3v4l.org

run code in 300+ PHP versions simultaneously
<?php $index[]; echo empty($index);
Output for 5.3.0 - 5.3.28, 5.4.0 - 5.4.30
Fatal error: Cannot use [] for reading in /in/mreZ2 on line 2
Process exited with code 255.

preferences:
197.11 ms | 1395 KiB | 67 Q