3v4l.org

run code in 300+ PHP versions simultaneously
<?php class X { private $foo = array('foo' => NULL); return $tmp; function __construct() { echo key($this->foo); } } new X;
Output for 5.4.0 - 5.4.28
Parse error: syntax error, unexpected 'return' (T_RETURN), expecting function (T_FUNCTION) in /in/MnNmm on line 4
Process exited with code 255.
Output for 5.3.0 - 5.3.28
Parse error: syntax error, unexpected T_RETURN, expecting T_FUNCTION in /in/MnNmm on line 4
Process exited with code 255.
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178.6 ms | 1395 KiB | 65 Q