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run code in 150+ php & hhvm versions
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<?php $n = unpack('nC', md5('className'.'2026', true)); var_dump($n);
Output for 5.0.0 - 7.1.0
array(1) { ["C"]=> int(15918) }
Output for 4.3.2 - 4.4.9
Warning: Wrong parameter count for md5() in /in/roYPC on line 2 Warning: unpack(): Type n: not enough input, need 2, have 0 in /in/roYPC on line 2 bool(false)
Output for 4.3.1
Warning: Wrong parameter count for md5() in /in/roYPC on line 2 Warning: unpack() [http://www.php.net/function.unpack]: Type n: not enough input, need 2, have 0 in /in/roYPC on line 2 bool(false)
Output for 4.3.0
Warning: Wrong parameter count for md5() in /in/eH2K0 on line 2 Warning: unpack() [http://www.php.net/function.unpack]: Type n: not enough input, need 2, have 0 in /in/eH2K0 on line 2 bool(false)