diff --git a/lib/filter/filter.class.php b/lib/filter/filter.class.php
index 91c02c848a..fb2e8572f8 100755
--- a/lib/filter/filter.class.php
+++ b/lib/filter/filter.class.php
@@ -176,7 +176,7 @@ class validater
     }
 
     /**
-     * Empty checking.
+     * Not empty checking.
      * 
      * @param  mixed $var 
      * @static
@@ -188,6 +188,19 @@ class validater
         return !empty($var);
     }
 
+    /**
+     * Empty checking.
+     * 
+     * @param  mixed $var 
+     * @static
+     * @access public
+     * @return bool
+     */
+    public static function checkEmpty($var)
+    {
+        return empty($var);
+    }
+
     /**
      * Account checking.
      *