tryphp_func_array_intersect_key2.php:
<!DOCTYPE html> <html> <body> <?php $a1=array("red","green","blue","yellow"); $a2=array("red","green","blue"); $result=array_intersect_key($a1,$a2); print_r($result); ?> </body> </html>
Array ( [0] => red [1] => green [2] => blue )