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<?php | |
/** | |
* @file | |
* Contains \Drupal\Component\Utility\DiffArray. | |
*/ | |
namespace Drupal\Component\Utility; | |
/** | |
* Provides helpers to perform diffs on multi dimensional arrays. | |
* | |
* @ingroup utility | |
*/ | |
class DiffArray { | |
/** | |
* Recursively computes the difference of arrays with additional index check. | |
* | |
* This is a version of array_diff_assoc() that supports multidimensional | |
* arrays. | |
* | |
* @param array $array1 | |
* The array to compare from. | |
* @param array $array2 | |
* The array to compare to. | |
* | |
* @return array | |
* Returns an array containing all the values from array1 that are not present | |
* in array2. | |
*/ | |
public static function diffAssocRecursive(array $array1, array $array2) { | |
$difference = array(); | |
foreach ($array1 as $key => $value) { | |
if (is_array($value)) { | |
if (!array_key_exists($key, $array2) || !is_array($array2[$key])) { | |
$difference[$key] = $value; | |
} | |
else { | |
$new_diff = static::diffAssocRecursive($value, $array2[$key]); | |
if (!empty($new_diff)) { | |
$difference[$key] = $new_diff; | |
} | |
} | |
} | |
elseif (!array_key_exists($key, $array2) || $array2[$key] !== $value) { | |
$difference[$key] = $value; | |
} | |
} | |
return $difference; | |
} | |
} |