Began to refresh knowledge of php. Looking at the video tutorials on http://www.youtube.com/playlist?list=PLYZm5HGThGRBZ3ym2Ek0h4jQvYAxuPLBe I learned that using sessions to register and authorize users, when they closed the browser and opened it, the fact of logging in to the user account was lost again, so these tutorials said That cookies must be used (since they are stored on the user's hard disk). After reviewing the video tutorials at http://www.youtube.com/watch?v=qFxUApU6104&list=plnxplpxphphhhtThrbb3322kkhhhhhhhhhhtgrbz3ym2Ek0h4jQvYAxuPLBe , http://www.youtube.com/watch?v=ASdD2gasVsA&list=PLYZm5HGTHGRPhp2p4xwpxhpbhhhhhhhhhhh , ? v = Nyk60llAcMc & list = PLYZm5HGThGRBZ3ym2Ek0h4jQvYAxuPLBe , http://www.youtube.com/watch?v=usmj-iQGkII&list=PLYZm5HGThGRBZ3ym2Ek0h4jQvYAppn our name our name our name which name isplpl5HGTHGRBZ35GGGR2GGGGR I thought, but it was not possible to achieve the fixation of the entrance to the account when closing and opening the browser. Help write, using cookies, given that there may be several for one user in case a person for some reason decided to create several accounts for one site, registration and authorization with saving the login to the site. I give the code
<?php $connect = mysql_connect('localhost', 'root', '') or die(mysql_error()); mysql_select_db('tutorials'); if (isset($_POST['submit'])){ $username = $_POST['username']; $login = $_POST['login']; $password = $_POST['password']; $r_password = $_POST['r_password']; if ($password == $r_password){ $password = md5($password); $query = mysql_query("INSERT INTO users VALUES ('', '$username', '$login', '$password')"); //setcookie($login, $password, time() + 3600*24*7, "/"); } else { die('Passwords not match'); } } if (isset($_POST['enter'])){ //echo "OK"; $e_login = $_POST['e_login']; $e_password = md5($_POST['e_password']); $query = mysql_query("SELECT * FROM users WHERE login='$e_login'"); $user_data = mysql_fetch_array($query); if ($user_data['password'] == $e_password) { setcookie($e_login, $e_password, time() + 3600*24*7, "/"); echo '<form method="post" action="register.php"> <input type="text" name="username" placeholder="| Username" required /><br> <input type="text" name="login" placeholder="| Login" required /><br> <input type="password" name="password" placeholder="| Password" required /><br> <input type="password" name="r_password" placeholder="| Repeat password" required /><br> <input type="submit" name="submit" value="Register" /><br> </form>'; echo 'You have already logged in<br> <form method="post" action="register.php"> <input type="submit" name="logout" value="Logout" /> </form>'; } else { echo "Wrong password or login"; } } else { setcookie($e_login, $e_password, time() - 3600*24*7, "/"); echo '<form method="post" action="register.php"> <input type="text" name="username" placeholder="| Username" required /><br> <input type="text" name="login" placeholder="| Login" required /><br> <input type="password" name="password" placeholder="| Password" required /><br> <input type="password" name="r_password" placeholder="| Repeat password" required /><br> <input type="submit" name="submit" value="Register" /><br> </form>'; echo '<form method="post" action="register.php"> <input type="text" name="e_login" placeholder="| Entered login" required /><br> <input type="password" name="e_password" placeholder="| Entered password" required /><br> <input type="submit" name="enter" value="Enter" /><br> </form>'; } ?> 
