Question

Is there any function that does the inverse operation of array_diff()?

I mean, if i have:

array(1,2,3)
array(3,4,5)

I would like that function returns array(3), or directly 3.

Note: array_intersect() doesn’t fit me.

Javier

Answer 1

If array_intersect() doesn't fit me is because it returns:

Array
(
    [2] => 3
)

and not:

Array
(
    [0] => 3
)

or
3

Then you could easily transform the array to something workable with array_values():

<?php 
$arr1 = array(1,2,3);
$arr2 = array(3,4,5);

$new = array_values(array_intersect($arr1,$arr2));
$new = $new[0];
print_r($new); //3
?>

Else please explain your situation.