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<?php $array_a = array(0,15,25); $array_b = array(0,15,25,32); $array_c = array(0,7,25); var_dump(array_diff($array_a,$array_b)); var_dump(array_diff($array_b,$array_a)); var_dump(array_diff($array_a,$array_c));
Output for 4.3.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
array(0) { } array(1) { [3]=> int(32) } array(1) { [1]=> int(15) }