Update: modified return bool value on comment
diff --git a/system/core/Input.php b/system/core/Input.php
index 2b36ea3..1e37b11 100755
--- a/system/core/Input.php
+++ b/system/core/Input.php
@@ -369,7 +369,7 @@
 	*
 	* @access	public
 	* @param	string
-	* @return	string
+	* @return	bool
 	*/
 	public function valid_ip($ip)
 	{