$re = '/^([\s\S]+?)(?=\))./m';
$str = 'Цена за шт. ((8189 руб./м2) Цена патина/софттач : 193 руб./шт. (9684 руб./м2) Цена глянец: 215 руб./шт. (10790 руб./м2)) ';
preg_match_all($re, $str, $matches, PREG_SET_ORDER, 0);
// Print the entire match result
var_dump($matches);
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for PHP, please visit: http://php.net/manual/en/ref.pcre.php