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<?php |
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/** |
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* |
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* @Name : similar-text |
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* @Programmer : Akpé Aurelle Emmanuel Moïse Zinsou |
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* @Date : 2019-04-01 |
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* @Released under : https://github.com/manuwhat/similar-text/blob/master/LICENSE |
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* @Repository : https://github.com/manuwhat/similar |
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* |
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**/ |
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namespace{ |
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function SimilarText( |
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$firstString, |
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$secondString, |
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$round=2, |
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$insensitive=true, |
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&$stats=false, |
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$getParts=false |
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) { |
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return EZAMA\similar_text::similarText( |
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$firstString, |
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$secondString, |
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$round, |
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$insensitive, |
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$stats, |
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$getParts |
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); |
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} |
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function areAnagrams($a, $b) |
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{ |
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return EZAMA\similar_text::areAnagrams($a, $b); |
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} |
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function similarButNotEqual($a, $b) |
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{ |
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return EZAMA\similar_text::similarButNotEqual($a, $b); |
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} |
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} |
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namespace EZAMA{ |
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class similar_text |
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{ |
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private function __construct() |
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{ |
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} |
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public static function similarText($a, $b, $round=2, $insensitive=true, &$stats=false, $getParts=false) |
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{ |
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if (!is_string($a)||!is_string($b)) { |
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return false; |
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} |
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if ($insensitive) { |
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$a=self::strtolower($a); |
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$b=self::strtolower($b); |
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} |
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/* prevent bad types and useless memory usage due to for example array instead of simple boolean */ |
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unset($insensitive); |
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$getParts=(bool)$getParts; |
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/* ******************************************************************************************** */ |
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$a=self::split($a); |
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$b=self::split($b); |
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$ca=count($a); |
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$cb=count($b); |
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if ($ca<$cb) { |
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$stats=self::getStats($cb, $a, self::_check($a, $b, $getParts, $round), $getParts, $round); |
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} else { |
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$stats=self::getStats($ca, $b, self::_check($b, $a, $getParts, $round), $getParts, $round); |
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} |
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return $stats['similar']; |
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} |
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protected static function _check($a, $b, $getParts, $round) |
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{ |
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if ($getParts) { |
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$diff[]=array_diff($a, $b); |
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$diff[]=array_diff($b, $a); |
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} |
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$diff[]=array_intersect($a, $b); |
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$diff[]=round(count(array_intersect(self::getParts($a, $c), self::getParts($b)))/$c*100, $round); |
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$diff[]=$a===$b; |
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return $diff; |
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} |
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protected static function getStats($ca, $b, $diff, $getParts, $round) |
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{ |
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if ($getParts) { |
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$stats['similar']=round(count($diff[2])*100/$ca, $round); |
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$stats['substr']=$diff[3]; |
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$stats['contain']=($diff[2]===$b)?true:false; |
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$stats['equal']=$diff[4]; |
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$stats['a-b']=$diff[0]; |
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$stats['b-a']=$diff[1]; |
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$stats['a&b']=$diff[2]; |
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} else { |
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$stats['similar']=round(count($diff[0])*100/$ca, $round); |
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$stats['substr']=$diff[1]; |
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$stats['contain']=($diff[0]===$b)?true:false; |
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$stats['equal']=$diff[2]; |
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} |
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return $stats; |
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} |
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protected static function getParts($b, &$c=0) |
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{ |
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$tmp=''; |
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$c=0; |
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foreach ($b as $k=>$v) { |
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$tmp.=$v; |
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if (ctype_space($v)) { |
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$parts[]=$tmp; |
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$parts[]=$v; |
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$c+=2; |
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$tmp=''; |
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} |
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} |
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if (!empty($tmp)) { |
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$parts[]=$tmp; |
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$c++; |
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} |
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return $parts; |
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} |
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protected static function is_ascii($str) |
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{ |
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if ('' === $str) { |
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return true; |
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} |
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return !preg_match('/[^\x09\x10\x13\x0A\x0D\x20-\x7E]/', $str); |
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} |
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protected static function strtolower($str) |
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{ |
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return join( |
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array_map( |
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function ($val) { |
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if (self::is_ascii($val)) { |
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return strtolower($val); |
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} |
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return $val; |
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}, |
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self::split($str) |
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) |
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) |
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; |
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} |
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protected static function split($str) |
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{ |
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if (!is_string($str)) { |
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return false; |
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} |
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static $split=[]; |
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static $old=''; |
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if ($old===$str) { |
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return $split; |
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} else { |
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$old=$str; |
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$split=preg_split('//u', $str, -1, PREG_SPLIT_NO_EMPTY); |
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return $split; |
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} |
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} |
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public static function areAnagrams($a, $b) |
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{ |
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return self::similarText($a, $b, 2, true, $check)?$check['similar'] === 100.0&&$check['contain']===true:false; |
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} |
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public static function similarButNotEqual($a, $b) |
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{ |
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return self::similarText($a, $b, 2, true, $check)&&is_array($check)&&$check['equal']===true?false:true; |
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} |
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} |
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} |
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manuwhat /
similar-text
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