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run code in 200+ php & hhvm versions
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<?php $levels = ['0', '1', '2', '3']; var_dump(in_array('0.3', $levels));
based on uJV33
Output for 5.6.0 - 5.6.30, hhvm-3.15.4, 7.0.0 - 7.3.0alpha1
bool(false)