3v4l.org

run code in 300+ PHP versions simultaneously
<?php define('A', 1); define('B', 1); if(defined('A')) { function a() { echo "hello from `".__FUNCTION__."`\n"; } } if(defined('B')) { function b() { echo "hello from `".__FUNCTION__."`\n"; } } echo function_exists("b") ? "b is defined\n" : "b is not defined\n"; a(); echo function_exists("b") ? "b is defined\n" : "b is not defined\n"; b(); a(); echo function_exists("b") ? "b is defined\n" : "b is not defined\n";
Output for git.master, git.master_jit, rfc.property-hooks
b is defined hello from `a` b is defined hello from `b` hello from `a` b is defined

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:
50.78 ms | 401 KiB | 8 Q