作为cronjob运行时，facebook.php标头发送错误

Question

I have a file which includes facebook.php and it runs without any error if i run the URL directly. But when i run it as cronjob i get the following error in email

<br />
<b>Warning</b>:  session_start() [<a
href='function.session-start'>function.session-start</a>]: Cannot send session
cookie - headers already sent in
<b>/home/username/public_html/pathtofile/facebook.php</b> on line
<b>37</b><br />

And there is nothing being echoed before the inclusion of facebook.php since this file is being included at the top.

require('facebook.php');
include_once("config.php");
include_once("functions.php");
 $app_id = 'my_app_id';
 $app_secret = 'my_app_secret';
 $facebook = new Facebook(array(
   'appId'  => $app_id,
   'secret' => $app_secret,
 ));

What could be the possible error?

Answer 1

Maybe your session is already started

if(!session_id()){
session_start();
}

Answer 2

same problem here. I wasn't able to pull much use from it, but I did find this (in case you haven't already seen it): issues with php command line

I commented out the session_start() line in my facebook.php include file as a workaround ... seems to be working as best I can tell. Doesn't make much sense to me, but did either of you come up with a definitive reason and/or direction? I'm a little surprised there isn't more discussion/google results about it....

Answer 3

The issue is with php command line so its better to run at cron with wget instead of php-q

i used wget http://exampl.com/url_for_script.php at cron url

and its worked for me