3v4l.org

run code in 300+ PHP versions simultaneously
<?php $str = "唧"; echo $str; preg_match("/[^\w]/", $str, $match); preg_match("/[\x{ffffffff}]+/u", $str, $mt); print_r($mt); print_r($match);

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41.98 ms | 402 KiB | 5 Q