3v4l.org

run code in 300+ PHP versions simultaneously
<?php function foo(){} function foo(){}
Output for 5.3.0 - 5.3.28, 5.4.0 - 5.4.29
Fatal error: Cannot redeclare foo() (previously declared in /in/8O4BV:3) in /in/8O4BV on line 4
Process exited with code 255.
preferences:
176.5 ms | 1399 KiB | 66 Q