){
 8 | 	define('INCLUDED',true);
 9 | 	require 'includes/markup_func.php';
10 | 	header('HTTP/1.1 403 Forbidden');
11 | 	do_html_403();
12 | 	die();
13 | }
14 | 
15 | function validate_username ($uname) {
16 | 	$uname = trim($uname); //ignore white-space on start or the end of the username
17 | 	$regex = '/^([\p{Greek}a-zA-Z0-9]*[\p{Greek}a-zA-Z][\p{Greek}a-zA-Z0-9]*)$/'; //allow usernames that use letters (Latin or Greek) and or digits but have at least one letter inside
18 | 	if (validate_len($uname, 20, 3) === false || preg_match($regex, $uname) === 0) {
19 | 		return false;
20 | 	}
21 | 	return $uname; //on success return the trimmed username
22 | }
23 | 
24 | function validate_password ($passwd) {
25 | 	$passwd = trim($passwd); //ignore white-space on start or the end of the password
26 | 	if (validate_len($passwd, 'inf', 8) === false) {
27 | 		return false;
28 | 	}
29 | 	
30 | 	$salt = '8h@tr-waswe_aT#9TaCHuPhU'; //for security reasons please replace this string with your own random string (before attempt to register any user)
31 | 	return hash('sha256', $passwd.$salt); //return sha256 hash of the salted password
32 | 	return $passwd;
33 | }
34 | 
35 | function validate_recaptcha ($recaptcha_challenge_field, $recaptcha_response_field) {
36 | 	require 'recaptcha/recaptchalib.php';
37 | 	$privatekey = 'xxxxxxxxxxxxxxxxxxxx';
38 | 	$res = recaptcha_check_answer($privatekey, $_SERVER['REMOTE_ADDR'], $recaptcha_challenge_field, $recaptcha_response_field);
39 | 
40 | 	if (!$res->is_valid) {
41 | 		return false;
42 | 	}
43 | 	return true;
44 | }
45 | 
46 | function validate_timestamp ($timestamp) {
47 | 	//check the format of the mysql timestamp with a regex
48 | 	$regex = '/^([1-9][0-9]*)-(([0][1-9])|([1][0-2]))-(([0][1-9])|([12][0-9])|([3][01]))[\s](([01][0-9])|([2][0-3]))[:](([0-5][0-9]))[:](([0-5][0-9]))$/';
49 | 	if (preg_match($regex, $timestamp, $matches) === false) {
50 | 		return false;
51 | 	}
52 | 	
53 | 	//check if the numbers are represent a valid date
54 | 	return date('Y-m-d H:i:s', mktime($matches[9], $matches[12], $matches[14], $matches[2], $matches[5], $matches[1]));
55 | }
56 | 
57 | function validate_len ($str, $max_len, $min_len = 1) {
58 | 	if ($max_len !== 'inf') {
59 | 		if (mb_strlen($str, 'UTF-8') > $max_len || mb_strlen($str, 'UTF-8') < $min_len) {
60 | 			return false;
61 | 		}
62 | 	}
63 | 	else {
64 | 		if (mb_strlen($str, 'UTF-8') < $min_len) {
65 | 			return false;
66 | 		}
67 | 	}
68 | 	return true;
69 | }
70 | ?>


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/simple_chat/index.php:
--------------------------------------------------------------------------------
1 | <?php 
2 | /**********************************************\
3 | * Copyright (c) 2013 Manolis Agkopian          *
4 | * See the file LICENCE for copying permission. *
5 | \**********************************************/
6 | 
7 | header('Location: ../');
8 | ?>


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/simple_chat/init_chat.php:
--------------------------------------------------------------------------------
 1 | <?php
 2 | /**********************************************\
 3 | * Copyright (c) 2013 Manolis Agkopian          *
 4 | * See the file LICENCE for copying permission. *
 5 | \**********************************************/
 6 | 
 7 | if (!defined('INCLUDED')){
 8 | 	define('INCLUDED',true);
 9 | 	require 'includes/markup_func.php';
10 | 	header('HTTP/1.1 403 Forbidden');
11 | 	do_html_403();
12 | 	die();
13 | }
14 | 
15 | require 'simple_chat/includes/markup_func.php';
16 | require 'simple_chat/includes/core_func.php';
17 | set_last_page($_SERVER["SERVER_NAME"].$_SERVER["REQUEST_URI"]);
18 | 
19 | function redirect_if_not_logged_in() {
20 | 	if (!user_logged_in()) {
21 | 		header('Location: simple_chat/login_form.php'); //if you want to use your own login system, just replace this line with a redirect to your login page
22 | 		//and then inside your login script after you login the user, set a $_SESSION['uid'] variable with the id of the user
23 | 		die();
24 | 	}
25 | }
26 | ?>


