3v4l.org

run code in 300+ PHP versions simultaneously
<?php $foo = null; var_dump($foo === null); var_dump(is_null($foo)); $bar = array('x' => 'x'); var_dump(isset($bar['x'])); var_dump(array_key_exists('x', $bar)); var_dump(isset($baz) ? $baz : null); var_dump($baz);
Output for git.master, git.master_jit, rfc.property-hooks
bool(true) bool(true) bool(true) bool(true) NULL Warning: Undefined variable $baz in /in/07BVM on line 12 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:
130.83 ms | 405 KiB | 5 Q