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header('Refresh: 2; login.php');
i understand the concept behind it just that it can't work on my system.
can anyone help me solve my problem.
my error message is the following:
Warning: Cannot modify header information - headers already sent by (output started at C:\xampp\htdocs\fyp\do_login.php:60) in C:\xampp\htdocs\fyp\do_login.php on line 67
Sorry! Your username/password is incorrect.
Please try again.
You'll be redirected back to the login.
that page coding is something like this
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- <?php
- //Starting a session
- session_start();
- //NOTE: START SESSION BEFORE USING require()
- require('db.php');
- //Retrieve and password from form
- $uname = $_POST['username'];
- $pwd = MD5($_POST['pwd']);
- //Connect to database server and choose database:
- mysql_connect(MACHINE, USER,'');
- mysql_select_db(DBNAME);
- //Query to retrieve records from users table
- $sql = "select * from users where username='".$uname."' AND password='".$pwd."'";
- //Executing query...storing records in $result
- $result = mysql_query($sql);
- if(mysql_num_rows($result) == 1){ //valid user
- /*test*/
- //echo "Your username and password are correct.";
- //Saving info in session: no need to save password, but only testing!
- $_SESSION['username'] = $uname;
- $_SESSION['pwd'] = $pwd;
- $_SESSION['login'] = 1;
- $row = mysql_fetch_array($result);
- $role = $row['admin'];
- if($role ==1){
- $_SESSION['role'] ="admin";
- }//role =admin
- else if ($role ==2){
- $_SESSION['role'] ="manager";
- }//role = non-admin
- else{
- $_SESSION['role'] ="staff";
- }//role = non-admin
- $_SESSION['userid'] = $row['userid'];
- //Display link to index.php
- echo header('location: index.php');
- }
- else {
- $_SESSION['login'] = 0;
- }
- ?>
- <html>
- <head>
- <link rel="stylesheet" type="text/css" href="fyp.css" />
- </head>
- <body>
- <div id="header">
- </div>
- <div id="leftcol">
- <?php
- echo "<br><a href = login.php>Log In</a>";
- ?>
- </div>
- <div id="maincol">
- <?php
- header('Refresh: 2; login.php');
- echo "Sorry! Your username/password is incorrect.<br>";
- echo "Please try again.<br><br>";
- echo "You'll be redirected back to the login.";
- ?>
- </div>
- </body>
- </html>