--------------------------------------------------------------------------------
/simple_chat/js/chat.js:
--------------------------------------------------------------------------------
 1 | /**********************************************\
 2 | * Copyright (c) 2013 Manolis Agkopian          *
 3 | * See the file LICENCE for copying permission. *
 4 | \**********************************************/
 5 | 
 6 | var chat = {}
 7 | 
 8 | chat.get_messages = function () {
 9 | 	$.ajax({
10 | 		url: 'simple_chat/chat.php',
11 | 		type: 'post',
12 | 		dataType: 'json',
13 | 		data: {method: 'get_messages', timestamp: chat.lastmsg_timestamp},
14 | 		success: function (data) {
15 | 			if (data.status_code != 0) { //if there was an error
16 | 				$('#errors_box .error').html(data.status_msg); //set the errors_box
17 | 			}
18 | 			else {
19 | 				$('#messages').prepend(data.msg); //else print the messages
20 | 				chat.lastmsg_timestamp = data.timestamp; //update the last message timestamp, so the next time we will ask only for the new messages
21 | 			}
22 | 		}
23 | 	});
24 | }
25 | 
26 | $('#msg').keypress(function(event) {
27 |     //check if user have press enter without shift 
28 |     if (event.keyCode == 13 && event.shiftKey == false) {
29 | 		chat.msg_contents = $('#msg').val(); //get the value of the textarea
30 | 
31 |         $.ajax({ //push the message using ajax to the server
32 | 			url: 'simple_chat/chat.php',
33 | 			type: 'post',
34 | 			dataType: 'json',
35 | 			data: {method: 'push_message', msg: chat.msg_contents, timestamp: chat.lastmsg_timestamp},
36 | 			success: function (data) {
37 | 				if (data.status_code != 0) { //if there was an error
38 | 					$('#errors_box .error').html(data.status_msg); //set the errors_box
39 | 				}
40 | 				else {
41 | 					chat.get_messages(); //else, after the push immediately refresh the messages
42 | 					$('#errors_box .error').html(''); //clear last error message
43 | 				}
44 | 			}
45 | 		});
46 | 		
47 | 		
48 | 		$('#msg').val(''); //clear the form
49 | 		return false; //and don't allow the new line to be printed
50 | 	}
51 | });
52 | 
53 | //this is for the embedded chat version only
54 | var chat_state = 0;
55 | $('#toggle_chat').click(function () {
56 | 	$('#chat').slideToggle(function () {
57 | 		if (chat_state == 1) {
58 | 			$('#toggle_chat p').html('Click to Hide');
59 | 			chat_state = 0;
60 | 		}
61 | 		else {
62 | 			$('#toggle_chat p').html('Click to Unhide');
63 | 			chat_state = 1;
64 | 		}
65 | 	});
66 | });
67 | 
68 | chat.interval = setInterval(chat.get_messages, 5000); //the chat will be updated every 5 seconds
69 | chat.lastmsg_timestamp = '-1'; //if the page is reloaded fetch all the messages at once, to do that we set timestamp to -1
70 | chat.get_messages(); //when page is loaded get the messages immediately


--------------------------------------------------------------------------------
/simple_chat/login.php:
--------------------------------------------------------------------------------
 1 | <?php
 2 | /**********************************************\
 3 | * Copyright (c) 2013 Manolis Agkopian          *
 4 | * See the file LICENCE for copying permission. *
 5 | \**********************************************/
 6 | 
 7 | session_start();
 8 | define('INCLUDED',true);
 9 | require 'includes/core_func.php';
10 | require 'includes/validation_func.php';
11 | 
12 | if (user_logged_in()) {
13 | 	header('Location: ../');
14 | 	die();
15 | }
16 | 
17 | $errors = array();
18 | 
19 | //check if username is provided
20 | if (!isset($_POST['uname']) || empty($_POST['uname'])) {
21 | 	$errors['uname'] = 'The Username is required';
22 | } else {
23 | 	//validate username
24 | 	if (($uname = validate_username(mb_strtolower($_POST['uname'], 'UTF-8'))) === false) { //we want the login to be case insensitive
25 | 		$errors['uname'] = 'The Username is invalid';
26 | 	}
27 | }
28 | 
29 | //check if password is provided
30 | if (!isset($_POST['passwd']) || empty($_POST['passwd'])) {
31 | 	$errors['passwd'] = 'The Password is required';
32 | } else {
33 | 	//validate password
34 | 	
35 | 	if (($passwd = validate_password($_POST['passwd'])) === false) {
36 | 		$errors['passwd'] = 'The Password must be at least 8 characters';
37 | 	}
38 | }
39 | 
40 | //check for form field errors
41 | if (!empty($errors)) { //if there are any errors
42 | 	$_SESSION['login_errors'] = $errors; //set a session variable to pass them to the login form page
43 | }
44 | else { //if no errors try to login
45 | 	if (($res = login($uname, $passwd)) === false) { //if database error
46 | 		$errors['uname'] = 'An error has been occurred'; //we want it to appear above username field
47 | 		$_SESSION['login_errors'] = $errors; //set a session variable to pass them to the login form page
48 | 	}
49 | 	else if ($res === -1) { //if invalid username or password		
50 | 		$errors['uname'] = 'Invalid Username or Password'; //we want it to appear above username field
51 | 		$_SESSION['login_errors'] = $errors; //set a session variable to pass them to the login form page
52 | 	}
53 | 	else {
54 | 		if (get_last_page() !== false) {
55 | 			header('Location: http://'.get_last_page()); //after sucessful login return to the previous page
56 | 		}
57 | 		else {
58 | 			header('Location: ../'); //you can replace this redirect with one to the chat page of your site if you want
59 | 			die();
60 | 		}
61 | 	}
62 | }
63 | 
64 | //else redirect to the loggin form of the site
65 | header('Location: login_form.php'); //you can replace this redirect with one to the chat page of your site
66 | die();
67 | ?>


