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<?php $a = [1,2,2,3,3,3,4,4,4,4]; $b = [2,3,5]; var_dump( array_intersect($a, $b), // [2,2,3,3,3] array_intersect($b, $a) // [2,3] );
Output for git.master, git.master_jit, rfc.property-hooks
array(5) { [1]=> int(2) [2]=> int(2) [3]=> int(3) [4]=> int(3) [5]=> int(3) } array(2) { [0]=> int(2) [1]=> int(3) }

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