phpgd库实现远程图片的下载

2. /**
3. * 远程图片的下载
4. * by bbs.it-home.org
5. */
6. header("Content-type:text/html ; charset=utf-8");
8. if (!empty($_POST['submit'])){
9. $url = $_POST['url'];
10. $pictureName = $_POST['pictureName'];
11. $img = getPicture($url,$pictureName);
12. echo '
    ';
13. }
14. function getPicture($url,$pictureName){
15. if ($url == "") return false;
16. //获取图片的扩展名
17. $info = getimagesize($url);
18. $mime = $info['mime'];
19. $type = substr(strrchr($mime,'/'), 1);
20. //不同的图片类型选择不同的图片生成和保存函数
21. switch($type){
22. case 'jpeg':
23. $img_create_func = 'imagecreatefromjpeg';
24. $img_save_func = 'imagejpeg';
25. $new_img_ext = 'jpg';
26. break;
27. case 'png':
28. $img_create_func = 'imagecreatefrompng';
29. $img_save_func = 'imagepng';
30. $new_img_ext = 'png';
31. break;
32. case 'bmp':
33. $img_create_func = 'imagecreatefrombmp';
34. $img_save_func = 'imagebmp';
35. $new_img_ext = 'bmp';
36. break;
37. case 'gif':
38. $img_create_func = 'imagecreatefromgif';
39. $img_save_func = 'imagegif';
40. $new_img_ext = 'gif';
41. break;
42. case 'vnd.wap.wbmp':
43. $img_create_func = 'imagecreatefromwbmp';
44. $img_save_func = 'imagewbmp';
45. $new_img_ext = 'bmp';
46. break;
47. case 'xbm':
48. $img_create_func = 'imagecreatefromxbm';
49. $img_save_func = 'imagexbm';
50. $new_img_ext = 'xbm';
51. break;
52. default:
53. $img_create_func = 'imagecreatefromjpeg';
54. $img_save_func = 'imagejpeg';
55. $new_img_ext = 'jpg';
56. }
57. if ($pictureName == ""){
58. $pictureName = time().".{$new_img_ext}";
59. }else{
60. $pictureName = $pictureName.".{$new_img_ext}";
61. }
62. $src_im = $img_create_func($url); //由url创建新图片
63. $img_save_func($src_im, $pictureName); //输出文件到文件
64. return $pictureName;
65. }
66. ?>

2，网页内容部分

运行结果如下图：（图片自动保存在当前文件目录）