3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $string1 = "sqrtpdrt"; // matched $string2 = "qwntfschrprtkjs"; // not matched (contains chr group) $regex = '/^(?=.*[bcdfghjklmnpqrstvwxz]{4})(?!.*chr)/i'; var_dump(preg_match($regex, $string1)); var_dump(preg_match($regex, $string2));
Output for 4.3.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
int(1) int(0)