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romanitalian/SoundIndex.php

Created May 19, 2015 08:27
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Receiving a md5 of an arbitrary string sound. Use: SoundIndex::get('some string la-la');
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SoundIndex.php
<?php
/**
* Class SoundIndex
* Use: SoundIndex::get('some string la-la');
*/
class SoundIndex
{
protected static function _sound($string, $is_cyrillic = true) {
static $codes = array(
'A' => array(array(0, -1, -1),
'I' => array(array(0, 1, -1)),
'J' => array(array(0, 1, -1)),
'Y' => array(array(0, 1, -1)),
'U' => array(array(0, 7, -1))),
'B' => array(array(7, 7, 7)),
'C' => array(array(5, 5, 5), array(4, 4, 4),
'Z' => array(array(4, 4, 4),
'S' => array(array(4, 4, 4))),
'S' => array(array(4, 4, 4),
'Z' => array(array(4, 4, 4))),
'K' => array(array(5, 5, 5), array(45, 45, 45)),
'H' => array(array(5, 5, 5), array(4, 4, 4),
'S' => array(array(5, 54, 54)))),
'D' => array(array(3, 3, 3),
'T' => array(array(3, 3, 3)),
'Z' => array(array(4, 4, 4),
'H' => array(array(4, 4, 4)),
'S' => array(array(4, 4, 4))),
'S' => array(array(4, 4, 4),
'H' => array(array(4, 4, 4)),
'Z' => array(array(4, 4, 4))),
'R' => array(
'S' => array(array(4, 4, 4)),
'Z' => array(array(4, 4, 4)))),
'E' => array(array(0, -1, -1),
'I' => array(array(0, 1, -1)),
'J' => array(array(0, 1, -1)),
'Y' => array(array(0, 1, -1)),
'U' => array(array(1, 1, -1))),
'F' => array(array(7, 7, 7),
'B' => array(array(7, 7, 7))),
'G' => array(array(5, 5, 5)),
'H' => array(array(5, 5, -1)),
'I' => array(array(0, -1, -1),
'A' => array(array(1, -1, -1)),
'E' => array(array(1, -1, -1)),
'O' => array(array(1, -1, -1)),
'U' => array(array(1, -1, -1))),
'J' => array(array(4, 4, 4)),
'K' => array(array(5, 5, 5),
'H' => array(array(5, 5, 5)),
'S' => array(array(5, 54, 54))),
'L' => array(array(8, 8, 8)),
'M' => array(array(6, 6, 6),
'N' => array(array(66, 66, 66))),
'N' => array(array(6, 6, 6),
'M' => array(array(66, 66, 66))),
'O' => array(array(0, -1, -1),
'I' => array(array(0, 1, -1)),
'J' => array(array(0, 1, -1)),
'Y' => array(array(0, 1, -1))),
'P' => array(array(7, 7, 7),
'F' => array(array(7, 7, 7)),
'H' => array(array(7, 7, 7))),
'Q' => array(array(5, 5, 5)),
'R' => array(array(9, 9, 9),
'Z' => array(array(94, 94, 94), array(94, 94, 94)), // special case
'S' => array(array(94, 94, 94), array(94, 94, 94))), // special case
'S' => array(array(4, 4, 4),
'Z' => array(array(4, 4, 4),
'T' => array(array(2, 43, 43)),
'C' => array(
'Z' => array(array(2, 4, 4)),
'S' => array(array(2, 4, 4))),
'D' => array(array(2, 43, 43))),
'D' => array(array(2, 43, 43)),
'T' => array(array(2, 43, 43),
'R' => array(
'Z' => array(array(2, 4, 4)),
'S' => array(array(2, 4, 4))),
'C' => array(
'H' => array(array(2, 4, 4))),
'S' => array(
'H' => array(array(2, 4, 4)),
'C' => array(
'H' => array(array(2, 4, 4))))),
'C' => array(array(2, 4, 4),
'H' => array(array(4, 4, 4),
'T' => array(array(2, 43, 43),
'S' => array(
'C' => array(
'H' => array(array(2, 4, 4))),
'H' => array(array(2, 4, 4))),
'C' => array(
'H' => array(array(2, 4, 4)))),
'D' => array(array(2, 43, 43)))),
'H' => array(array(4, 4, 4),
'T' => array(array(2, 43, 43),
'C' => array(
'H' => array(array(2, 4, 4))),
'S' => array(
'H' => array(array(2, 4, 4)))),
'C' => array(
'H' => array(array(2, 4, 4))),
'D' => array(array(2, 43, 43)))),
'T' => array(array(3, 3, 3),
'C' => array(array(4, 4, 4),
'H' => array(array(4, 4, 4))),
'Z' => array(array(4, 4, 4),
'S' => array(array(4, 4, 4))),
'S' => array(array(4, 4, 4),
'Z' => array(array(4, 4, 4)),
