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<?php $a = array(); $b = array('a' => false,'b' => true, 'c' => false); var_dump(array_intersect($a, $b)) ?>
Output for 4.3.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
array(0) { }