X-Git-Url: https://git.mxchange.org/?a=blobdiff_plain;f=src%2FUtil%2FArrays.php;h=1d96be05125ead41e8bb7f0d28570f4bc74d9a3b;hb=2b3c1972db987ee2396e528476739f4cec4e8972;hp=f4f53245dad63acbb91e046baf7619ff188d1f53;hpb=0a4119adaf6294bf43d135a0f435c1dd677c50e0;p=friendica.git

diff --git a/src/Util/Arrays.php b/src/Util/Arrays.php
index f4f53245da..1d96be0512 100644
--- 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;
+	}
 }