[PHP] Login && Register With Remember Me Option [mySQL] - Bartdevil - 10-10-2009
Firstly, create a mySQL account, and create a new table (in phpmyadmin) with this code.
Code: CREATE TABLE users (
username varchar(30),
password varchar(32));
Now, create a file named "database.php" and paste this code in
PHP Code: <?
/** * Connect to the mysql database. */ $conn = mysql_connect("localhost", "your_username", "your_password") or die(mysql_error()); mysql_select_db('your_database', $conn) or die(mysql_error());
?>
Now, create a file called "register.php" and paste in this code.
PHP Code: <? session_start(); include("database.php");
/** * Returns true if the username has been taken * by another user, false otherwise. */ function usernameTaken($username){ global $conn; if(!get_magic_quotes_gpc()){ $username = addslashes($username); } $q = "select username from users where username = '$username'"; $result = mysql_query($q,$conn); return (mysql_numrows($result) > 0); }
/** * Inserts the given (username, password) pair * into the database. Returns true on success, * false otherwise. */ function addNewUser($username, $password){ global $conn; $q = "INSERT INTO users VALUES ('$username', '$password')"; return mysql_query($q,$conn); }
/** * Displays the appropriate message to the user * after the registration attempt. It displays a * success or failure status depending on a * session variable set during registration. */ function displayStatus(){ $uname = $_SESSION['reguname']; if($_SESSION['regresult']){ ?>
<h1>Registered!</h1> <p>Thank you <b><? echo $uname; ?></b>, your information has been added to the database, you may now <a href="main.php" title="Login">log in</a>.</p>
<? } else{ ?>
<h1>Registration Failed</h1> <p>We're sorry, but an error has occurred and your registration for the username <b><? echo $uname; ?></b>, could not be completed.<br> Please try again at a later time.</p>
<? } unset($_SESSION['reguname']); unset($_SESSION['registered']); unset($_SESSION['regresult']); }
if(isset($_SESSION['registered'])){ /** * This is the page that will be displayed after the * registration has been attempted. */ ?>
<html> <title>Registration Page</title> <body>
<? displayStatus(); ?>
</body> </html>
<? return; }
/** * Determines whether or not to show to sign-up form * based on whether the form has been submitted, if it * has, check the database for consistency and create * the new account. */ if(isset($_POST['subjoin'])){ /* Make sure all fields were entered */ if(!$_POST['user'] || !$_POST['pass']){ die('You didn\'t fill in a required field.'); }
/* Spruce up username, check length */ $_POST['user'] = trim($_POST['user']); if(strlen($_POST['user']) > 30){ die("Sorry, the username is longer than 30 characters, please shorten it."); }
/* Check if username is already in use */ if(usernameTaken($_POST['user'])){ $use = $_POST['user']; die("Sorry, the username: <strong>$use</strong> is already taken, please pick another one."); }
/* Add the new account to the database */ $md5pass = md5($_POST['pass']); $_SESSION['reguname'] = $_POST['user']; $_SESSION['regresult'] = addNewUser($_POST['user'], $md5pass); $_SESSION['registered'] = true; echo "<meta http-equiv=\"Refresh\" content=\"0;url=$HTTP_SERVER_VARS[PHP_SELF]\">"; return; } else{ /** * This is the page with the sign-up form, the names * of the input fields are important and should not * be changed. */ ?>
<html> <title>Registration Page</title> <body> <h1>Register</h1> <form action="<? echo $HTTP_SERVER_VARS['PHP_SELF']; ?>" method="post"> <table align="left" border="0" cellspacing="0" cellpadding="3"> <tr><td>Username:</td><td><input type="text" name="user" maxlength="30"></td></tr> <tr><td>Password:</td><td><input type="password" name="pass" maxlength="30"></td></tr> <tr><td colspan="2" align="right"><input type="submit" name="subjoin" value="Join!"></td></tr> </table> </form> </body> </html>
<? } ?>
This registration page has:
Register Page
Register Failed
Register Success
Now create "login.php" and paste this code:
PHP Code: <?
