PHP Cookies works well on localhost, but it's not working on live server

Note: This issue is already solved, finally I found that it's not cookies problem, the problem is on unserialize() function. The serialized cookie which being the parameter of that function must be stripslash-ed first.

Hi there, I have a problem here about PHP Cookies. I'm using PHP Cookies to save user preferences. I've tested my code on my local machine (localhost using XAMPP). Everything's works very well, including the cookies. But when I uploaded it to the live server, the cookies not working at all. It seems that the setcookie() function do not write the cookie value. I've tested by echo-ing the cookie value both on my localhost and on my live server. $_COOKIE[] value on localhost is showing but not with the one in the live server.

I thought maybe it's related to the $expire time zone like the one's in this post http://anupraj.com.np/index.php/php-cookies-not-working-php-cookie-tutorial-and-scirpt/14 . But then I realized that I've set the cookies to expire in 1 month, not only in one hour like on that blog post. So I think that's not the case.

This is the content of setting.php

<?php
$defaultSettings['default_post_to'] = 'both';
$defaultSettings['timesince_style'] = 'simplify';
...
$defaultSettings['display_geo_info'] = 'true';
$defaultSettings['enable_javascript'] = 'true';

if(!isset($_COOKIE['settings'])){
    setcookie("settings", serialize($defaultSettings), time()+3600*24*30);
    header('Location: index.php');
}
$setting = unserialize($_COOKIE['settings']);
?>

And this is content of index.php

<?php
/*
ini_set ("display_errors", "1");
error_reporting(E_ALL);  
*/

session_start();

require_once("settings.php"); // Settings files
require_once('varlib.php'); // Get all possible passed variable
require_once('auth.php'); // Check for channel login status

// If inputbar form submitted
if( $_POST['inputbox'] ){
...
}
else{
    echo "SETTING COOKIE: <br/><br/>";
    // This print_r is only showing the $_COOKIE value (which is stored on $setting) on localhost but no on live server
        print_r($setting);
    switch( $com ){
        ...
    }
}
?>

I've search about it everywhere (Google, stackoverflow, asking friends on twiiter/FB) still no solutions

I hope some body could give me the solution here Thanks :)

Look at both path and domain parameters for the setcookie function. Reference: setcookie @ PHP docs http://php.net/manual/en/function.setcookie.php

Try this to set your cookie:

if ($on_localhost) { // change this
    $domain = '.localhost';
} else {
    $domain = '.webhoster.com'; // change this
}
setcookie(
    'settings',
    serialize($defaultSettings),
    time()+3600*24*30,
    '/',          // this is the path
    $domain       // this is the domain
);

Good luck!

Try this:

setcookie("settings", serialize($defaultSettings), time()+3600*24*30, '/'); // added path

Also, could it be that serialize($defaultSettings) result is too large?

Try exit() after the Location-header.

A Location-header does not prevent a PHP-script from executing further instructions, maybe there is something executed after the header that causes the misbehaviour.

Probably your server time is not correct therefore Cookeis are not working on server.

Try this:

setcookie("settings", serialize($defaultSettings), 0);

Setting expiration to zero will fix your issue in this case. or update your server time.

While applying solutions we get forgot the basic of Cookies.

Cookies are like headers. Like the headers, it should be sent before any output generates. then only it sets successfully. I have struggled a lot for this problem but when i went through the basics this problem got solved quickly.

this syntax will be enough to solve this problem...

setcookie(
'settings',
serialize($defaultSettings),
time()+3600*24*30,
'/'          // this is the path
);

来源：https://stackoverflow.com/questions/4427743/php-cookies-works-well-on-localhost-but-its-not-working-on-live-server

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