--------------------------------------------------------------------------------
/simple_chat/login_form.php:
--------------------------------------------------------------------------------
 1 | <?php
 2 | /**********************************************\
 3 | * Copyright (c) 2013 Manolis Agkopian          *
 4 | * See the file LICENCE for copying permission. *
 5 | \**********************************************/
 6 | 
 7 | session_start();
 8 | define('INCLUDED',true);
 9 | require 'includes/core_func.php';
10 | require 'includes/markup_func.php';
11 | 
12 | if (user_logged_in()) {
13 | 	if (get_last_page() !== false) {
14 | 		header('Location: http://'.get_last_page());
15 | 	}
16 | 	else {
17 | 		header('Location: ../');
18 | 	}
19 | 	die();
20 | }
21 | 
22 | $msg = '';
23 | if (isset($_GET['ref']) && !empty($_GET['ref']) && $_GET['ref'] === 'reg') {
24 | 	$msg = '<p id="message">You have been registered successfully! You can now login.</p>';
25 | }
26 | 
27 | $errors = array();
28 | if (isset($_SESSION['login_errors']) && !empty($_SESSION['login_errors'])) {
29 | 	$errors = $_SESSION['login_errors'];
30 | 	unset($_SESSION['login_errors']);
31 | }
32 | ?>
33 | <!DOCTYPE html">
34 | <html>
35 | 	<head>
36 | 		<title>Login Form</title>
37 | 		<meta charset="UTF-8">
38 | 		<link type="text/css" rel="stylesheet" href="css/chat_global.css">
39 | 		<style type="text/css">
40 | 			#uname,  #passwd, #submit_login{
41 | 				width: 318px;
42 | 				height: 50px;
43 | 				margin: 15px auto;
44 | 				display: block;
45 | 				font-size: 30px;
46 | 			}
47 | 			#message, #register_link{
48 | 				width: 318px;
49 | 				height: 50px;
50 | 				margin: 15px auto;
51 | 				display: block;
52 | 				font-weight: bold;
53 | 				text-align: center;
54 | 			}
55 | 			#title {
56 | 				margin-bottom: 15px;
57 | 			}
58 | 			#recaptcha_widget_div {
59 | 				width: 318px;
60 | 				height: 129px;
61 | 				margin: 15px auto;
62 | 			}
63 | 			#login_form {
64 | 				width: 500px;
65 | 				margin: 0 auto;
66 | 			}
67 | 			#container {
68 | 				margin-top: 100px;
69 | 			}
70 | 			.error {
71 | 				width: 318px;
72 | 				margin: 0 auto;
73 | 			}
74 | 		</style>
75 | 	</head>
76 | 	<body>
77 | 		<div id="wrapper">
78 | 			<div id="container">
79 | 				<div id="title">
80 | 					<h1>Login Form</h1>
81 | 				</div>
82 | 				<?=$msg?>
83 | 				<?php do_html_login_form($errors);?>
84 | 			</div>
85 | 		</div>
86 | 	</body>
87 | </html>


--------------------------------------------------------------------------------
/simple_chat/logout.php:
--------------------------------------------------------------------------------
 1 | <?php
 2 | /**********************************************\
 3 | * Copyright (c) 2013 Manolis Agkopian          *
 4 | * See the file LICENCE for copying permission. *
 5 | \**********************************************/
 6 | 
 7 | session_start();
 8 | define('INCLUDED',true);
 9 | require 'includes/core_func.php';
10 | 
11 | if (user_logged_in()) {
12 | 	$old_user = $_SESSION['uid'];
13 | 	unset($_SESSION['uid']);
14 | 	session_destroy();
15 | }
16 | 
17 | if (get_last_page() !== false) {
18 | 	header('Location: http://'.get_last_page());
19 | }
20 | else {
21 | 	header('Location: ../'); // or 'Location: login_form.php' if you want to redirect back to the login form after logout
22 | }
23 | ?>


