diff --git a/website/public/login.php b/website/public/login.php
index d8eb62a..c78b3ca 100644
--- a/website/public/login.php
+++ b/website/public/login.php
@@ -4,6 +4,7 @@
     include("../views/login_head.php");
     require_once("../queries/connect.php");
     include_once("../queries/login.php");
+    include_once("../queries/checkInput.php")
 ?>
 <body>
 <?php
diff --git a/website/public/register.php b/website/public/register.php
index 66d1454..9d9f884 100644
--- a/website/public/register.php
+++ b/website/public/register.php
@@ -29,7 +29,7 @@
         }
 
         checkInputChoice("username", "username");
-        checkInputChoice("password", "longerEigth");
+        checkInputChoice("password", "longerEight");
         checkInputChoice("confirmpassword", "");
         matchPassword();
         checkInputChoice("location", "lettersAndSpace");
diff --git a/website/queries/checkInput.php b/website/queries/checkInput.php
index d48e4e0..25e5149 100644
--- a/website/queries/checkInput.php
+++ b/website/queries/checkInput.php
@@ -1,4 +1,10 @@
 <?php
+/**
+ * Function for checking inputfields
+ * @param variable $variable Give name of the inputfield.
+ * @param string $option Give the name of the option.
+ * @return sets correct to false and gives value to error message if it doesn't pass the checks.
+ */
 function checkInputChoice($variable, $option){
     if (empty($_POST[$variable])) {
         $GLOBALS[$variable . "Err"] = "Verplicht!";
@@ -15,28 +21,28 @@ function checkInputChoice($variable, $option){
             username($variable);
             break;
 
-          case "longerEigth";
+          case "longerEight";
             longerEigth($variable);
             break;
 
           case "email";
             validateEmail($variable);
             break;
-            
+
           default:
             break;
-
         }
     }
 }
 
+/* Checks for only letters and spaces. */
 function checkOnly($variable){
     if (!preg_match("/^[a-zA-Z ]*$/",$GLOBALS[$variable])) {
         $GLOBALS[$variable . "Err"] = "Alleen letters en spaties zijn toegestaan!";
         $correct = false;
     }
 }
-
+/* checks if username exist and if its longer than 6 characters. */
 function username($variable){
     if (strlen($GLOBALS[$variable]) < 6) {
         $GLOBALS[$variable . "Err"] = "Gebruikersnaam moet minstens 6 karakters bevatten";
@@ -47,13 +53,15 @@ function username($variable){
     }
 }
 
-function longerEigth($variable){
+/* checks if an input is longer that 8 characters. */
+function longerEight($variable){
     if (strlen($GLOBALS[$variable]) < 8) {
         $GLOBALS[$variable . "Err"] = "Moet minstens 8 karakters bevatten";
         $correct = false;
     }
 }
 
+/* checks if an input is a valid email. */
 function validateEmail($variable){
     if (!filter_var($GLOBALS[$variable], FILTER_VALIDATE_EMAIL)) {
         $GLOBALS[$variable . "Err"] = "Geldige email invullen!";
@@ -66,6 +74,7 @@ function validateEmail($variable){
     }
 }
 
+/* checks if two passwords matches. */
 function matchPassword(){
     if ($_POST["password"] != $_POST["confirmpassword"]) {
         $GLOBALS["confirmpasswordErr"] = "Wachtwoorden matchen niet";
@@ -86,6 +95,7 @@ function registerCheck(){
     }
 }
 
+/* removes weird characters of an input. */
 function test_input($data) {
     $data = trim($data);
     $data = stripslashes($data);
