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<?php $input = 'S1G5AB'; // given this $store = '5I6GAB'; // actually this $regex = implode('', array_map(function ($x) { return $x; }, str_split($input))); /* $regex = implode('', array_map( function ($char) { echo $char; return $char; static $map = ['S'=>'[S5]','5'=>'[S5]','1'=>'[1I]','I'=>'[1I]','G'=>'[6G]','6'=>'[6G]']; return array_key_exists($char, $map) ? $map[$char] : $char; }. [ 'a', 'b' ] // str_split($input) )); */ var_dump($regex); echo $regex . PHP_EOL; echo (0 < preg_match("/$regex/", $store) ? 'Match' : 'No match');

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