QR Code for the Current URL with PHP and Google Charts

gistfile1.php

function saveImage($your_url, $width, $height, $file) {
 
        $your_url    = urlencode($your_url);
        $url  = 'http://chart.apis.google.com/chart?chs='.$width.'x'.$height.'&cht=qr&chl='.$your_url';
 
        // initialize cURL settings
        $ch = curl_init ($url);
        curl_setopt($ch, CURLOPT_HEADER, 0);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
        curl_setopt($ch, CURLOPT_BINARYTRANSFER,1);
        curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);
 
        // fetch raw data  
        $rawdata = curl_exec($ch);
        curl_close($ch);
         
        // convert it to a GD image and save
        $img = imagecreatefromstring($rawdata);
        /* your image saving functions come here */
        imagedestroy($img);
    }