commented backgroundupdate.php

backgroundupdate.php

@@ -1,12 +1,12 @@
 <?php
-session_start();
+session_start(); //first we need a session to store the data into
 
-include 'db.inc.php';
-$username = $_SESSION['username'];
+include 'db.inc.php'; //and a db connection
+$username = $_SESSION['username']; //then we get the username from the session
 
-$statement = $pdo->prepare("SELECT * FROM users WHERE username = :username");
+$statement = $pdo->prepare("SELECT * FROM users WHERE username = :username"); //building a statement & getting the whole line of username = $username
 $result = $statement->execute(array('username' => $username));
-$user = $statement->fetch();
+$user = $statement->fetch(); //putting the stuff in an array and afterwards store it in the session:
 $_SESSION['userid'] = $user['id'];
 $_SESSION['email'] = $user['email'];
 $_SESSION['username'] = $user['username'];