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Hi everyone. I've done everything I could think of to get Script 11.8 to work, but I keep getting the error message 'The username and password you entered do not match those on file'. The users.txt is where it should be (because it worked fine for register.php) and the script is almost exactly how it is in the book. I'm using the same user names and passwords as well. Is this happening because I'm on a Mac? Oh, I'm on PHP 5.3.6 and use XAMPP. <?php // Script 11.8 - login.php $file = '../users/users.txt'; if ($_SERVER['REQUEST_METHOD'] == 'POST') { // Handle the form. $loggedin = FALSE; // Not currently signed in. // Enable auto_detect_line settings: ini_set('auto_detect_line_endings', 1); // Open the file: $fp = fopen($file, 'rb'); // Loop through the file: while ( $line = fgetcsv($fp, 200, "\t") ) { // Check the file data against the submitted data: if ( ($line[0] == $_POST['username']) AND ($line[1] == md5(trim($_POST['password']))) ) { $loggedin = TRUE; // Correct username/password combination. // Stop looping through the file: break; } // End of IF. } // End of WHILE. fclose ($fp); // Close the file. // Print a message: if ($loggedin) { print '<p>You are now logged in.</p>'; } else { print '<p style="color: red;">The username and password you entered do not match those on file.</p>'; } } else { // Display the form. // Leave PHP and display the form: ?> <form action="login.php" method="post"> <p>Username: <input type="text" name="username" size="20" /></p> <p>Password: <input type="password" name="password" size="20" /></p> <input type="submit" name="submit" value="Login" /></form> <?php } // End of submission IF. ?> </body> </html>