array_intersect_assoc

Syntax:array array_intersect_assoc ( array $array1 , array $array2 [, array $ ... ] )
Description:Computes the intersection of arrays with additional index check

    <?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);
?>
    

Array ( 
[a] => green 
)