3v4l.org

run code in 300+ PHP versions simultaneously
<?php function f() { return array( 'a' => 'b' ); } var_dump(isset(f()));
Output for 5.3.0 - 5.3.28, 5.4.0 - 5.4.24
Fatal error: Can't use function return value in write context in /in/eiLvr on line 10
Process exited with code 255.
preferences:
184.33 ms | 1395 KiB | 61 Q