diff --git a/res/php/sendmail.php b/res/php/sendmail.php
index af9782a..33abdce 100755
--- a/res/php/sendmail.php
+++ b/res/php/sendmail.php
@@ -2,12 +2,22 @@
 # COPYRIGHT (c) 2016 Marcel Kapfer (mmk2410)
 # MIT License
 
+/**
+ * configuration map
+ */
 $ini = parse_ini_file("../../filespread.ini");
 
 date_default_timezone_set($ini["timezone"]);
 
 require '../../vendor/autoload.php';
 
+/**
+ * main function that is executed at the beginning.
+ *
+ * @author Marcel Kapfer <marcelmichaelkapfer@gmail.com>
+ * 
+ * @param $ini an configuration map.
+ */
 function main($ini) {
 
     $data = json_decode($_GET["data"], true);
@@ -38,6 +48,16 @@ function main($ini) {
 
 }
 
+/**
+ * function for sending the mail.
+ *
+ * @author Marcel Kapfer <marcelmichaelkapfer@gmail.com>
+ * 
+ * @param $title the subject of the mail.
+ * @param $content the text of the mail.
+ * @param $address the receiver of the mail.
+ * @param $ini an configuration map.
+ */
 function sendMail($title, $content, $filename, $address, $ini) {
 
     $mail = new PHPMailer;