3v4l.org

run code in 300+ PHP versions simultaneously
<?php function f(&$i = null){ var_dump($i) } f()
Output for 5.3.0 - 5.3.27, 5.4.0 - 5.4.22
Parse error: syntax error, unexpected '}' in /in/Fgduh on line 5
Process exited with code 255.
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182.01 ms | 1395 KiB | 58 Q