'H' => array(array(4, 4, 4)),
'C' => array(
'H' => array(array(4, 4, 4)))),
'T' => array(
'S' => array(array(4, 4, 4),
'Z' => array(array(4, 4, 4)),
'C' => array(
'H' => array(array(4, 4, 4)))),
'C' => array(
'H' => array(array(4, 4, 4))),
'Z' => array(array(4, 4, 4))),
'H' => array(array(3, 3, 3)),
'R' => array(
'Z' => array(array(4, 4, 4)),
'S' => array(array(4, 4, 4)))),
'U' => array(array(0, -1, -1),
'E' => array(array(0, -1, -1)),
'I' => array(array(0, 1, -1)),
'J' => array(array(0, 1, -1)),
'Y' => array(array(0, 1, -1))),
'V' => array(array(7, 7, 7)),
'W' => array(array(7, 7, 7)),
'X' => array(array(5, 54, 54)),
'Y' => array(array(1, -1, -1)),
'Z' => array(array(4, 4, 4),
'D' => array(array(2, 43, 43),
'Z' => array(array(2, 4, 4),
'H' => array(array(2, 4, 4)))),
'H' => array(array(4, 4, 4),
'D' => array(array(2, 43, 43),
'Z' => array(
'H' => array(array(2, 4, 4))))),
'S' => array(array(4, 4, 4),
'H' => array(array(4, 4, 4)),
'C' => array(
'H' => array(array(4, 4, 4))))));
$length = strlen($string);
$output = '';
$i = 0;
$previous = -1;
while($i < $length) {
$current = $last = &$codes[$string[$i]];
for($j = $k = 1; $k < 7; $k++) {
if(!isset($string[$i + $k]) ||
!isset($current[$string[$i + $k]])
)
break;
$current = &$current[$string[$i + $k]];
if(isset($current[0])) {
$last = &$current;
$j = $k + 1;
}
}
if($i == 0) {
$code = $last[0][0];
} elseif(!isset($string[$i + $j]) || ($codes[$string[$i + $j]][0][0] != 0))
$code = $is_cyrillic ? (isset($last[1]) ? $last[1][2] : $last[0][2]) : $last[0][2];
else
$code = $is_cyrillic ? (isset($last[1]) ? $last[1][1] : $last[0][1]) : $last[0][1];
if(($code != -1) && ($code != $previous))
$output .= $code;
$previous = $code;
$i += $j;
}
return str_pad(substr($output, 0, 6), 6, '0');
}
//------------------------------------------------------------------------------
/**
* @param $string
* @return array|null decimal sound index of all words in input string
*/
public static function sound($string) {
$is_cyrillic = false;
if(preg_match('#[А-Яа-я]#i', $string) === 1) {
$string = self::translit($string);
$is_cyrillic = true;
}
$string = preg_replace(array('#[^\w\s]|\d#i', '#\b[^\s]{1,3}\b#i', '#\s{2,}#i', '#^\s+|\s+$#i'),
array('', '', ' '), strtoupper($string));
if(!isset($string[0]))
return null;
$matches = explode(' ', $string);
foreach($matches as $key => $match)
$matches[$key] = self::_sound($match, $is_cyrillic);
return $matches;
}
//------------------------------------------------------------------------------
protected static function translit($string) {
static $ru = array(
'А', 'а', 'Б', 'б', 'В', 'в', 'Г', 'г', 'Д', 'д', 'Е', 'е', 'Ё', 'ё', 'Ж', 'ж', 'З', 'з',
'И', 'и', 'Й', 'й', 'К', 'к', 'Л', 'л', 'М', 'м', 'Н', 'н', 'О', 'о', 'П', 'п', 'Р', 'р',
'С', 'с', 'Т', 'т', 'У', 'у', 'Ф', 'ф', 'Х', 'х', 'Ц', 'ц', 'Ч', 'ч', 'Ш', 'ш', 'Щ', 'щ',
'Ъ', 'ъ', 'Ы', 'ы', 'Ь', 'ь', 'Э', 'э', 'Ю', 'ю', 'Я', 'я'
);
static $en = array(
'A', 'a', 'B', 'b', 'V', 'v', 'G', 'g', 'D', 'd', 'E', 'e', 'E', 'e', 'Zh', 'zh', 'Z', 'z',
'I', 'i', 'J', 'j', 'K', 'k', 'L', 'l', 'M', 'm', 'N', 'n', 'O', 'o', 'P', 'p', 'R', 'r',
'S', 's', 'T', 't', 'U', 'u', 'F', 'f', 'H', 'h', 'C', 'c', 'Ch', 'ch', 'Sh', 'sh', 'Sch', 'sch',
'\'', '\'', 'Y', 'y', '\'', '\'', 'E', 'e', 'Ju', 'ju', 'Ja', 'ja'
);
$string = str_replace($ru, $en, $string);
return $string;
}
public static function sound_hash($s) {
return md5(serialize(self::sound($s)));
}
public static function get($s) {
$s = str_replace('-', ' ', $s);
return md5(metaphone(SoundIndex::translit($s)).preg_replace("/[^0-9]/", "", $s));
}
}
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