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<?php $array1 = array("a" => "green", "b" => "brown", "c" => "blue", "red"); $array2 = array("a" => "green", "b" => "yellow", "blue", "red"); $result_array = array_intersect_assoc($array1, $array2); print_r($result_array); print_r($array1); print_r($array2);
Output for 4.3.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
Array ( [a] => green ) Array ( [a] => green [b] => brown [c] => blue [0] => red ) Array ( [a] => green [b] => yellow [0] => blue [1] => red )