3v4l.org

run code in 300+ PHP versions simultaneously
<?php function x($x) { for(;;) { for(;;) { for(;;) { for(;;) { for(;;) { for(;;) { break $x; } return false; } return false; } return false; } return false; } return true; } return false; } var_dump(x($x));
Output for 5.4.0 - 5.4.30
Fatal error: 'break' operator with non-constant operand is no longer supported in /in/2VHr8 on line 10
Process exited with code 255.
Output for 5.3.0 - 5.3.29
Notice: Undefined variable: x in /in/2VHr8 on line 25 bool(false)
preferences:
187.16 ms | 1395 KiB | 68 Q