3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a = array(& strtolower('a'));
Output for 5.4.20
Fatal error: Can't use function return value in write context in /in/94uRr on line 3
Process exited with code 255.
Output for 5.3.0 - 5.3.27, 5.4.0 - 5.4.19
Fatal error: Can't use function return value in write context in /in/KMM3X on line 3
Process exited with code 255.
preferences:
163.42 ms | 1395 KiB | 56 Q