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/simple_chat/media/smilies/biggrin.gif:
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https://raw.githubusercontent.com/magkopian/php-ajax-simple-chat/570ad61d92a61d02791b0c01b60404e4a6a01eaf/simple_chat/media/smilies/biggrin.gif


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/simple_chat/media/smilies/cool.gif:
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https://raw.githubusercontent.com/magkopian/php-ajax-simple-chat/570ad61d92a61d02791b0c01b60404e4a6a01eaf/simple_chat/media/smilies/cool.gif


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/simple_chat/media/smilies/mellow.gif:
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https://raw.githubusercontent.com/magkopian/php-ajax-simple-chat/570ad61d92a61d02791b0c01b60404e4a6a01eaf/simple_chat/media/smilies/mellow.gif


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/simple_chat/media/smilies/ohmy.gif:
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https://raw.githubusercontent.com/magkopian/php-ajax-simple-chat/570ad61d92a61d02791b0c01b60404e4a6a01eaf/simple_chat/media/smilies/ohmy.gif


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/simple_chat/media/smilies/sad.gif:
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https://raw.githubusercontent.com/magkopian/php-ajax-simple-chat/570ad61d92a61d02791b0c01b60404e4a6a01eaf/simple_chat/media/smilies/sad.gif


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/simple_chat/media/smilies/smile.gif:
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https://raw.githubusercontent.com/magkopian/php-ajax-simple-chat/570ad61d92a61d02791b0c01b60404e4a6a01eaf/simple_chat/media/smilies/smile.gif


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/simple_chat/media/smilies/tongue.gif:
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https://raw.githubusercontent.com/magkopian/php-ajax-simple-chat/570ad61d92a61d02791b0c01b60404e4a6a01eaf/simple_chat/media/smilies/tongue.gif


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/simple_chat/media/smilies/wink.gif:
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https://raw.githubusercontent.com/magkopian/php-ajax-simple-chat/570ad61d92a61d02791b0c01b60404e4a6a01eaf/simple_chat/media/smilies/wink.gif


--------------------------------------------------------------------------------
/simple_chat/recaptcha/LICENSE:
--------------------------------------------------------------------------------
 1 | Copyright (c) 2007 reCAPTCHA -- http://recaptcha.net
 2 | AUTHORS:
 3 |   Mike Crawford
 4 |   Ben Maurer
 5 | 
 6 | Permission is hereby granted, free of charge, to any person obtaining a copy
 7 | of this software and associated documentation files (the "Software"), to deal
 8 | in the Software without restriction, including without limitation the rights
 9 | to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
10 | copies of the Software, and to permit persons to whom the Software is
11 | furnished to do so, subject to the following conditions:
12 | 
13 | The above copyright notice and this permission notice shall be INCLUDED in
14 | all copies or substantial portions of the Software.
15 | 
16 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 | IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
19 | AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 | LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21 | OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
22 | THE SOFTWARE.
23 | 


