Differentiate between no description or an empty description

[friendica.git] / src / Util / Arrays.php

diff --git a/src/Util/Arrays.php b/src/Util/Arrays.php
index 1103580139c0bc45bf9a5618c8694b50e15c0a00..1d96be05125ead41e8bb7f0d28570f4bc74d9a3b 100644 (file)
--- a/src/Util/Arrays.php
+++ b/src/Util/Arrays.php
@@ -1,6 +1,6 @@
 <?php
 /**
- * @copyright Copyright (C) 2020, Friendica
+ * @copyright Copyright (C) 2010-2023, the Friendica project
  *
  * @license GNU AGPL version 3 or any later version
  *
@@ -29,8 +29,8 @@ class Arrays
        /**
         * Private constructor
         */
-       private function __construct () {
-               // Utitlities don't have instances
+       private function __construct() {
+               // Utilities don't have instances
        }
 
        /**
@@ -40,7 +40,7 @@ class Arrays
         * @param string $glue  Glue for imploded elements
         * @return string String with elements from array
         */
-       public static function recursiveImplode (array $array, $glue) {
+       public static function recursiveImplode(array $array, $glue) {
                // Init returned string
                $string = '';
 
@@ -62,4 +62,32 @@ class Arrays
                // Return it
                return $string;
        }
+
+       /**
+        * walks recursively through an array with the possibility to change value and key
+        *
+        * @param array    $array    The array to walk through
+        * @param callable $callback The callback function
+        *
+        * @return array the transformed array
+        */
+       public static function walkRecursive(array &$array, callable $callback)
+       {
+               $new_array = [];
+
+               foreach ($array as $k => $v) {
+                       if (is_array($v)) {
+                               if ($callback($v, $k)) {
+                                       $new_array[$k] = self::walkRecursive($v, $callback);
+                               }
+                       } else {
+                               if ($callback($v, $k)) {
+                                       $new_array[$k] = $v;
+                               }
+                       }
+               }
+               $array = $new_array;
+
+               return $array;
+       }
 }