Newscoop\NewscoopBundle\DependencyInjection\NewscoopNewscoopExtension::array_merge_recursive_distinct PHP Method

array_merge_recursive_distinct() private method

array_merge_recursive(array('key' => 'org value'), array('key' => 'new value')); => array('key' => array('org value', 'new value')); array_merge_recursive_distinct does not change the datatypes of the values in the arrays. Matching keys' values in the second array overwrite those in the first array, as is the case with array_merge, i.e.: array_merge_recursive_distinct(array('key' => 'org value'), array('key' => 'new value')); => array('key' => 'new value'); Parameters are passed by reference, though only for performance reasons. They're not altered by this function.
private array_merge_recursive_distinct ( array &$array1, mixed &$array2 = null ) : array
$array1 array
$array2 mixed
return array
    private function &array_merge_recursive_distinct(array &$array1, &$array2 = null)
    {
        $merged = $array1;
        if (is_array($array2)) {
            foreach ($array2 as $key => $val) {
                if (is_array($array2[$key])) {
                    $mergedKey = !empty($merged[$key]) ? $merged[$key] : null;
                    $arrayKey = $array2[$key];
                    $merged[$key] = is_array($mergedKey) ? $this->array_merge_recursive_distinct($mergedKey, $arrayKey) : $arrayKey;
                } else {
                    $merged[$key] = $val;
                }
            }
        }
        return $merged;
    }