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run code in 150+ php & hhvm versions
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<?php $str = 'd527592b83555a6a50692b384c9f1906a3b56b49'; var_dump(bin2hex(pack('H*',$str)));
Output for 4.3.0 - 7.1.0
string(40) "d527592b83555a6a50692b384c9f1906a3b56b49"