Using array_intersect with multidimesional arrays and different keys

Question

Having this array ($firstArray):

array(3) {
  [0]=>
  array(2) {
    ["Name"]=>
    string(3) "foo"
    ["id"]=>
    string(4) "1064"
  }
  [1]=>
  array(2) {
    ["Name"]=>
    string(3) "boo"
    ["id"]=>
    string(4) "1070"
  }
  [2]=>
  array(2) {
    ["Name"]=>
    string(3) "bar"
    ["id"]=>
    string(4) "1081"
 }

And this one ($secondArray):

array(2) {
  [0]=>
  string(4) "1064"
  [1]=>
  string(4) "1081"
}

How can I use array_intersect on these inner arrays?

I tried array_intersect($firstArray, $secondArray); which is not working.

My desired output would be:

array(2) {
  [0]=>
  array(2) {
    ["Name"]=>
    string(3) "foo"
    ["id"]=>
    string(4) "1064"
  }
  [1]=>
  array(2) {
    ["Name"]=>
    string(3) "bar"
    ["id"]=>
    string(4) "1081"
 }

PS: I'm using PHP 5.2 (I cant update the version as it's not my own machine)

Thanks in advance.

roberto06 · Accepted Answer · 2017-03-14 14:05:40Z

1

You can't use array_intersect on two arrays with different structures. To achieve your goal, you have to loop through your first array and check if the id value is in the second array, as such :

$outputArray = array();

foreach ($firstArray as $value) {
    if (in_array($value['id'], $secondArray))
        $outputArray[] = $value;
}

answered Mar 14, 2017 at 14:05

roberto06

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