moved sortArrayByKey logic into Utils::

system/src/Grav/Common/Twig/TwigExtension.php

@@ -371,25 +371,14 @@ class TwigExtension extends \Twig_Extension implements \Twig_Extension_GlobalsIn
      *
      * @param  array    $input
      * @param  string   $filter
-     * @param array|int $direction
+     * @param  int      $direction
+     * @param  int      $sort_flags
      *
      * @return array
      */
-    public function sortByKeyFilter($input, $filter, $direction = SORT_ASC)
+    public function sortByKeyFilter($input, $filter, $direction = SORT_ASC, $sort_flags = SORT_REGULAR)
     {
-        $output = [];
-
-        if (!is_array($input) || !$input) {
-            return $output;
-        }
-
-        foreach ($input as $key => $row) {
-            $output[$key] = $row[$filter];
-        }
-
-        array_multisort($output, $direction, $input);
-
-        return $input;
+        return Utils::sortArrayByKey($input, $filter, $direction, $sort_flags);
     }
 
     /**

system/src/Grav/Common/Utils.php

@@ -966,6 +966,32 @@ abstract class Utils
         return $ordered + $array;
     }
 
+    /**
+     * Sort an array by a key value in the array
+     *
+     * @param $array
+     * @param $array_key
+     * @param int $direction
+     * @param int $sort_flags
+     * @return array
+     */
+    public static function sortArrayByKey($array, $array_key, $direction = SORT_DESC, $sort_flags = SORT_REGULAR )
+    {
+        $output = [];
+
+        if (!is_array($array) || !$array) {
+            return $output;
+        }
+
+        foreach ($array as $key => $row) {
+            $output[$key] = $row[$array_key];
+        }
+
+        array_multisort($output, $direction, $sort_flags, $array);
+
+        return $array;
+    }
+
     /**
      * Get's path based on a token
      *