/** * Checks whether or not the given username is in the * database, if so it checks if the given password is * the same password in the database for that user. * If the user doesn't exist or if the passwords don't * match up, it returns an error code (1 or 2). * On success it returns 0. */ function confirmUser($username, $password){ global $conn; /* Add slashes if necessary (for query) */ if(!get_magic_quotes_gpc()) { $username = addslashes($username); }
/* Verify that user is in database */ $q = "select password from users where username = '$username'"; $result = mysql_query($q,$conn); if(!$result || (mysql_numrows($result) < 1)){ return 1; //Indicates username failure }
/* Retrieve password from result, strip slashes */ $dbarray = mysql_fetch_array($result); $dbarray['password'] = stripslashes($dbarray['password']); $password = stripslashes($password);
/* Validate that password is correct */ if($password == $dbarray['password']){ return 0; //Success! Username and password confirmed } else{ return 2; //Indicates password failure } }
/** * checkLogin - Checks if the user has already previously * logged in, and a session with the user has already been * established. Also checks to see if user has been remembered. * If so, the database is queried to make sure of the user's * authenticity. Returns true if the user has logged in. */ function checkLogin(){ /* Check if user has been remembered */ if(isset($_COOKIE['cookname']) && isset($_COOKIE['cookpass'])){ $_SESSION['username'] = $_COOKIE['cookname']; $_SESSION['password'] = $_COOKIE['cookpass']; }
/* Username and password have been set */ if(isset($_SESSION['username']) && isset($_SESSION['password'])){ /* Confirm that username and password are valid */ if(confirmUser($_SESSION['username'], $_SESSION['password']) != 0){ /* Variables are incorrect, user not logged in */ unset($_SESSION['username']); unset($_SESSION['password']); return false; } return true; } /* User not logged in */ else{ return false; } }
/** * Determines whether or not to display the login * form or to show the user that he is logged in * based on if the session variables are set. */ function displayLogin(){ global $logged_in; if($logged_in){ echo "<h1>Logged In!</h1>"; echo "Welcome <b>$_SESSION[username]</b>, you are logged in. <a href=\"logout.php\">Logout</a>"; } else{ ?>
<h1>Login</h1> <form action="" method="post"> <table align="left" border="0" cellspacing="0" cellpadding="3"> <tr><td>Username:</td><td><input type="text" name="user" maxlength="30"></td></tr> <tr><td>Password:</td><td><input type="password" name="pass" maxlength="30"></td></tr> <tr><td colspan="2" align="left"><input type="checkbox" name="remember"> <font size="2">Remember me next time</td></tr> <tr><td colspan="2" align="right"><input type="submit" name="sublogin" value="Login"></td></tr> <tr><td colspan="2" align="left"><a href="register.php">Join</a></td></tr> </table> </form>
<? } }
/** * Checks to see if the user has submitted his * username and password through the login form, * if so, checks authenticity in database and * creates session. */ if(isset($_POST['sublogin'])){ /* Check that all fields were typed in */ if(!$_POST['user'] || !$_POST['pass']){ die('You didn\'t fill in a required field.'); } /* Spruce up username, check length */ $_POST['user'] = trim($_POST['user']); if(strlen($_POST['user']) > 30){ die("Sorry, the username is longer than 30 characters, please shorten it."); }
/* Checks that username is in database and password is correct */ $md5pass = md5($_POST['pass']); $result = confirmUser($_POST['user'], $md5pass);
/* Check error codes */ if($result == 1){ die('That username doesn\'t exist in our database.'); } else if($result == 2){ die('Incorrect password, please try again.'); }
/* Username and password correct, register session variables */ $_POST['user'] = stripslashes($_POST['user']); $_SESSION['username'] = $_POST['user']; $_SESSION['password'] = $md5pass;
/** * This is the cool part: the user has requested that we remember that * he's logged in, so we set two cookies. One to hold his username, * and one to hold his md5 encrypted password. We set them both to * expire in 100 days. Now, next time he comes to our site, we will * log him in automatically. */ if(isset($_POST['remember'])){ setcookie("cookname", $_SESSION['username'], time()+60*60*24*100, "/"); setcookie("cookpass", $_SESSION['password'], time()+60*60*24*100, "/"); }
/* Quick self-redirect to avoid resending data on refresh */ echo "<meta http-equiv=\"Refresh\" content=\"0;url=$HTTP_SERVER_VARS[PHP_SELF]\">"; return; }
/* Sets the value of the logged_in variable, which can be used in your code */ $logged_in = checkLogin();
?> [/spoiler]
Now, create a file called "logout.php" and paste this code.
