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run code in 150+ php & hhvm versions
Bugs & Features
<?php $d = '91224562ec13207b6e8e18d5b7918f55'; $i = 0; $test = function() use ($i) { return md5($i . '5.5.2.2a1'); }; while ($test() != $d) { $i++; }
Output for 5.3.0 - 7.1.0

Process exited with code 137.
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.2.17
Parse error: syntax error, unexpected T_FUNCTION in /in/PPDN6 on line 4
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.4.1, 5.0.0 - 5.0.5
Parse error: parse error, unexpected T_FUNCTION in /in/PPDN6 on line 4
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/PPDN6 on line 4
Process exited with code 255.