curl hitting the url but data not recieved by server - php

Question

Can anyone help me? I am tring to hit a website using curl.
My code is as follows:
$data = array(
'utm_source'=>'Google',
'utm_medium'=>'Google',
'utm_campaign'=>'Sales',
'utm_term'=>'united flights tickets'
);
$data = http_build_query($data, '', '&');
$proxies[] = 'user:password#71.6.46.151:443';
$proxies[] = 'user:password#14.102.19.206:61217';
$proxies[] = 'user:password#187.95.230.65:8080';
$url = 'https://www.example.com/index.php?'.$data;
$ch = curl_init();
if (isset($proxy)) { // If the $proxy variable is set, then
curl_setopt($ch, CURLOPT_PROXY, $proxy); // Set CURLOPT_PROXY with proxy in $proxy variable
}
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, TRUE);
curl_setopt($ch, CURLOPT_USERAGENT, 'Mozilla/5.0 (Windows NT 6.1; rv:5.0) Gecko/20100101 Firefox/5.0');
curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);
curl_setopt($ch, CURLOPT_HEADER, 1);
curl_setopt($ch, CURLOPT_REFERER, 'https://www.google.com');
curl_setopt($ch, CURLOPT_HTTPGET, 1);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, TRUE);
curl_setopt($ch, CURLOPT_POSTFIELDS,$data);
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, 1);
curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, 2);
curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 500);
curl_setopt($ch, CURLOPT_URL, $url);
$results = curl_exec($ch); // Execute a cURL request
if (curl_error($ch)) {
$error_msg = curl_error($ch);
}
$info = curl_getinfo($ch);
curl_close($ch);
print_r($error_msg);
print_r($info);
print_r($results);
It hits the website and also displayed in the Google Analytics account, but the only problem is that the refferer and source showing "direct" in Google Analytics.
If there is any other way to achive this, please tell me.