Syntax:array array_intersect_key ( array $array1 , array $array2 [, array $ … ] ) Description:Computes the intersection of arrays using keys for comparison <?php $array1 = array('blue' => 1, 'red' => 2, 'green' => 3, 'purple' => 4); $array2 = array('green' => 5, 'blue' => 6, 'yellow' => 7, 'cyan' => 8); print_r(array_intersect_key($array1, $array2)); ?> OUTPUT Array ( [blue] => 1 [green] => 3 )... Read More »