3v4l.org

run code in 300+ PHP versions simultaneously
<?php $foo ||= "default";
Output for 5.3.0 - 5.3.27, 5.4.0 - 5.4.22
Parse error: syntax error, unexpected '=' in /in/UgaEc on line 3
Process exited with code 255.

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178.1 ms | 1395 KiB | 58 Q