3v4l.org

run code in 300+ PHP versions simultaneously
<?php function a () { function b() { echo "I am b.\n"; } echo "I am a.\n"; } if (function_exists("b")) echo "b is defined.\n"; else echo "b is not defined.\n"; a(); if (function_exists("b")) echo "b is defined.\n"; else echo "b is not defined.\n"; b();
Output for git.master, git.master_jit, rfc.property-hooks
b is not defined. I am a. b is defined. I am b.

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:
34.47 ms | 401 KiB | 8 Q