Beginner PHP Tutorial -135-> 140 - Logging the User Out

loginform.inc.php

<?php if (isset ($_POST['username']) && isset ($_POST['password'])) { $username = $_POST['username']; $password = $_POST['password']; $password_hash = md5($password); if (!empty($username) && !empty($password)) { $query = "SELECT `id` FROM `users` WHERE `username` ='$username' AND `password`= '$password_hash' "; if ($query_run = mysql_query($query)) { $query_num_rows = mysql_num_rows($query_run); if ($query_num_rows == 0) { echo 'Invalid username/password. try again'; } else if ($query_num_rows == 1) { echo $user_id = mysql_result($query_run,0,'id'); $_SESSION['user_id'] = $user_id; header('Location: index.php'); } } } else { echo 'You must supply a username and password.'; } } ?> <form action "<?php echo $current_file; ?>" method = "POST"> Username: <input type ="text" name = "username"> Password: <input type ="password" name ="password"> <input type = "submit" value = "Log in"> </form>

core.inc.php

<?php ob_start(); session_start(); $current_file = $_SERVER['SCRIPT_NAME']; $http_referer = $_SERVER['HTTP_REFERER']; function loggedin () { if (isset ($_SESSION['user_id']) &&!empty($_SESSION['user_id'])) { return true; } else { return false; } } ?>

index.php

<?php require 'core.inc.php'; require 'connect.inc.php' ; if (loggedin()) { echo 'You are logged in. <a href = "logout.php">Log out</a>'; } else { include 'loginform.inc.php'; } ?>

logout.php

<?php require 'core.inc.php'; session_destroy(); header('Location: ' .$http_referer); ?>

connec.inc.php

<?php $conn_error = 'could not connect. '; $mysql_host = 'localhost'; $mysql_user = 'root'; $mysql_pass =''; $mysql_db = 'a_database'; if (!@mysql_connect($mysql_host, $mysql_user, $mysql_pass) || !@mysql_select_db($mysql_db)) { die($conn_error); } ?>

Beginner PHP Tutorial -135-> 140 - Logging the User Out 2015-10-02T10:04:00+07:00 Rating: 4.5 Diposkan Oleh: http://pdunoteit.blogspot.com/