3v4l.org

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

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:
48.03 ms | 401 KiB | 8 Q