3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php preg_match(<<<EOD %(?x)<((?i)password(?-i))>\s*+(?P<password>.*?)\s*</\1>% EOD , '<Password> toto </Password>', $match); var_dump($match);
based on Hqr51
Output for 4.3.0 - 7.2.0
array(0) { }