3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $string1 = "sqrtpdrt"; $string2 = "qwntfschrprtkjs"; $regex = '/^(?=.*[bcdfghjklmnpqrstvwxz]{4})(?!.*chr)/i'; var_dump( preg_match($regex, $string1), preg_match($regex, $string2) );
Output for 4.3.0 - 7.1.0
int(1) int(0)