After trying to setup a simple login system with php and MySQL, I was informed of the MySQL depreciation so I started looking into mysqli.
Im still new to PHP and connecting to databases so I found a few online tutorials and I was able to setup a simple login script that works (I used this tutorial http://w3epic.com/php-mysql-login-system-a-super-simple-tutorial/). There is one part I am lost on.
Here is the code from my login page:
<html>
<head>
<title>User Login Form - PHP MySQL Ligin System | W3Epic.com</title>
</head>
<body>
<h1>User Login Form - PHP MySQL Ligin System | W3Epic.com</h1>
<?php
if (!isset($_POST['submit'])){
?>
<!-- The HTML login form -->
<form action="<?=$_SERVER['PHP_SELF']?>" method="post">
Username: <input type="text" name="username" /><br />
Password: <input type="password" name="password" /><br />
<input type="submit" name="submit" value="Login" />
</form>
<?php
} else {
require_once("db-const.php");
$mysqli = new mysqli(DB_HOST, DB_USER, DB_PASS, DB_NAME);
# check connection
if ($mysqli->connect_errno) {
echo "<p>MySQL error no {$mysqli->connect_errno} : {$mysqli->connect_error}</p>";
exit();
}
$username = $_POST['username'];
$password = $_POST['password'];
$sql = "SELECT * from clients WHERE username LIKE '{$username}' AND password LIKE '{$password}' LIMIT 1";
$result = $mysqli->query($sql);
if (!$result->num_rows == 1) {
echo "<p>Invalid username/password combination</p>";
} else {
echo "<p>Logged in successfully</p>";
// do stuffs
}
}
?>
</body>
</html>
It works and I am able to login.
However, I would like to re-direct the user to another page based on if it finds a match in the database or not
My thought was to do something like:
if (!$result->num_rows == 1) {
echo "<p>Invalid username/password combination</p>";
header( 'Location: http://www.galactek.com/support/offmaint.html' );
} else {
echo "<p>Logged in successfully</p>";
// do stuffs
header("Location:output.php");
}
However, this produces an error:
Warning: Cannot modify header information - headers already sent by (output started at /home4/galactek/public_html/test/login.php:7) in /home4/galactek/public_html/test/login.php on line 38
How can I successfully redirect the user?
