Add missing parameter and return type documentation in StringUtil

diff --git a/wcfsetup/install/files/lib/util/StringUtil.class.php b/wcfsetup/install/files/lib/util/StringUtil.class.php
index 648f2513e84d75d41715451ba6f9ebbd8569601e..b18f1d784db5f05a6942ca20d41a873380ea5a6d 100644 (file)
--- a/wcfsetup/install/files/lib/util/StringUtil.class.php
+++ b/wcfsetup/install/files/lib/util/StringUtil.class.php
@@ -243,6 +243,9 @@ final class StringUtil {
        
        /**
         * Alias to php ucfirst() function with multibyte support.
+        * 
+        * @param       string          $string
+        * @return      string
         */
        public static function firstCharToUpperCase($string) {
                return mb_strtoupper(mb_substr($string, 0, 1)).mb_substr($string, 1);
@@ -250,6 +253,9 @@ final class StringUtil {
        
        /**
         * Alias to php lcfirst() function with multibyte support.
+        * 
+        * @param       string          $string
+        * @return      string
         */
        public static function firstCharToLowerCase($string) {
                return mb_strtolower(mb_substr($string, 0, 1)).mb_substr($string, 1);
@@ -257,6 +263,9 @@ final class StringUtil {
        
        /**
         * Alias to php mb_convert_case() function.
+        * 
+        * @param       string          $string
+        * @return      string
         */
        public static function wordsToUpperCase($string) {
                return mb_convert_case($string, MB_CASE_TITLE);