PHP Curl Tor Pages Not Displaying - php

Question

I have this code
<?php
$ua = array(
"Mozilla/5.0 (compatible; MSIE 9.0; AOL 9.7; AOLBuild 4343.19; Windows NT 6.1; WOW64; Trident/5.0; FunWebProducts)",
"Mozilla/5.0 (Macintosh; U; PPC Mac OS X Mach-O; XH; rv:8.578.498) fr, Gecko/20121021 Camino/8.723+ (Firefox compatible)",
"Mozilla/5.0 (Macintosh; Intel Mac OS X 10_10_1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/41.0.2227.1 Safari/537.36",
"Mozilla/5.0 (Windows NT 6.1; WOW64; rv:40.0) Gecko/20100101 Firefox/40.1",
"Mozilla/5.0 (compatible, MSIE 11, Windows NT 6.3; Trident/7.0; rv:11.0) like Gecko",
"Mozilla/5.0 (X11; U; Linux i686; fr-fr) AppleWebKit/525.1+ (KHTML, like Gecko, Safari/525.1+) midori/1.19",
"Opera/9.80 (X11; Linux i686; Ubuntu/14.10) Presto/2.12.388 Version/12.16",
"Mozilla/5.0 (Linux; U; Android 4.0.3; de-ch; HTC Sensation Build/IML74K) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30");
$uar = array_rand($ua);
$url = "sometestserverisetup";
$ip = '127.0.0.1';
$port = '9051';
$auth = 'mypwwhateveritis';
$command = 'signal NEWNYM';
$fp = fsockopen($ip,$port,$error_number,$err_string,10);
if(!$fp) { echo "ERROR: $error_number : $err_string";
return false;
} else {
fwrite($fp,"AUTHENTICATE \"".$auth."\"\n");
$received = fread($fp,512);
fwrite($fp,$command."\n");
$received = fread($fp,512);
}
fclose($fp);
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_PROXY, "127.0.0.1:9050");
curl_setopt($ch, CURLOPT_PROXYTYPE, CURLPROXY_SOCKS5);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_VERBOSE, 0);
curl_setopt($ch,CURLOPT_USERAGENT,$ua[$uar]);
$response = curl_exec($ch);
echo $response;
?>
everything works fine. With my test site and it displays correctly. However certain sites (google.com, amazon.com, youtube, facebook. only display a blank page for echo response.
Is there some curl set opt that needs to be enabled for pages to display properly.

Answer 1

Looking at a var_dump(curl_getinfo($ch)); after calling curl_exec can be helpful.
I tested your code and found in some cases the sites send a 302 Moved response with a Location header to redirect the browser which would result in an empty response on a successful request.
Adding
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1);
made it so that every site you mentioned always returned a response in my tests. And depending on what you are doing (searches, logins, form submissions) you will probably find redirects are common so you need to tell cURL to follow them with that option.
Beyond that, you can set CURLOPT_HEADER to true so you can look at the response headers sent to see what's going on in addition to curl_getinfo to make sure the connection was successful (either through Tor or to the site).