--------------------------------------------------------------------------------
/simple_chat/recaptcha/recaptchalib.php:
--------------------------------------------------------------------------------
  1 | <?php
  2 | /*
  3 |  * This is a PHP library that handles calling reCAPTCHA.
  4 |  *    - Documentation and latest version
  5 |  *          http://recaptcha.net/plugins/php/
  6 |  *    - Get a reCAPTCHA API Key
  7 |  *          https://www.google.com/recaptcha/admin/create
  8 |  *    - Discussion group
  9 |  *          http://groups.google.com/group/recaptcha
 10 |  *
 11 |  * Copyright (c) 2007 reCAPTCHA -- http://recaptcha.net
 12 |  * AUTHORS:
 13 |  *   Mike Crawford
 14 |  *   Ben Maurer
 15 |  *
 16 |  * Permission is hereby granted, free of charge, to any person obtaining a copy
 17 |  * of this software and associated documentation files (the "Software"), to deal
 18 |  * in the Software without restriction, including without limitation the rights
 19 |  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 20 |  * copies of the Software, and to permit persons to whom the Software is
 21 |  * furnished to do so, subject to the following conditions:
 22 |  *
 23 |  * The above copyright notice and this permission notice shall be INCLUDED in
 24 |  * all copies or substantial portions of the Software.
 25 |  *
 26 |  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 27 |  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 28 |  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 29 |  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 30 |  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 31 |  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 32 |  * THE SOFTWARE.
 33 |  */
 34 | 
 35 | /**
 36 |  * The reCAPTCHA server URL's
 37 |  */
 38 | define("RECAPTCHA_API_SERVER", "http://www.google.com/recaptcha/api");
 39 | define("RECAPTCHA_API_SECURE_SERVER", "https://www.google.com/recaptcha/api");
 40 | define("RECAPTCHA_VERIFY_SERVER", "www.google.com");
 41 | 
 42 | /**
 43 |  * Encodes the given data into a query string format
 44 |  * @param $data - array of string elements to be encoded
 45 |  * @return string - encoded request
 46 |  */
 47 | function _recaptcha_qsencode ($data) {
 48 |         $req = "";
 49 |         foreach ( $data as $key => $value )
 50 |                 $req .= $key . '=' . urlencode( stripslashes($value) ) . '&';
 51 | 
 52 |         // Cut the last '&'
 53 |         $req=substr($req,0,strlen($req)-1);
 54 |         return $req;
 55 | }
 56 | 
 57 | 
 58 | 
 59 | /**
 60 |  * Submits an HTTP POST to a reCAPTCHA server
 61 |  * @param string $host
 62 |  * @param string $path
 63 |  * @param array $data
 64 |  * @param int port
 65 |  * @return array response
 66 |  */
 67 | function _recaptcha_http_post($host, $path, $data, $port = 80) {
 68 | 
 69 |         $req = _recaptcha_qsencode ($data);
 70 | 
 71 |         $http_request  = "POST $path HTTP/1.0\r\n";
 72 |         $http_request .= "Host: $host\r\n";
 73 |         $http_request .= "Content-Type: application/x-www-form-urlencoded;\r\n";
 74 |         $http_request .= "Content-Length: " . strlen($req) . "\r\n";
 75 |         $http_request .= "User-Agent: reCAPTCHA/PHP\r\n";
 76 |         $http_request .= "\r\n";
 77 |         $http_request .= $req;
 78 | 
 79 |         $response = '';
 80 |         if( false == ( $fs = @fsockopen($host, $port, $errno, $errstr, 10) ) ) {
 81 |                 die ('Could not open socket');
 82 |         }
 83 | 
 84 |         fwrite($fs, $http_request);
 85 | 
 86 |         while ( !feof($fs) )
 87 |                 $response .= fgets($fs, 1160); // One TCP-IP packet
 88 |         fclose($fs);
 89 |         $response = explode("\r\n\r\n", $response, 2);
 90 | 
 91 |         return $response;
 92 | }
 93 | 
 94 | 
 95 | 
 96 | /**
 97 |  * Gets the challenge HTML (javascript and non-javascript version).
 98 |  * This is called from the browser, and the resulting reCAPTCHA HTML widget
 99 |  * is embedded within the HTML form it was called from.
100 |  * @param string $pubkey A public key for reCAPTCHA
101 |  * @param string $error The error given by reCAPTCHA (optional, default is null)
102 |  * @param boolean $use_ssl Should the request be made over ssl? (optional, default is false)
103 | 
104 |  * @return string - The HTML to be embedded in the user's form.
105 |  */
106 | function recaptcha_get_html ($pubkey, $error = null, $use_ssl = false)
107 | {
108 | 	if ($pubkey == null || $pubkey == '') {
109 | 		die ("To use reCAPTCHA you must get an API key from <a href='https://www.google.com/recaptcha/admin/create'>https://www.google.com/recaptcha/admin/create</a>");
110 | 	}
111 | 	
112 | 	if ($use_ssl) {
113 |                 $server = RECAPTCHA_API_SECURE_SERVER;
114 |         } else {
115 |                 $server = RECAPTCHA_API_SERVER;
116 |         }
117 | 
118 |         $errorpart = "";
119 |         if ($error) {
120 |            $errorpart = "&amp;error=" . $error;
121 |         }
122 |         return '<script type="text/javascript" src="'. $server . '/challenge?k=' . $pubkey . $errorpart . '"></script>
123 | 
124 | 	<noscript>
125 |   		<iframe src="'. $server . '/noscript?k=' . $pubkey . $errorpart . '" height="300" width="500" frameborder="0"></iframe><br/>
126 |   		<textarea name="recaptcha_challenge_field" rows="3" cols="40"></textarea>
127 |   		<input type="hidden" name="recaptcha_response_field" value="manual_challenge"/>
128 | 	</noscript>';
129 | }
130 | 
131 | 
132 | 
133 | 
134 | /**
135 |  * A ReCaptchaResponse is returned from recaptcha_check_answer()
136 |  */
137 | class ReCaptchaResponse {
138 |         var $is_valid;
139 |         var $error;
140 | }
141 | 
142 | 
143 | /**
144 |   * Calls an HTTP POST function to verify if the user's guess was correct
145 |   * @param string $privkey
146 |   * @param string $remoteip
147 |   * @param string $challenge
148 |   * @param string $response
149 |   * @param array $extra_params an array of extra variables to post to the server
150 |   * @return ReCaptchaResponse
151 |   */
152 | function recaptcha_check_answer ($privkey, $remoteip, $challenge, $response, $extra_params = array())
153 | {
154 | 	if ($privkey == null || $privkey == '') {
155 | 		die ("To use reCAPTCHA you must get an API key from <a href='https://www.google.com/recaptcha/admin/create'>https://www.google.com/recaptcha/admin/create</a>");
156 | 	}
157 | 
158 | 	if ($remoteip == null || $remoteip == '') {
159 | 		die ("For security reasons, you must pass the remote ip to reCAPTCHA");
160 | 	}
161 | 
162 | 	
163 | 	
164 |         //discard spam submissions
165 |         if ($challenge == null || strlen($challenge) == 0 || $response == null || strlen($response) == 0) {
166 |                 $recaptcha_response = new ReCaptchaResponse();
167 |                 $recaptcha_response->is_valid = false;
168 |                 $recaptcha_response->error = 'incorrect-captcha-sol';
169 |                 return $recaptcha_response;
170 |         }
171 | 
172 |         $response = _recaptcha_http_post (RECAPTCHA_VERIFY_SERVER, "/recaptcha/api/verify",
173 |                                           array (
174 |                                                  'privatekey' => $privkey,
175 |                                                  'remoteip' => $remoteip,
176 |                                                  'challenge' => $challenge,
177 |                                                  'response' => $response
178 |                                                  ) + $extra_params
179 |                                           );
180 | 
181 |         $answers = explode ("\n", $response [1]);
182 |         $recaptcha_response = new ReCaptchaResponse();
183 | 
184 |         if (trim ($answers [0]) == 'true') {
185 |                 $recaptcha_response->is_valid = true;
186 |         }
187 |         else {
188 |                 $recaptcha_response->is_valid = false;
189 |                 $recaptcha_response->error = $answers [1];
190 |         }
191 |         return $recaptcha_response;
192 | 
193 | }
194 | 
195 | /**
196 |  * gets a URL where the user can sign up for reCAPTCHA. If your application
197 |  * has a configuration page where you enter a key, you should provide a link
198 |  * using this function.
199 |  * @param string $domain The domain where the page is hosted
200 |  * @param string $appname The name of your application
201 |  */
202 | function recaptcha_get_signup_url ($domain = null, $appname = null) {
203 | 	return "https://www.google.com/recaptcha/admin/create?" .  _recaptcha_qsencode (array ('domains' => $domain, 'app' => $appname));
204 | }
205 | 
206 | function _recaptcha_aes_pad($val) {
207 | 	$block_size = 16;
208 | 	$numpad = $block_size - (strlen ($val) % $block_size);
209 | 	return str_pad($val, strlen ($val) + $numpad, chr($numpad));
210 | }
211 | 
212 | /* Mailhide related code */
213 | 
214 | function _recaptcha_aes_encrypt($val,$ky) {
215 | 	if (! function_exists ("mcrypt_encrypt")) {
216 | 		die ("To use reCAPTCHA Mailhide, you need to have the mcrypt php module installed.");
217 | 	}
218 | 	$mode=MCRYPT_MODE_CBC;   
219 | 	$enc=MCRYPT_RIJNDAEL_128;
220 | 	$val=_recaptcha_aes_pad($val);
221 | 	return mcrypt_encrypt($enc, $ky, $val, $mode, "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0");
222 | }
223 | 
224 | 
225 | function _recaptcha_mailhide_urlbase64 ($x) {
226 | 	return strtr(base64_encode ($x), '+/', '-_');
227 | }
228 | 
229 | /* gets the reCAPTCHA Mailhide url for a given email, public key and private key */
230 | function recaptcha_mailhide_url($pubkey, $privkey, $email) {
231 | 	if ($pubkey == '' || $pubkey == null || $privkey == "" || $privkey == null) {
232 | 		die ("To use reCAPTCHA Mailhide, you have to sign up for a public and private key, " .
233 | 		     "you can do so at <a href='http://www.google.com/recaptcha/mailhide/apikey'>http://www.google.com/recaptcha/mailhide/apikey</a>");
234 | 	}
235 | 	
236 | 
237 | 	$ky = pack('H*', $privkey);
238 | 	$cryptmail = _recaptcha_aes_encrypt ($email, $ky);
239 | 	
240 | 	return "http://www.google.com/recaptcha/mailhide/d?k=" . $pubkey . "&c=" . _recaptcha_mailhide_urlbase64 ($cryptmail);
241 | }
242 | 
243 | /**
244 |  * gets the parts of the email to expose to the user.
245 |  * eg, given johndoe@example,com return ["john", "example.com"].
246 |  * the email is then displayed as john...@example.com
247 |  */
248 | function _recaptcha_mailhide_email_parts ($email) {
249 | 	$arr = preg_split("/@/", $email );
250 | 
251 | 	if (strlen ($arr[0]) <= 4) {
252 | 		$arr[0] = substr ($arr[0], 0, 1);
253 | 	} else if (strlen ($arr[0]) <= 6) {
254 | 		$arr[0] = substr ($arr[0], 0, 3);
255 | 	} else {
256 | 		$arr[0] = substr ($arr[0], 0, 4);
257 | 	}
258 | 	return $arr;
259 | }
260 | 
261 | /**
262 |  * Gets html to display an email address given a public an private key.
263 |  * to get a key, go to:
264 |  *
265 |  * http://www.google.com/recaptcha/mailhide/apikey
266 |  */
267 | function recaptcha_mailhide_html($pubkey, $privkey, $email) {
268 | 	$emailparts = _recaptcha_mailhide_email_parts ($email);
269 | 	$url = recaptcha_mailhide_url ($pubkey, $privkey, $email);
270 | 	
271 | 	return htmlentities($emailparts[0]) . "<a href='" . htmlentities ($url) .
272 | 		"' onclick=\"window.open('" . htmlentities ($url) . "', '', 'toolbar=0,scrollbars=0,location=0,statusbar=0,menubar=0,resizable=0,width=500,height=300'); return false;\" title=\"Reveal this e-mail address\">...</a>@" . htmlentities ($emailparts [1]);
273 | 
274 | }
275 | 
276 | 
277 | ?>
278 | 


