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 f4f53245dad63acbb91e046baf7619ff188d1f53..1d96be05125ead41e8bb7f0d28570f4bc74d9a3b 100644 (file)
--- a/src/Util/Arrays.php
+++ b/src/Util/Arrays.php
@@ -1,8 +1,24 @@
 <?php
 /**
- * @file src/Util/Arrays.php
- * @author Roland Haeder<https://f.haeder.net/profile/roland>
+ * @copyright Copyright (C) 2010-2023, the Friendica project
+ *
+ * @license GNU AGPL version 3 or any later version
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ *
  */
+
 namespace Friendica\Util;
 
 /**
@@ -13,18 +29,18 @@ class Arrays
        /**
         * Private constructor
         */
-       private function __construct () {
-               // Utitlities don't have instances
+       private function __construct() {
+               // Utilities don't have instances
        }
 
        /**
-        * @briefs Implodes recursively a multi-dimensional array where a normal implode() will fail.
+        * Implodes recursively a multi-dimensional array where a normal implode() will fail.
         *
         * @param array  $array Array to implode
         * @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 = '';
 
@@ -46,4 +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;
+       }
 }