$url = "https://chart.googleapis.com/chart?";
$strPost = "cht=qr&chs=177x177&chl=http://opendummies.blogspot.in/";
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $url);
// curl_setopt($ch, CURLOPT_PROXY, $proxy);
curl_setopt($ch, CURLOPT_HEADER, 1);
curl_setopt($ch, CURLOPT_HTTPGET,1);
curl_setopt($ch, CURLOPT_RETURNTRANSFER,1);
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1);
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, 0);
curl_setopt($ch, CURLOPT_HTTPHEADER, Array("Content-Type: image/jpeg"));
curl_setopt($ch, CURLOPT_HEADER, FALSE);
curl_setopt($ch, CURLOPT_POSTFIELDS, $strPost); // add POST fields
curl_setopt($ch, CURLOPT_POST, 1);
header('Content-Type: image/jpeg');
echo $result = curl_exec($ch);
curl_close($ch);
output: