diff --git a/website/queries/checkInput.php b/website/queries/checkInput.php
index 3d17f43..03f7b48 100644
--- a/website/queries/checkInput.php
+++ b/website/queries/checkInput.php
@@ -41,7 +41,11 @@ function checkInputChoice($variable, $option){
     }
 }
 
-/* Checks for only letters and spaces. */
+/**
+ * Checks for only letters and spaces.
+ * @param $variable
+ * @throws lettersAndSpacesException
+ */
 function checkName($variable){
     if (empty($variable)) {
         throw new lettersAndSpacesException("Verplicht!");
@@ -52,7 +56,11 @@ function checkName($variable){
     }
 }
 
-/* Checks for bday */
+/**
+ * Checks for bday
+ * @param $variable
+ * @throws bdayException
+ */
 function validateBday($variable){
     if (empty($variable)) {
         throw new bdayException("Verplicht!");
@@ -220,6 +228,9 @@ function test_input($data) {
     return $data;
 }
 
+/**
+ * Class lettersAndSpacesException
+ */
 class lettersAndSpacesException extends Exception
 {
     public function __construct($message = "", $code = 0, Exception $previous = null)
@@ -228,7 +239,9 @@ class lettersAndSpacesException extends Exception
     }
 }
 
-
+/**
+ * Class bdayException
+ */
 class bdayException extends Exception
 {
     public function __construct($message = "", $code = 0, Exception $previous = null)
@@ -237,6 +250,9 @@ class bdayException extends Exception
     }
 }
 
+/**
+ * Class usernameException
+ */
 class usernameException extends Exception
 {
     public function __construct($message = "", $code = 0, Exception $previous = null)
@@ -245,6 +261,9 @@ class usernameException extends Exception
     }
 }
 
+/**
+ * Class passwordException
+ */
 class passwordException extends Exception
 {
     public function __construct($message = "", $code = 0, Exception $previous = null)
@@ -253,6 +272,9 @@ class passwordException extends Exception
     }
 }
 
+/**
+ * Class confirmPasswordException
+ */
 class confirmPasswordException extends Exception
 {
     public function __construct($message = "", $code = 0, Exception $previous = null)
@@ -261,6 +283,9 @@ class confirmPasswordException extends Exception
     }
 }
 
+/**
+ * Class fbConfirmPasswordException
+ */
 class fbConfirmPasswordException extends Exception
 {
     public function __construct($message = "", $code = 0, Exception $previous = null)
@@ -269,6 +294,9 @@ class fbConfirmPasswordException extends Exception
     }
 }
 
+/**
+ * Class emailException
+ */
 class emailException extends Exception
 {
     public function __construct($message = "", $code = 0, Exception $previous = null)
@@ -277,6 +305,9 @@ class emailException extends Exception
     }
 }
 
+/**
+ * Class confirmEmailException
+ */
 class confirmEmailException extends Exception
 {
     public function __construct($message = "", $code = 0, Exception $previous = null)
@@ -285,6 +316,9 @@ class confirmEmailException extends Exception
     }
 }
 
+/**
+ * Class captchaException
+ */
 class captchaException extends Exception
 {
     public function __construct($message = "", $code = 0, Exception $previous = null)
@@ -293,6 +327,9 @@ class captchaException extends Exception
     }
 }
 
+/**
+ * Class registerException
+ */
 class registerException extends Exception
 {
     public function __construct($message = "", $code = 0, Exception $previous = null)
diff --git a/website/queries/createGroup.php b/website/queries/createGroup.php
index 1b093fb..84843d2 100644
--- a/website/queries/createGroup.php
+++ b/website/queries/createGroup.php
@@ -8,6 +8,7 @@ require_once "../queries/alerts.php";
  */
 function createGroup()
 {
+    // Creates the group.
     $createGroup = prepareQuery("
     INSERT INTO
         `group_page` (`name`, `description`)
@@ -17,6 +18,7 @@ function createGroup()
     $createGroup->bindValue(':description', test_input($_POST["bio"]));
     $createGroup->execute();
 
+    // Gets the groupID just created.
     $getGroupID = prepareQuery("
     SELECT
         `groupID`
@@ -28,6 +30,7 @@ function createGroup()
     $getGroupID->execute();
     $groupID = $getGroupID->fetch()["groupID"];
 
+    // Adds the user as an admin.
     $makeUserAdmin = prepareQuery("
     INSERT INTO
         `group_member` (userID, groupID, role)
diff --git a/website/queries/emailconfirm.php b/website/queries/emailconfirm.php
index 0e6aab1..ff9c672 100644
--- a/website/queries/emailconfirm.php
+++ b/website/queries/emailconfirm.php
@@ -1,5 +1,8 @@
 <?php
-
+/**
+ * Sends a confirm email if you know the username.
+ * @param string $username
+ */
 function sendConfirmEmailUsername(string $username) {
     $stmt = prepareQuery("
     SELECT
@@ -15,6 +18,10 @@ function sendConfirmEmailUsername(string $username) {
     sendConfirmEmail($userID);
 }
 
+/**
+ * Sends a confirm email if you know the userID.
+ * @param int $userID
+ */
 function sendConfirmEmail(int $userID) {
     $stmt = prepareQuery("
     SELECT 
diff --git a/website/queries/login.php b/website/queries/login.php
index 3480991..5ba4c9e 100644
--- a/website/queries/login.php
+++ b/website/queries/login.php
@@ -1,6 +1,9 @@
 <?php
 
-//Find matching password with the inputted username/emailadress.
+/**
+ * Find matching password with the inputted username/emailadress.
+ * @return mixed
+ */
 function getUser() {
     $stmt = prepareQuery("
     SELECT
diff --git a/website/queries/post.php b/website/queries/post.php
index ecc5c48..dc41b49 100644
--- a/website/queries/post.php
+++ b/website/queries/post.php
@@ -281,6 +281,12 @@ function checkPermissionOnPost(int $postID, int $userID) : bool {
     }
 }
 
+/**
+ * Returns role of an user.
+ * @param int $userID
+ * @param int $groupID
+ * @return mixed role of an user.
+ */
 function getRoleInGroup(int $userID, int $groupID) {
     $stmt = prepareQuery("
     SELECT