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run code in 150+ php & hhvm versions
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<?php var_dump(0 === '0'); var_dump(in_array(0, array( 'foo', 'bar'), true )); var_dump(in_array('0', array( 'foo', 'bar' ), true));
based on noHXY
Output for 4.3.0 - 5.6.28, hhvm-3.12.0, 7.0.0 - 7.1.0
bool(false) bool(false) bool(false)
Output for hhvm-3.10.0

Process exited with code 153.