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run code in 150+ php & hhvm versions
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<?php var_dump(md5('QNKCDZO')); echo md5('QNKCDZO'); echo (md5('QNKCDZO') . "1");
Output for 4.3.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
string(32) "0e830400451993494058024219903391" 0e8304004519934940580242199033910e8304004519934940580242199033911