3v4l.org

run code in 300+ PHP versions simultaneously
<?php echo "Normal match:\n"; preg_match('/two/', 'two', $match, PREG_UNMATCHED_AS_NULL); var_dump($match); echo "Unmatched $1 is always reported as null:\n"; preg_match('/(one)?two/', 'two', $match, PREG_UNMATCHED_AS_NULL); var_dump($match); preg_match('/two(three)?/', 'two', $match, PREG_UNMATCHED_AS_NULL); var_dump($match); preg_match('/(one)?(two)/', 'two', $match, PREG_UNMATCHED_AS_NULL); var_dump($match); echo "Unmatched $2 is also reported as null:\n"; preg_match('/(two)(three)?/', 'two', $match, PREG_UNMATCHED_AS_NULL); var_dump($match);
Output for git.master, git.master_jit, rfc.property-hooks
Normal match: array(1) { [0]=> string(3) "two" } Unmatched $1 is always reported as null: array(2) { [0]=> string(3) "two" [1]=> NULL } array(2) { [0]=> string(3) "two" [1]=> NULL } array(3) { [0]=> string(3) "two" [1]=> NULL [2]=> string(3) "two" } Unmatched $2 is also reported as null: array(3) { [0]=> string(3) "two" [1]=> string(3) "two" [2]=> NULL }

This tab shows result from various feature-branches currently under review by the php developers. Contact me to have additional branches featured.

Active branches

Archived branches

Once feature-branches are merged or declined, they are no longer available. Their functionality (when merged) can be viewed from the main output page

preferences:
67.12 ms | 402 KiB | 8 Q