--------------------------------------------------------------------------------
/simple_chat/register.php:
--------------------------------------------------------------------------------
 1 | <?php
 2 | /**********************************************\
 3 | * Copyright (c) 2013 Manolis Agkopian          *
 4 | * See the file LICENCE for copying permission. *
 5 | \**********************************************/
 6 | 
 7 | session_start();
 8 | define('INCLUDED',true);
 9 | require 'includes/core_func.php';
10 | require 'includes/validation_func.php';
11 | 
12 | if (user_logged_in()) {
13 | 	header('Location: ../');
14 | 	die();
15 | }
16 | 
17 | $errors = array();
18 | 
19 | //check if username is provided
20 | if (!isset($_POST['uname']) || empty($_POST['uname'])) {
21 | 	$errors['uname'] = 'The Username is required';
22 | } else {
23 | 	//validate username
24 | 	if (($uname = validate_username($_POST['uname'])) === false) {
25 | 		$errors['uname'] = 'The Username is invalid';
26 | 	}
27 | }
28 | 
29 | //check if password is provided
30 | if (!isset($_POST['passwd']) || empty($_POST['passwd'])) {
31 | 	$errors['passwd'] = 'The Password is required';
32 | } else {
33 | 	//validate password
34 | 	
35 | 	if (($passwd = validate_password($_POST['passwd'])) === false) {
36 | 		$errors['passwd'] = 'The Password must be at least 8 characters';
37 | 	}
38 | }
39 | 
40 | //check if recaptcha is provided
41 | if (!isset($_POST['recaptcha_challenge_field']) || empty($_POST['recaptcha_challenge_field']) || 
42 | 	!isset($_POST['recaptcha_response_field']) || empty($_POST['recaptcha_response_field'])) {
43 | 	$errors['recaptcha'] = 'The reCAPTCHA is required';
44 | }
45 | else {
46 | 	//validate recaptcha
47 | 	if (validate_recaptcha($_POST['recaptcha_challenge_field'], $_POST['recaptcha_response_field']) === false) {
48 | 		$errors['recaptcha'] = 'The reCAPTCHA wasn\'t entered correctly.';
49 | 	}		
50 | }
51 | 
52 | 
53 | //check for form field errors
54 | if (!empty($errors)) { //if there are any errors
55 | 	$_SESSION['reg_errors'] = $errors; //set a session variable to pass them to the registration form page
56 | }
57 | else { //if no errors try to register
58 | 	if (($res = register($uname, $passwd)) === false) { //if database error
59 | 		$errors['uname'] = 'An error has been occurred'; //we want it to appear above username field
60 | 		$_SESSION['reg_errors'] = $errors; //set a session variable to pass them to the registration form page
61 | 	}
62 | 	else if ($res === -1) { //if user already exists	
63 | 		$errors['uname'] = 'Username already exists'; //we want it to appear above username field
64 | 		$_SESSION['reg_errors'] = $errors; //set a session variable to pass them to the registration form page
65 | 	}
66 | 	else {
67 | 		if (get_last_page() !== false) {
68 | 			header('Location: login_form.php?ref=reg'); //after sucessful register goto the login page
69 | 			die();
70 | 		}
71 | 		else {
72 | 			header('Location: ../'); //you can replace this redirect with one to the chat page of your site if you want
73 | 			die();
74 | 		}
75 | 	}
76 | }
77 | 
78 | //else redirect to the registration form of the site
79 | header('Location: register_form.php'); //you can replace this redirect with one to the chat page of your site
80 | die();
81 | ?>


