[ci skip] Merge pull request #5143 from TysonAndre/misc-phpdoc-nits

Fix misc inconsistencies between code and doc comments
diff --git a/system/core/compat/mbstring.php b/system/core/compat/mbstring.php
index f466e1c..1b2f2c6 100644
--- a/system/core/compat/mbstring.php
+++ b/system/core/compat/mbstring.php
@@ -68,7 +68,7 @@
 	 * @link	http://php.net/mb_strlen
 	 * @param	string	$str
 	 * @param	string	$encoding
-	 * @return	string
+	 * @return	int
 	 */
 	function mb_strlen($str, $encoding = NULL)
 	{