3v4l.org

run code in 300+ PHP versions simultaneously
<?php $text = '*/10 * * * *'; if(preg_match('/[^0-9\*\/]/', $text )) echo 'preg_match GOOD! <br/>'; else echo "preg_match BAD!<br/>";

preferences:
55.36 ms | 402 KiB | 5 Q