3v4l.org

run code in 500+ PHP versions simultaneously
<?php $text = 'class=&quot;s--e'; preg_match('~(class=&quot;(?:[^&]*\s)?)--e~sU', $text, $match); var_dump($match);
Output for 7.4.0 - 7.4.33, 8.0.1 - 8.0.30, 8.1.0 - 8.1.34, 8.2.0 - 8.2.31, 8.3.0 - 8.3.31, 8.4.1 - 8.4.22, 8.5.0 - 8.5.7
array(0) { }
preferences:
96.51 ms | 1259 KiB | 4 Q