title: What is CURLOPT_IPRESOLVE?
body: <p>I'm making Facebook login with Codeigniter.
  I have this error:</p>
  
  <p><em>A PHP Error was encountered</em></p>
  
  <p><em>Severity: Notice</em></p>
  
  <p><em>Message: Use of undefined constant CURLOPT_IPRESOLVE - assumed 'CURLOPT_IPRESOLVE'</em></p>
  
  <p><em>Filename: libraries/base_facebook.php</em></p>
  
  <p><em>Line Number: 1012</em></p>
  
  <p>I've read about it on StackOverflow. I have to update CURL, but how do I do that?
  My website is on free web hosting server (<a href="http://www.000webhost.com" rel="nofollow">http://www.000webhost.com</a>)
  Thanks in advance.</p>