Synatx of array_uintersect in php
array array_uintersect(array array1, array array2
[, … array arrayN], string function)
Returns an array containing all the values in array1 that are present in all of the other arrays. Only the values are used to check for equality; that is, “a” => 1 and “b” => 1 are considered equal. The function function is used to compare the values of the elements for equality. The function is called with two parameters—the values to compare. It should return an integer less than 0 if the first argument is less than the second, 0 if the first and second arguments are equal, and an integer greater than 0 if the first argument is greater than the second. The keys of the values are preserved
Example
<?php
$array1 = array("a" => "green", "b" => "brown", "c" => "blue", "red");
$array2 = array("a" => "GREEN", "B" => "brown", "yellow", "red");
print_r(array_uintersect($array1, $array2, "strcasecmp"));
?>
Array
(
[a] => green
[b] => brown
[0] => red
)