3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a = array("" => "ddd", null => "ddddd"); echo a[null]
Output for 5.3.0 - 5.3.28, 5.4.0 - 5.4.29
Parse error: syntax error, unexpected '[', expecting ',' or ';' in /in/RLf3N on line 5
Process exited with code 255.
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186.64 ms | 1399 KiB | 66 Q