这里为各位提供一款远程文件下载代码，我们可以把远程的文件用php下载到本地指定的目录,下面就是一款下载远程服务器文件代码类。

1. class download
2. {
3. var $url;//远程文件地址
4. var $file_name = "hdwiki.zip";//下载来的文件名称
5. var $save_path = "./www.phpfensi.com";//下载到本地的文件路径
6. var $localfile;//下载到本地文件的路径和名称
7. var $warning;//警告信息
8. var $redown=0;//是否重新下载
9. /*初始化*/
10. function seturl($url)
11. {
12. if(!emptyempty($url))$this->url = $url;
13. }
14. function setfilename($file_name)
15. {
16. if(!emptyempty($file_name))$this->file_name = $file_name;
17. }
18. function setsavepath($save_path)
19. {
20. if(!emptyempty($save_path))$this->save_path = $save_path;
21. }
22. function setredown($redown)
23. {
24. if(!emptyempty($redown))$this->redown = $redown;
25. }
26. function download($url, $redown = 0, $save_path = 0, $file_name = 0)
27. {
28. $this->seturl($url);
29. $this->setfilename($file_name);
30. $this->setsavepath($save_path);
31. $this->setredown($redown);
32. if(!file_exists($this->save_path))
33. {
34. $dir = explode("/",$this->save_path);
35. foreach($dir as $p)
36. mkdir($p);
37. }
38. }
39. /* 检查url合法性函数 */
40. function checkurl(){
41. return preg_match("/^(http|ftp)(://)([a-za-z0-9-_]+[./]+[w-_/]+.*)+$/i", $this->url);
42. }
43. //下载文件到本地
44. function downloadfile()
45. {
46. //检测变量
47. $this->localfile = $this->save_path."/".$this->file_name;
48. if($this->url == "" || $this->localfile == ""){
49. $this->warning = "error: 变量设置错误.";
50. return $this->warning;
51. }
52. if (!$this->checkurl()){
53. $this->warning = "error: url ". $this->url ." 不合法.";
54. return $this->warning;
55. }
56. if (file_exists($this->localfile)){
57. if($this->redown)
58. {
59. unlink($this->localfile);
60. }
61. else
62. {
63. $this->warning = "warning: 升级文件 ". $this->localfile ." 已经存在！ 重新下载" >;
64. return $this->warning;
65. //exit("error: 本地文件 ". $this->localfile ." 已经存在,请删除或改名后重新运行本程序.");
66. }
67. }
68. //打开远程文件
69. $fp = fopen($this->url, "rb");
70. if (!$fp){
71. $this->warning = "error: 打开远程文件 ". $this->url ." 失败.";
72. return $this->warning;
73. }
74. //打开本地文件
75. $sp = fopen($this->localfile, "wb");
76. if (!$sp){
77. $this->warning = "error: 打开本地文件 ". $this->localfile ." 失败.";
78. return $this->warning;
79. }
80. //下载远程文件
81. //echo "正在下载远程文件，请等待";
82. while (!feof($fp)){
83. $tmpfile .= fread($fp, 1024);
84. //echo strlen($tmpfile);
85. }
86. //保存文件到本地
87. fwrite($sp, $tmpfile);
88. fclose($fp);
89. fclose($sp);
90. if($this->redown)
91. $this->warning = "success: 重新下载文件 ". $this->file_name ." 成功";
92. else
93. $this->warning = "success: 下载文件 ". $this->file_name ." 成功";
94. return $this->warning;
95. }
96. }