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run code in 200+ php & hhvm versions
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<?php var_dump((bool)"1"); var_dump((bool)"0"); // When Warning is ignored the type juggling changed var_dump((0/0)+100);
based on FLXJc
Output for 7.0.0 - 7.2.0
bool(true) bool(false) Warning: Division by zero in /in/O6K9s on line 6 float(NAN)
Output for 5.3.18 - 5.6.28
bool(true) bool(false) Warning: Division by zero in /in/O6K9s on line 6 int(100)