--------------------------------------------------------------------------------
/simple_chat/register_form.php:
--------------------------------------------------------------------------------
 1 | <?php
 2 | /**********************************************\
 3 | * Copyright (c) 2013 Manolis Agkopian          *
 4 | * See the file LICENCE for copying permission. *
 5 | \**********************************************/
 6 | 
 7 | session_start();
 8 | define('INCLUDED',true);
 9 | require 'includes/core_func.php';
10 | require 'includes/markup_func.php';
11 | 
12 | if (user_logged_in()) {
13 | 	if (get_last_page() !== false) {
14 | 		header('Location: http://'.get_last_page());
15 | 	}
16 | 	else {
17 | 		header('Location: ../');
18 | 	}
19 | 	die();
20 | }
21 | 
22 | $errors = array();
23 | if (isset($_SESSION['reg_errors']) && !empty($_SESSION['reg_errors'])) {
24 | 	$errors = $_SESSION['reg_errors'];
25 | 	unset($_SESSION['reg_errors']);
26 | }
27 | ?>
28 | <!DOCTYPE html">
29 | <html>
30 | 	<head>
31 | 		<title>Registration Form</title>
32 | 		<meta charset="UTF-8">
33 | 		<link type="text/css" rel="stylesheet" href="css/chat_global.css">
34 | 		<style type="text/css">
35 | 			#uname,  #passwd, #submit_register{
36 | 				width: 318px;
37 | 				height: 50px;
38 | 				margin: 15px auto;
39 | 				display: block;
40 | 				font-size: 30px;
41 | 			}
42 | 			#login_link{
43 | 				width: 318px;
44 | 				height: 50px;
45 | 				margin: 15px auto;
46 | 				text-align: center;
47 | 			}
48 | 			#title {
49 | 				margin-bottom: 15px;
50 | 			}
51 | 			#recaptcha_widget_div {
52 | 				width: 318px;
53 | 				height: 129px;
54 | 				margin: 15px auto;
55 | 			}
56 | 			#login_form {
57 | 				width: 500px;
58 | 				margin: 0 auto;
59 | 			}
60 | 			#container {
61 | 				margin-top: 100px;
62 | 			}
63 | 			.error {
64 | 				width: 318px;
65 | 				margin: 0 auto;
66 | 			}
67 | 		</style>
68 | 	</head>
69 | 	<body>
70 | 		<div id="wrapper">
71 | 			<div id="container">
72 | 				<div id="title">
73 | 					<h1>Registration Form</h1>
74 | 				</div>
75 | 				<?php do_html_register_form($errors);?>
76 | 			</div>
77 | 		</div>
78 | 	</body>
79 | </html>


