3v4l.org

run code in 300+ PHP versions simultaneously
<?php $x = ['a'=>333, 'b'=>222];
Output for 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.7 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.12 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
Output for 5.3.28 - 5.3.29
Parse error: syntax error, unexpected '[' in /in/TgTI1 on line 2
Process exited with code 255.
Output for 5.3.0 - 5.3.27
Parse error: syntax error, unexpected '[' in /in/uCNEQ on line 2
Process exited with code 255.

preferences:
204.04 ms | 401 KiB | 257 Q