php调用google接口生成二维码实例

例子，调用google接口来实现二维码。

1. 
   
2. ?php
   
3. $data = isset($_GET['t']) ? $_GET['t'] : 'http://www.XXX.com';
   
4. $size = isset($_GET['size']) ? $_GET['size'] : '150x150';
   
5. $logo = isset($_GET['logo']) ? $_GET['logo'] :"./image/logo.jpg";
   
6. $chl = urlencode($logo);
   
7. $png = "http://chart.googleapis.com/chart?chs=$size&cht=qr&chl=$chl&chld=L|1&choe=UTF-8";
   
8. $QR = imagecreatefrompng($png);//外面那QR图
   
9. //以下是二维码生成的主要代码
   
10. if ($logo !== FALSE) {
    
11. $logo = imagecreatefromstring(file_get_contents($logo));
    
12. $QR_width = imagesx($QR);
    
13. $QR_height = imagesy($QR);
    
14. $logo_width = imagesx($logo);
    
15. $logo_height = imagesy($logo);
    
16. $logo_qr_width = $QR_width/5;
    
17. $scale = $logo_width/$logo_qr_width;
    
18. $logo_qr_height = $logo_height/$scale;
    
19. $from_width = ($QR_width-$logo_qr_width)/2;
    
20. imagecopyresampled($QR, $logo, $from_width, $from_width, 0, 0, $logo_qr_width, $logo_qr_height, $logo_width, $logo_height);
    
21. }
    
22. header('Content-type: image/png');
    
23. imagepng($QR);
    
24. //销毁二维码图像
    
25. imagedestroy($QR);
    
26. ?>
    

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