Get intersection of a multiple array in PHP

Question

Starting Point

I have a multiple array, like the follow example.

$array = array (
  \'role_1\' => 
  array (
    0 => \'value_2\',
    1 =>         


        

Answer 1

array_intersect work for this:

$data = array (
  'role_1' => 
  array (
    0 => 'value_2',
    1 => 'value_3',
  ),
  'role_2' => 
  array (
    0 => 'value_1',
    1 => 'value_2',
  ),
  'role_3' => 
  array (
    0 => 'value_2',
    1 => 'value_3',
  )
);


$result = array_intersect($data['role_1'], $data['role_2'], $data['role_3']);
print_r($result);

result :

Array ( [0] => value_2 )