<?php

    // Connects to your Database
    include ("database.php");

    //Checks if there is a login cookie
    if(isset($_COOKIE['ID_my_site']))
    {
        $username = mysql_real_escape_string( $_COOKIE['ID_my_site'] );
        $pass = mysql_real_escape_string( $_COOKIE['Key_my_site'] );

        $check = mysql_query("SELECT * FROM users WHERE username = '$username' AND password = '$pass'")or die(mysql_error());

        while($info = mysql_fetch_array( $check ))
        {
            if ($pass == $info['password'])
                header("Location: members.php");
        }
    }

    //if the login form is submitted
    if (isset($_POST['submit']))
    { // if form has been submitted

        // makes sure they filled it in
        if(!$_POST['username'] | !$_POST['pass'])
            die('You did not fill in a required field.');

        // checks it against the database
         if (!get_magic_quotes_gpc())
            $_POST['email'] = addslashes($_POST['email']);

        $check = mysql_query("SELECT * FROM users WHERE username = '".$_POST['username']."'")or die(mysql_error());

        //Gives error if user dosen't exist
        $check2 = mysql_num_rows($check);

        if ($check2 == 0)
            die('That user does not exist in our database. <a href=add.php>Click Here to Register</a>');

        while($info = mysql_fetch_array( $check ))
        {
            $_POST['pass'] = stripslashes($_POST['pass']);
            $info['password'] = stripslashes($info['password']);
            $_POST['pass'] = md5($_POST['pass']);

            //gives error if the password is wrong
            if ($_POST['pass'] != $info['password'])
                die('Incorrect password, please try again.');
            else
            {
                // if login is ok then we add a cookie
                $_POST['username'] = stripslashes($_POST['username']);
                $hour = time() + 3600;
                setcookie(ID_my_site, $_POST['username'], $hour);
                setcookie(Key_my_site, $_POST['pass'], $hour);

                //then redirect them to the members area
                header("Location: members.php");
            }
        }
    }
    else
    {

     // if they are not logged in
 ?>
 <form action="<?php echo $_SERVER['PHP_SELF']?>" method="post">
 <table border="0">
 <tr><td colspan=2><h1>Login</h1></td></tr>
 <tr><td>Username:</td><td>
 <input type="text" name="username" maxlength="40">
 </td></tr>
 <tr><td>Password:</td><td>
 <input type="password" name="pass" maxlength="50">
 </td></tr>
 <tr><td colspan="2" align="right">
 <input type="submit" name="submit" value="Login">
 </td></tr>
 </table>
 </form>
 <?php

 }

 ?>