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I'm working through Larry's PhP 6 and MySqL 5 book which so far has been excellent but I've hit a snag I can't get past.

 

On Chapter 11 'Cookies & Sessions'

 

I've completed page 327 - 339 and when I test my pages on my MacOSX running Xampp I get errors shown below.

 

Warning: Cannot modify header information - headers already sent by (output started at /Applications/XAMPP/xamppfiles/htdocs/php/mysqli_connect.php:4) in /Applications/XAMPP/xamppfiles/htdocs/php/ch11/login.php on line 23

 

Warning: Cannot modify header information - headers already sent by (output started at /Applications/XAMPP/xamppfiles/htdocs/php/mysqli_connect.php:4) in /Applications/XAMPP/xamppfiles/htdocs/php/ch11/login.php on line 24

 

Warning: Cannot modify header information - headers already sent by (output started at /Applications/XAMPP/xamppfiles/htdocs/php/mysqli_connect.php:4) in /Applications/XAMPP/xamppfiles/htdocs/php/ch11/login.php on line 28

 

I've checked the code and removed all the spaces after the final ?> php tag but I still get the error.

 

Could you help please, many thanks in advance.

 

Below is the code on 'Login.php'

Line 23/24 is the setcookie function

Line 28 is the header function

 

<?php # Script 9.3 - login.php
// This page processes the login form submission.
// Upon successful login, the user is redirected.
// Two included files are necessary.
// Send NOTHING to the Web browser prior to the setcookie() lines!
// Check if the form has been submitted:
if (isset($_POST['submitted'])) {
// For processing the login:
require_once ('includes/login_functions.inc.php');

// Need the database connection:
require_once ('../mysqli_connect.php');

// Check the login:
list ($check, $data) = check_login($dbc, $_POST['email'], $_POST['pass']);

if ($check) { // OK!

 // Set the cookies:
 setcookie ('user_id', $data['user_id']);
 setcookie ('first_name', $data['first_name']);

 // Redirect:
 $url = absolute_url ('loggedin.php');
 header("Location:$url");
 exit(); // Quit the script.

} else { // Unsuccessful!
 // Assign $data to $errors for error reporting
 // in the login_page.inc.php file.
 $errors = $data;
}
mysqli_close($dbc); // Close the database connection.
} // End of the main submit conditional.
// Create the page:
include ('includes/login_page.inc.php');
?>

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Clue is in the error message: output started at /Applications/XAMPP/xamppfiles/htdocs/php/mysqli_connect.php:4

 

Check your mysqli_connect.php script for whitespace: make sure there's no whitespace before the opening <?php and remove the closing ?> if the file doesn't contain any html.

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  • 3 years later...

This books is very well thought-out. Love the book.

There's this challenge for me: I, too, can not figure out why this does not work. I'm on hmm. 3 hours ish 4 hours ish? On this.

:'( I tried searching for white space and have not been successful. 

 

function redirect_user ($page = 'loggedin.php') 
{
$url = 'http://' . $_SERVER['localhost'] . dirname($_SERVER['htdocs']);
 
$url = rtrim($url, '/\\');
 
 
$url .= '/' . $page;
 
// Redirect the user:
header("Location: $url");
exit(); // Quit the script.
 
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