Description:
------------
I can't solve some problem while trying to get a site content via 
socks5 proxy (CURL Information: libcurl/7.13.1 OpenSSL/0.9.7d zlib/1.1.4) 

  While trying to do like this: 

Reproduce code:
---------------
 <?php
        error_reporting(E_ALL); 
        $ch = curl_init ();
        curl_setopt ($ch, CURLOPT_URL, "http://www.yahoo.com");
        curl_setopt ($ch, CURLOPT_TIMEOUT, 30);
        curl_setopt ($ch, CURLOPT_PROXY, "192.168.1.12:1080");
        curl_setopt ($ch, CURLOPT_PROXYTYPE, CURLPROXY_SOCKS5);
        curl_setopt ($ch, CURLOPT_RETURNTRANSFER, TRUE);
        curl_setopt ($ch, CURLOPT_FAILONERROR, true);
        curl_setopt ($ch, CURLOPT_FOLLOWLOCATION, 1);
        $result = curl_exec($ch);
        print curl_errno ($ch);
        print $result;
        curl_close ($ch);
        ?>

Expected result:
----------------
I get: print $result is Ok;

        Notice: Use of undefined constant CURLOPT_PROXYTYPE - assumed 'CURLOPT_PROXYTYPE' in /home/jim/php/curl_socks.php on line 7 
        Notice: Use of undefined constant CURLPROXY_SOCKS5 - assumed 'CURLPROXY_SOCKS5' in /home/jim/php/curl_socks.php on line 7

Actual result:
--------------
But: The socks proxy is ok => $result also Ok!
PS: PLEASE CHECK ERROR (Near Notices)

THANKS::FOR_YOUR_WORK