[spoiler] PHP Code: <? session_start(); include("database.php"); include("login.php");
/** * Delete cookies - the time must be in the past, * so just negate what you added when creating the * cookie. */ if(isset($_COOKIE['cookname']) && isset($_COOKIE['cookpass'])){ setcookie("cookname", "", time()-60*60*24*100, "/"); setcookie("cookpass", "", time()-60*60*24*100, "/"); }
?>
<html> <title>Logging Out</title> <body>
<?
if(!$logged_in){ echo "<h1>Error!</h1>\n"; echo "You are not currently logged in, logout failed. Back to <a href=\"main.php\">main</a>"; } else{ /* Kill session variables */ unset($_SESSION['username']); unset($_SESSION['password']); $_SESSION = array(); // reset session array session_destroy(); // destroy session.
echo "<h1>Logged Out</h1>\n"; echo "You have successfully <b>logged out</b>. Back to <a href=\"main.php\">main</a>"; }
?>
</body> </html>
Now of course, you'll be needing a main page.
So create a new file called "main.php" and paste in this code:
PHP Code: <? /* Include Files *********************/ session_start(); include("database.php"); include("login.php"); /*************************************/ ?>
<html> <title>Your site - Main Area</title> <body>
<? if($logged_in){ echo 'Logged in as '.$_SESSION['username'].', <a href="logout.php">logout</a>'; }else{ echo 'Not logged in.'; } ?>
</body> </html>
Credits:
Enjoy.
+REP is appreciated.
RE: [PHP] Login && Register With Remember Me Option [mySQL] - Akshay* - 10-10-2009
NOt bad
RE: [PHP] Login && Register With Remember Me Option [mySQL] - Extasey - 10-10-2009
niice...
Whats with the weird font though? All smooshed together and bold font = hard to read.
RE: [PHP] Login && Register With Remember Me Option [mySQL] - Bartdevil - 10-10-2009
(10-10-2009, 06:07 AM)Extasey Wrote: niice...
Whats with the weird font though? All smooshed together and bold font = hard to read.
Ah, true, ill change it.
Updated
RE: [PHP] Login && Register With Remember Me Option [mySQL] - andrewjs18 - 10-10-2009
nice tutorial...it's good for php newbs like me...question....when I go to the register.php file and enter in a username/password and it redirects and you hit the 'log in' link, it takes me to the main.php file and it says not logged in, but it doesn't give me an option to log in...
RE: [PHP] Login && Register With Remember Me Option [mySQL] - Bartdevil - 10-11-2009
(10-10-2009, 03:01 PM)andrewjs18 Wrote: nice tutorial...it's good for php newbs like me...question....when I go to the register.php file and enter in a username/password and it redirects and you hit the 'log in' link, it takes me to the main.php file and it says not logged in, but it doesn't give me an option to log in...
You register, and you go to "login.php"
RE: [PHP] Login && Register With Remember Me Option [mySQL] - brett7 - 10-11-2009
nice script
RE: [PHP] Login && Register With Remember Me Option [mySQL] - andrewjs18 - 10-11-2009
(10-11-2009, 02:51 AM)Bartdevil Wrote: You register, and you go to "login.php"
no.....when I register an account and hit login, it redirects me to main.php...
I copy/pasted all your code so it's not a coding error on my part.
RE: [PHP] Login && Register With Remember Me Option [mySQL] - HuNt3R - 10-11-2009
Not that great, not that bad
RE: [PHP] Login && Register With Remember Me Option [mySQL] - Bartdevil - 10-11-2009
It's not my coding.. you've failed somewere, or your just successfully logged in..
I've copy and pasted the coding, along with 2 friends no errors.
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