- array_intersect: documentation ( source)
- print_r: documentation ( source)
<?php
$array1 = array("a" => array(1));
$array2 = array("b" => array("1"));
$a = array(1, 2, 3, 4);
$b = array(2, 4, 5, 6);
$result1 = array_intersect($a, $b); // 2 4
$result2 = array_intersect($a, $b); // 2 4
print_r($result1);
print_r($result2);
?>