recursive array_diff()?

by

There is one such function implemented in the comments of array_diff.

function arrayRecursiveDiff($aArray1, $aArray2) {
  $aReturn = array();

  foreach ($aArray1 as $mKey => $mValue) {
    if (array_key_exists($mKey, $aArray2)) {
      if (is_array($mValue)) {
        $aRecursiveDiff = arrayRecursiveDiff($mValue, $aArray2[$mKey]);
        if (count($aRecursiveDiff)) { $aReturn[$mKey] = $aRecursiveDiff; }
      } else {
        if ($mValue != $aArray2[$mKey]) {
          $aReturn[$mKey] = $mValue;
        }
      }
    } else {
      $aReturn[$mKey] = $mValue;
    }
  }
  return $aReturn;
}

The implementation only handles two arrays at a time, but I do not think that really posses a problem. You could run the diff sequentially if you need the diff of 3 or more arrays at a time. Also this method uses key checks and does a loose verification.

More Related Contents:

  1. How to search by key=>value in a multidimensional array in PHP
  2. Recursive function to generate multidimensional array from database result
  3. create array tree from array list
  4. Cartesian Product of N arrays
  5. Search for a key in an array, recursively
  6. PHP hierarchical array – Parents and childs
  7. Deep recursive array of directory structure in PHP
  8. Converting an array from one to multi-dimensional based on parent ID values
  9. PHP Recursively unset array keys if match
  10. Recursively sort keys of a multidimensional array
  11. PHP tree structure for categories and sub categories without looping a query
  12. How can I sum all values of a specific array key recursively?
  13. PHP convert nested array to single array while concatenating keys?
  14. Removing array of arrays for certain inner values in PHP
  15. Can't echo items from array
  16. Passing an Array as Arguments, not an Array, in PHP
  17. PHP append one array to another (not array_push or +)
  18. PHP: Check if an array contains all array values from another array
  19. php implode (101) with quotes
  20. Combinations, Dispositions and Permutations in PHP
  21. PHP Add element to every sub array of multi dimension array
  22. PHP foreach with Nested Array?
  23. Compare multidimensional arrays in PHP
  24. PDO fetchAll array to one dimensional
  25. PHP: Create an array for a range
  26. Interleaving multiple arrays into a single array
  27. Easy way to apply a function to an array
  28. Create PHP array from MySQL column
  29. Recreate original PHP array from print_r output [duplicate]
  30. How to convert an integer to an array in PHP?

Leave a Comment