3v4l.org

run code in 300+ PHP versions simultaneously
<?php echo print_r($_SESSION[]);
Output for 5.3.0 - 5.3.27, 5.4.0 - 5.4.19
Fatal error: Cannot use [] for reading in /in/U56st on line 2
Process exited with code 255.
preferences:
180.05 ms | 1395 KiB | 55 Q