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run code in 150+ php & hhvm versions
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<?php $salt = "011396d5dcf8be6817755af34b94bd25"; $pass = "123456"; for($i = 5147;$i--;$pass=md5($pass.$salt)); echo $pass;
Output for 4.3.0 - 5.6.28, hhvm-3.12.0, 7.0.0 - 7.1.0
aab78f5bb9eb7aca9ea2602d561a9ee6
Output for hhvm-3.10.0

Process exited with code 153.