Merge pull request #7194 from ping-yee/docs-replace-mixed-in-others-cahce-class

docs: replace type mixed in the remaining cache class.

Author: samsonasik

system/Cache/Handlers/FileHandler.php

@@ -229,7 +229,7 @@ public function isSupported(): bool
      * Does the heavy lifting of actually retrieving the file and
      * verifying it's age.
      *
-     * @return mixed
+     * @return array|bool|float|int|object|string|null
      */
     protected function getItem(string $filename)
     {
@@ -366,8 +366,8 @@ protected function getDirFileInfo(string $sourceDir, bool $topLevelOnly = true,
      * Options are: name, server_path, size, date, readable, writable, executable, fileperms
      * Returns FALSE if the file cannot be found.
      *
-     * @param string $file           Path to file
-     * @param mixed  $returnedValues Array or comma separated string of information returned
+     * @param string       $file           Path to file
+     * @param array|string $returnedValues Array or comma separated string of information returned
      *
      * @return array|false
      */