53 lines
2.2 KiB
PHP
53 lines
2.2 KiB
PHP
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<?php
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// Start the session
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session_start();
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require_once('config.php');
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// Try and connect using the info above
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$con = mysqli_connect($DATABASE_HOST, $DATABASE_USER, $DATABASE_PASS, $DATABASE_NAME);
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// Check for connection errors
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if (mysqli_connect_errno()) {
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// If there is an error with the connection, stop the script and display the error
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exit('Failed to connect to MySQL: ' . mysqli_connect_error());
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}
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// Now we check if the data from the login form was submitted, isset() will check if the data exists
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if (!isset($_POST['username'], $_POST['password'])) {
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// Could not get the data that should have been sent
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exit('Please fill both the username and password fields!');
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}
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// Prepare our SQL, which will prevent SQL injection
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if ($stmt = $con->prepare('SELECT id, password FROM accounts WHERE username = ?')) {
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// Bind parameters (s = string, i = int, b = blob, etc), in our case the username is a string so we use "s"
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$stmt->bind_param('s', $_POST['username']);
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$stmt->execute();
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// Store the result so we can check if the account exists in the database
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$stmt->store_result();
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// Check if account exists with the input username
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if ($stmt->num_rows > 0) {
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// Account exists, so bind the results to variables
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$stmt->bind_result($id, $password);
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$stmt->fetch();
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// Note: remember to use password_hash in your registration file to store the hashed passwords
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if (password_verify($_POST['password'], $password)) {
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// Password is correct! User has logged in!
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// Regenerate the session ID to prevent session fixation attacks
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session_regenerate_id();
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// Declare session variables (they basically act like cookies but the data is remembered on the server)
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$_SESSION['account_loggedin'] = TRUE;
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$_SESSION['account_name'] = $_POST['username'];
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$_SESSION['account_id'] = $id;
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// Redirect to the home page
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header('Location: home.php');
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exit;
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} else {
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// Incorrect password
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echo 'Incorrect username and/or password!';
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}
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} else {
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// Incorrect username
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echo 'Incorrect username and/or password!';
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}
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// Close the prepared statement
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$stmt->close();
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}
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?>
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