<?php
/**
* CLASS phonex
* phonex, phonetics search algo
* based on the algorithm described here : http://sqlpro.developpez.com/cours/soundex/ by Frédéric BROUARD
*
* author Johan Barbier <[email protected]>
*/
class phonex {
/**
* The public string we will work on
*/
public $sString = '';
/**
* private replacement array
*/
private $aReplaceGrp1 = array (
'gan' => 'kan',
'gam' => 'kam',
'gain' => 'kain',
'gaim' => 'kaim'
);
/**
* private replacement array
*/
private $aReplaceGrp2 = array (
'/(ain)([aeiou])/' => 'yn$2',
'/(ein)([aeiou])/'=> 'yn$2',
'/(aim)([aeiou])/' => 'yn$2',
'/(eim)([aeiou])/'=> 'yn$2',
);
/**
* private replacement array
*/
private $aReplaceGrp3 = array (
'eau' => 'o',
'oua' => '2',
'ein' => '4',
'ain' => '4',
'eim' => '4',
'aim' => '4'
);
/**
* private replacement array
*/
private $aReplaceGrp4 = array (
'é' => 'y',
'è' => 'y',
'ê' => 'y',
'ai' => 'y',
'ei' => 'y',
'er' => 'yr',
'ess' => 'yss',
'et' => 'yt'
);
/**
* private replacement array
*/
private $aReplaceGrp5 = array (
'/(an)($|[^aeiou1234])/' => '1$2',
'/(am)($|[^aeiou1234])/' => '1$2',
'/(en)($|[^aeiou1234])/' => '1$2',
'/(em)($|[^aeiou1234])/' => '1$2',
'/(in)($|[^aeiou1234])/' => '4$2'
);
/**
* private replacement array
*/
private $aReplaceGrp6 = array (
'on' => '1'
);
/**
* private replacement array
*/
private $aReplaceGrp7 = array (
'/([aeiou1234])(s)([aeiou1234])/' => '$1z$3'
);
/**
* private replacement array
*/
private $aReplaceGrp8 = array (
'oe' => 'e',
'eu' => 'e',
'au' => 'o',
'oi' => '2',
'oy' => '2',
'ou' => '3'
);
/**
* private replacement array
*/
private $aReplaceGrp9 = array (
'ch' => '5',
'sch' => '5',
'sh' => '5',
'ss' => 's',
'sc' => 's'
);
/**
* private replacement array
*/
private $aReplaceGrp10 = array (
'/(c)([ei])/' => 's$2'
);
/**
* private replacement array
*/
private $aReplaceGrp11 = array (
'c' => 'k',
'q' => 'k',
'qu' => 'k',
'gu' => 'k',
'ga' => 'ka',
'go' => 'ko',
'gy' => 'ky'
);
/**
* private replacement array
*/
private $aReplaceGrp12 = array (
'a' => 'o',
'd' => 't',
'p' => 't',
'j' => 'g',
'b' => 'f',
'v' => 'f',
'm' => 'n'
);
/**
* private replacement array
*/
private static $aReplaceGrp13 = array (
'1',
'2',
'3',
'4',
'5',
'e',
'f',
'g',
'h',
'i',
'k',
'l',
'n',
'o',
'r',
's',
't',
'u',
'w',
'x',
'y',
'z'
);
/**
* private replacement array
*/
private $aEnd = array (
't',
'x'
);
/**
* public function build ()
* main method, building the phonex code of a given string
* @Param string sString : the string!
*/
public function build ($sString) {
if (is_string ($sString) && !empty ($sString)) {
$this -> sString = $sString;
} else {
trigger_error ('Parameter string must not be empty', E_USER_ERROR);
}
$this -> sString = strtolower ($this -> sString);
$this -> sString = str_replace (' ', '', $this -> sString);
$this -> sString = str_replace ('y', 'i', $this -> sString);
$this -> sString = preg_replace ('/(?<![csp])h/', '', $this -> sString);
$this -> sString = str_replace ('ph', 'f', $this -> sString);
$this -> aReplace ($this -> aReplaceGrp1);
$this -> aReplace ($this -> aReplaceGrp2, true);
$this -> aReplace ($this -> aReplaceGrp3);
$this -> aReplace ($this -> aReplaceGrp4);
$this -> aReplace ($this -> aReplaceGrp5, true);
$this -> aReplace ($this -> aReplaceGrp6);
$this -> aReplace ($this -> aReplaceGrp7, true);
$this -> aReplace ($this -> aReplaceGrp8);
$this -> aReplace ($this -> aReplaceGrp9);
$this -> aReplace ($this -> aReplaceGrp10, true);
$this -> aReplace ($this -> aReplaceGrp11);
$this -> aReplace ($this -> aReplaceGrp12);
$this -> sString = preg_replace( '/(.)\1/', '$1', $this -> sString );
$this -> trimLast ();
$this -> getNum ();
}
/**
* private function aReplace ()
* method used to replace letters, given an array
* @Param array aTab : the replacement array to be used
* @Param bool bPreg : is the array an array of regular expressions patterns : true => yes`| false => no
*/
private function aReplace (array $aTab, $bPreg = false) {
if (false === $bPreg) {
$this -> sString = str_replace (array_keys ($aTab), array_values ($aTab), $this -> sString);
} else {
$this -> sString = preg_replace (array_keys ($aTab), array_values ($aTab), $this -> sString);
}
}
/**
* private function trimLast ()
* method to trim the bad endings
*/
private function trimLast () {
$length = strlen ($this -> sString) - 1;
if (in_array ($this -> sString{$length}, $this -> aEnd)) {
$this -> sString = substr ($this -> sString, 0, $length);
}
}
/**
* private static function mapNum ()
* callback method to create the phonex numeric code, base 22
* @Param int val : current value
* @Param int clef : current key
* @Returns int num : the calculated base 22 value
*/
private static function mapNum ($val, $clef) {
$num = array_search ($val, self::$aReplaceGrp13);
$num *= pow (22, - ($clef + 1));
return $num;
}
/**
* private function getNum ()
* method to get a numeric array from the main string
* we call the callback function mapNum and we sum all the values of the obtained array to get the final phonex code
*/
private function getNum () {
$aString = str_split ($this -> sString);
$aNum = array_map (array ('self', 'mapNum'), array_values ($aString), array_keys ($aString));
$this -> sString = (string) array_sum ($aNum);
}
}
?>
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