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run code in 150+ php & hhvm versions
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<?php $a = (1 << 0); $b = (1 << $a); $c = (1 << $b); echo ($c || $b) << 2 * $a | $a; //5
Output for 4.3.0 - 4.4.1, 4.4.3 - 5.0.5, 5.1.1, 5.1.3 - 5.1.4, 5.1.6 - 7.1.0
5
Output for 4.4.2, 5.1.2, 5.1.5
//55
Output for 5.1.0
Fatal error: fatal flex scanner internal error--end of buffer missed in /in/FPbs2 on line 7
Process exited with code 255.