3v4l.org

run code in 300+ PHP versions simultaneously
<?php function foo() : string { return 'foo'; return; }

Shows result from various feature-branches currently under review from the php developers. Contact me to have additional branches featured.

Output for branch master
Fatal error: A function with return type must return a value in /in/bZqWv on line 5
Process exited with code 255.
Output for branch master_jit
Fatal error: A function with return type must return a value in /in/bZqWv on line 5
Process exited with code 255.
Output for branch enumerations
Fatal error: A function with return type must return a value in /in/bZqWv on line 5
Process exited with code 255.

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