Question

i am building a facebook app which is somehow generating these weird errors.
the following are the errors I am facing:

Warning: Cannot modify header information - headers already sent by (output started at /home/amitver/public_html/roadies/index.php:2) in /home/amitver/public_html/roadies/facebook.php on line 395

Warning: Cannot modify header information - headers already sent by (output started at /home/amitver/public_html/roadies/index.php:2) in /home/amitver/public_html/roadies/facebook.php on line 395

Warning: Cannot modify header information - headers already sent by (output started at /home/amitver/public_html/roadies/index.php:2) in /home/amitver/public_html/roadies/facebook.php on line 395

Warning: Cannot modify header information - headers already sent by (output started at /home/amitver/public_html/roadies/index.php:2) in /home/amitver/public_html/roadies/facebook.php on line 399

the first few lines in index.php are:

<?php

require_once 'facebook.php';
//facebook init
    $appapikey = '...';
    $appsecret = '...';
    $facebook = new Facebook($appapikey, $appsecret);
    $user_id = $facebook->require_login();


    $userInfo = $facebook->api_client->users_getInfo($user_id, array('name'));
    $name = $userInfo[0]['name'];

    //$useruidname = $facebook->api_client->fql_query("SELECT name FROM user WHERE uid='$user_id'");

    // Greet the currently logged-in user!
    echo 'Hello, '.$name;   

?>

the lines 394-400 in facebook.php are:

foreach ($cookies as $name => $val) {
  setcookie($this->api_key . '_' . $name, $val, (int)$expires, '', $this->base_domain);
  $_COOKIE[$this->api_key . '_' . $name] = $val;
}
$sig = self::generate_sig($cookies, $this->secret);
setcookie($this->api_key, $sig, (int)$expires, '', $this->base_domain);
$_COOKIE[$this->api_key] = $sig;

can someone help me solve this?

Answer 1

theres probably some newlines at the top of index.php that are getting outputted before the setcookie call.