3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php var_dump(preg_match_all("~%(?:(\d+)[$])?[-+]?(?:[ 0]|['].)?(?:[-]?\d+)?(?:[.]\d+)?[%bcdeEufFgGosxX]~", 'The %2$s contains %1$d monkeys', $arguments));
Output for 4.3.0 - 7.2.0
int(2)