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run code in 150+ php & hhvm versions
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<?php var_dump("php" == true); // bool(true) var_dump(0 == true); // bool(false) var_dump("php" == 0); // bool(true) ??????
based on jjLDV
Output for 4.3.0 - 5.0.5, 5.1.1 - 5.6.28, hhvm-3.12.0, 7.0.0 - 7.1.0
bool(true) bool(false) bool(true)
Output for hhvm-3.10.0

Process exited with code 153.
Output for 5.1.0
Fatal error: fatal flex scanner internal error--end of buffer missed in /in/nnlQ8 on line 5
Process exited with code 255.