Question

I would like to find out a duplicate value in the all nested arrays within an array.
At the moment my array is something like that.

Array $bigarray = Array (
    [431] => Array (
        [0] => orange 
        [1] => apple 
        [2] => pine
    ) 
    [440] => Array ( 
        [0] => orange 
        [1] => lilly 
    ) 
    [444] => Array (  
        [0] => orange 
        [1] => pine 
    ) 
)

I would like to extract only orange which is in all

arrays('431','440','444').

Woudl you give me some idea…?
Thanks in advance.

Answer 1

You can use array_intersect():

$intersected = null;
foreach ($bigarray as $arr) {
  $intersected = $intersected ? array_intersect($arr, $intersected) : $arr;
  if (!$intersected) {
    break; // no reason to continue
  }
}
print_r($intersected);

Array
(
  [0] => orange
)