Unable to set Cookie in php

StackOverflow https://stackoverflow.com/questions/16439568

  •  14-04-2022
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题

I am working with social login. I tried login with facebook. Once the user is authenticated I can get their value and I need to set their id in a cookie so that I can create a session across the site.

Here is my code,

<?php
/*
 * login_with_facebook.php
 *
 * @(#) $Id: login_with_facebook.php,v 1.2 2012/10/05 09:22:40 mlemos Exp $
 *
 */
    require('http.php');
    require('oauth_client.php');

    $client = new oauth_client_class;
    $client->server = 'Facebook';
    $client->redirect_uri = 'http://'.$_SERVER['HTTP_HOST'].
        dirname(strtok($_SERVER['REQUEST_URI'],'?')).'/login_with_facebook.php';

    $client->client_id = ''; $application_line = __LINE__;
    $client->client_secret = '';

    if(strlen($client->client_id) == 0
    || strlen($client->client_secret) == 0)
        die('Please go to Facebook Apps page https://developers.facebook.com/apps , '.
            'create an application, and in the line '.$application_line.
            ' set the client_id to App ID/API Key and client_secret with App Secret');

    /* API permissions
     */
    $client->scope = 'email';
    if(($success = $client->Initialize()))
    {
        if(($success = $client->Process()))
        {
            if(strlen($client->access_token))
            {
                $success = $client->CallAPI(
                    'https://graph.facebook.com/me', 
                    'GET', array(), array('FailOnAccessError'=>true), $user);
            }
        }
        $success = $client->Finalize($success);
    }
    if($client->exit)
        exit;
    if($success)
    {
?>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>Facebook OAuth client results</title>
</head>
<body>
<?php

echo "This is id i got from facebook ".$user->id." I am unable to set this value in cookie.";

mysql_connect('localhost', 'user_id', 'pwd');
mysql_select_db("DB Name");     

$sql    =   "INSERT INTO oauth SET auth_id  = ".$user->id.",
                                   name     = '".$user->name."',
                                   email    = '".$user->email."',
                                   link     = '".$user->link."'";
mysql_query($sql);

if(isset($_COOKIE['auth_id']))
    unset($_COOKIE['auth_id']);

setcookie("auth_id", $user->id, time()+60*60*24, "/");
?>

<script>
//window.close();
</script>
</body>
</html>
<?php
    }
    else
    {
?>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>OAuth client error</title>
</head>
<body>
<h1>OAuth client error</h1>
<pre>Error: <?php echo HtmlSpecialChars($client->error); ?></pre>
</body>
</html>
<?php
    }
?>

Just setting the cookie after updating my domain. But this is not working for me.

有帮助吗？

解决方案

As from the php.net website: Like other headers, cookies must be sent before any output from your script (this is a protocol restriction). (http://www.php.net/manual/en/function.setcookie.php).

You cannot set a cookie if you have already started output. Therefor you need to pull your setcookie code to above your first HTML.

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