PHP 2数组 - 将两个数组中存在的值合并到一个数组中

Question

I have 2 arrays:

$array1 = array(1,2,3,4,5);
$array2 = array(3,4,5,6,7);

Is there any PHP function that does this?

$finalArray = unknown_php_function($array1,$array2);
// result: $finalArray = array(3,4,5);

It merges both arrays and removes values which aren't present in both arrays. Do I have to build a foreach cycle or is there an easier way? Thanks

Answer 1

You want array_intersect for this, basically the intersection of two sets (arrays, in this case), just like in school. :-)

Answer 2

You're looking for array_intersect() . Here is a demo:

$array1 = array(1,2,3,4,5);
$array2 = array(3,4,5,6,7);

$finalArray = array_intersect($array1,$array2);
print_r($finalArray);

Outputs:

Array
(
    [2] => 3
    [3] => 4
    [4] => 5
)