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run code in 150+ php & hhvm versions
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<?php var_dump(strtotime("February")); echo date('F',strtotime("February"));
Output for 5.2.0 - 7.1.0
int(1424646000) February
Output for 5.1.0 - 5.1.6
bool(false) January
Output for 4.3.0 - 5.0.5
int(-1) January