PHP生成带LOGO的二维码图像

<?php
$urlToEncode="http://gz.altmi.com";  
generateQRfromGoogle($urlToEncode);  
function generateQRfromGoogle($chl,$widhtHeight =&#39;150&#39;,$EC_level=&#39;L&#39;,$margin=&#39;0&#39;) //开源代码phprm.com 
{  
    $url = urlencode($url);   
    echo &#39;<img src="http://chart.apis.google.com/chart?chs=&#39;.$widhtHeight.&#39;x&#39;.$widhtHeight.&#39;&cht=qr&chld=&#39;.$EC_level.&#39;|&#39;.$margin.&#39;&chl=&#39;.$chl.&#39;" alt="QR code" widhtHeight="&#39;.$size.&#39;" widhtHeight="&#39;.$size.&#39;"/>&#39;;  
}
?>

<?php
// QR Code + Logo Generator QR图片中间加logo 
$data = isset($_GET[&#39;data&#39;]) ? $_GET[&#39;data&#39;] : &#39;http://www.phprm.com&#39;; 
$size = isset($_GET[&#39;size&#39;]) ? $_GET[&#39;size&#39;] : &#39;130x130&#39;; 
$logo = isset($_GET[&#39;logo&#39;]) ? $_GET[&#39;logo&#39;] : &#39;./20130128160755.jpg&#39;;//中间那logo图 
$chl = urlencode($logo); 
$png = "http://chart.googleapis.com/chart?chs=$size&cht=qr&chl=$chl&chld=L|1&choe=UTF-8"; 
$QR = imagecreatefrompng($png);//外面那QR图 
if ($logo !== FALSE) { 
    $logo = imagecreatefromstring(file_get_contents($logo)); 
    $QR_width = imagesx($QR); 
    $QR_height = imagesy($QR); 
    $logo_width = imagesx($logo); 
    $logo_height = imagesy($logo); 
    $logo_qr_width = $QR_width/5; 
    $scale = $logo_width/$logo_qr_width; 
    $logo_qr_height = $logo_height/$scale; 
    $from_width = ($QR_width-$logo_qr_width)/2; 
    imagecopyresampled($QR, $logo, $from_width, $from_width, 0, 0, $logo_qr_width, $logo_qr_height, $logo_width, $logo_height); 
} 
header(&#39;Content-type: image/png&#39;); 
imagepng($QR); 
imagedestroy($QR);
?>