3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php var_dump(preg_match("/(?P<foo>\\d{0,99})/si", 'foo bar 42 lol', $m), $m);
based on 3erRi
Output for 4.3.3 - 5.6.28, hhvm-3.12.0, 7.0.0 - 7.1.0
int(1) array(3) { [0]=> string(0) "" ["foo"]=> string(0) "" [1]=> string(0) "" }
Output for hhvm-3.10.0

Process exited with code 153.
Output for 4.3.0 - 4.3.2
int(1) array(2) { [0]=> string(0) "" [1]=> string(0) "" }