Question

I have tested my login script on my localhost with no problems.

I have now uploaded it online as can be seen at this link

Obviously if you click, you can see that a blank page is displayed and I have no idea why.

I did a test of a little bit of content, and removed the Facebook SDK code.

        //Facebook config (required for library)
    $fb_config = array(
            'appId'  => 'REMOVED',
            'secret' => 'REMOVED'
            );

    //Load Facebook library
    $this->load->library('facebook', $fb_config);

    //SET FACEBOOK USER 
    $fbuser = array();
    $fbuser = $this->facebook->getUser();

When the above code is not present, the page loads.

I have updated my app setting correctly, namely changing the site URL fro http://localhost to http://gua.com so i dont believe it is that.

I have even changed my CI settings to show all errors – nothing is shown.

Does anyone have any suggestions as to why the above code might be making a blank page load ONLY when it is hosted online?

Many Thanks
THomas

Answer 1

Open up the base_facebook.php and try removing either of these two lines from the top.

    if (!function_exists('curl_init')) {
      throw new Exception('Facebook needs the CURL PHP extension.');
    }
    if (!function_exists('json_decode')) {
      throw new Exception('Facebook needs the JSON PHP extension.');
    }

If you stop getting the white screen, it should indicate that your sever needs either curl or json_decode enabled.

Alternatively you could just do a echo phpinfo() and check if they are enabled. Note that json_decode/encode is only available in php >=5.2