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<?php $arr1 = ['foo', 'bar', 'baz', 'foo']; $arr2 = ['foo', 'bar', 'baz', 'bar']; $intersect = array_intersect($arr1, $arr2); var_dump(count($intersect) === count($arr1) && count($arr1) === count($arr2)); var_dump($intersect);

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