├── README.md
└── SoundsLike.php


/README.md:
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1 | # php-sounds-like-search
2 | PHP Sounds Like Search Class
3 | 
4 | Usage and background:
5 | https://www.codepunker.com/blog/implement-a-sounds-like-search-in-php
6 | 


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/SoundsLike.php:
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 1 | <?php 
 2 |   class SoundsLike
 3 |   {
 4 | 
 5 |     private $searchAgainst = array();
 6 |     private $input;
 7 | 
 8 |     /**
 9 |     *@param $searchAgainst - an array of strings to match agains $input
10 |     *@param $input - the string for which the class finds the closest match in $searchAgainst
11 |     */
12 |     public function __construct($searchAgainst, $input)
13 |     {
14 |       $this->searchAgainst = $searchAgainst;
15 |       $this->input = $input;
16 |     }
17 | 
18 |     /**
19 |     *@param $phrase - string
20 |     *@return an array of metaphones for each word in a string
21 |     */
22 |     private function getMetaPhone($phrase)
23 |     {
24 |       $metaphones = array();
25 |       $words = str_word_count($phrase, 1);
26 |       foreach ($words as $word) {
27 |         $metaphones[] = metaphone($word);
28 |       }
29 |       return $metaphones;
30 |     }
31 | 
32 |     /**
33 |     *@return the closest matching string found in $this->searchAgainst when compared to $this->input
34 |     */
35 |     public function findBestMatch()
36 |     {
37 |       $foundbestmatch = -1;
38 | 
39 |       //get the metaphone equivalent for the input phrase
40 |       $tempInput = implode(' ', $this->getMetaPhone($this->input));
41 | 
42 |       foreach ($this->searchAgainst as $phrase)
43 |       {
44 |         //get the metaphone equivalent for each phrase we're searching against
45 |         $tempSearchAgainst = implode(' ', $this->getMetaPhone($phrase));
46 |         $similarity = levenshtein($tempInput, $tempSearchAgainst);
47 | 
48 |         if ($similarity == 0) // we found an exact match
49 |         {
50 |           $closest = $phrase;
51 |           $foundbestmatch = 0;
52 |           break;
53 |         }
54 | 
55 |         if ($similarity <= $foundbestmatch || $foundbestmatch < 0)
56 |         {
57 |           $closest  = $phrase;
58 |           $foundbestmatch = $similarity;
59 |         }
60 |       }
61 | 
62 |       return $closest;
63 |     }
64 | 
65 |   }
66 | 


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