--------------------------------------------------------------------------------
/sql/simple_chat.sql:
--------------------------------------------------------------------------------
 1 | SET SQL_MODE="NO_AUTO_VALUE_ON_ZERO";
 2 | SET time_zone = "+00:00";
 3 | 
 4 | 
 5 | /*!40101 SET @OLD_CHARACTER_SET_CLIENT=@@CHARACTER_SET_CLIENT */;
 6 | /*!40101 SET @OLD_CHARACTER_SET_RESULTS=@@CHARACTER_SET_RESULTS */;
 7 | /*!40101 SET @OLD_COLLATION_CONNECTION=@@COLLATION_CONNECTION */;
 8 | /*!40101 SET NAMES utf8 */;
 9 | 
10 | CREATE TABLE IF NOT EXISTS `message` (
11 |   `mid` int(10) unsigned NOT NULL AUTO_INCREMENT,
12 |   `content` varchar(255) DEFAULT NULL,
13 |   `uid` int(10) unsigned NOT NULL,
14 |   `time` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP,
15 |   PRIMARY KEY (`mid`),
16 |   KEY `uid` (`uid`)
17 | ) ENGINE=InnoDB  DEFAULT CHARSET=utf8 AUTO_INCREMENT=1 ;
18 | 
19 | 
20 | CREATE TABLE IF NOT EXISTS `user` (
21 |   `uid` int(10) unsigned NOT NULL AUTO_INCREMENT,
22 |   `uname` varchar(25) NOT NULL,
23 |   `passwd` varchar(64) NOT NULL,
24 |   PRIMARY KEY (`uid`),
25 |   UNIQUE KEY `uname` (`uname`),
26 |   KEY `passwd` (`passwd`)
27 | ) ENGINE=InnoDB  DEFAULT CHARSET=utf8 AUTO_INCREMENT=1 ;
28 | 
29 | 
30 | ALTER TABLE `message`
31 |   ADD CONSTRAINT `message_ibfk_1` FOREIGN KEY (`uid`) REFERENCES `user` (`uid`);
32 | 
33 | /*!40101 SET CHARACTER_SET_CLIENT=@OLD_CHARACTER_SET_CLIENT */;
34 | /*!40101 SET CHARACTER_SET_RESULTS=@OLD_CHARACTER_SET_RESULTS */;
35 | /*!40101 SET COLLATION_CONNECTION=@OLD_COLLATION_CONNECTION */;
36 | 


--------------------------------------------------------------------------------