一个不错的PHP文件下载类

4. /**
5. ** php文件下载类
6. **范例：
7. $download=new download('php,exe,html',false);
8. if(!$download->downloadfile($filename))
9. {
10. echo $download->geterrormsg();
11. }
12. * by bbs.it-home.org
13. */
14. class download{
15. var $debug=true;
16. var $errormsg='';
17. var $Filter=array();
18. var $filename='';
19. var $mineType='text/plain';
20. var $xlq_filetype=array();

21. function download($fileFilter='',$isdebug=true)

22. {
23. $this->setFilter($fileFilter);
24. $this->setdebug($isdebug);
25. $this->setfiletype();
26. }

27. function setFilter($fileFilter)

28. {
29. if(empty($fileFilter)) return ;
30. $this->Filter=explode(',',strtolower($fileFilter));
31. }
32. function setdebug($debug)
33. {
34. $this->debug=$debug;
35. }

36. function setfilename($filename)

37. {
38. $this->filename=$filename;
39. }

40. function downloadfile($filename)

41. {
42. $this->setfilename($filename);
43. if($this->filecheck())
44. {
45. $fn = array_pop( explode( '/', strtr( $this->filename, '\\', '/' ) ) );
46. header( "Pragma: public" );
47. header( "Expires: 0" ); // set expiration time
48. header( "Cache-Component: must-revalidate, post-check=0, pre-check=0" );
49. header( "Content-type:".$this->mineType );
50. header( "Content-Length: " . filesize( $this->filename ) );
51. header( "Content-Disposition: attachment; filename=\"$fn\"" );
52. header( 'Content-Transfer-Encoding: binary' );
53. readfile( $this->filename );
54. return true;
55. }else
56. {
57. return false;
58. }
59. }
60. function geterrormsg()
61. {
62. return $this->errormsg;
63. }

64. function filecheck()

65. {
66. $filename=$this->filename;
67. if(file_exists($filename))
68. {
69. $filetype=strtolower(array_pop(explode('.',$filename)));
70. if(in_array($filetype,$this->Filter))
71. {
72. $this->errormsg.=$filename.'不允许下载！';
73. if($this->debug) exit($filename.'不允许下载！') ;
74. return false;
75. }else
76. {
77. if ( function_exists( "mime_content_type" ) )
78. {
79. $this->mineType = mime_content_type( $filename );
80. }
81. if(empty($this->mineType))
82. {
83. if( isset($this->xlq_filetype[$filetype]) ) $this->mineType = $this->xlq_filetype[$filetype];
84. }
85. if(!empty($this->mineType))
86. return true;
87. else
88. {
89. $this->errormsg.='获取'.$filename.'文件类型时候发生错误，或者不存在预定文件类型内';
90. if($this->debug) exit('获取文件类型出错');
91. return false;
92. }
93. }
94. }else
95. {
96. $this->errormsg.=$filename.'不存在!';
97. if($this->debug) exit($filename.'不存在!') ;
98. return false;
99. }
100. }

101. function setfiletype()

102. {
103. $this->xlq_filetype['chm']='application/octet-stream';
104. $this->xlq_filetype['ppt']='application/vnd.ms-powerpoint';
105. $this->xlq_filetype['xls']='application/vnd.ms-excel';
106. $this->xlq_filetype['doc']='application/msword';
107. $this->xlq_filetype['exe']='application/octet-stream';
108. $this->xlq_filetype['rar']='application/octet-stream';
109. $this->xlq_filetype['js']="javascript/js";
110. $this->xlq_filetype['css']="text/css";
111. $this->xlq_filetype['hqx']="application/mac-binhex40";
112. $this->xlq_filetype['bin']="application/octet-stream";
113. $this->xlq_filetype['oda']="application/oda";
114. $this->xlq_filetype['pdf']="application/pdf";
115. $this->xlq_filetype['ai']="application/postsrcipt";
116. $this->xlq_filetype['eps']="application/postsrcipt";
117. $this->xlq_filetype['es']="application/postsrcipt";
118. $this->xlq_filetype['rtf']="application/rtf";
119. $this->xlq_filetype['mif']="application/x-mif";
120. $this->xlq_filetype['csh']="application/x-csh";
121. $this->xlq_filetype['dvi']="application/x-dvi";
122. $this->xlq_filetype['hdf']="application/x-hdf";
123. $this->xlq_filetype['nc']="application/x-netcdf";
124. $this->xlq_filetype['cdf']="application/x-netcdf";
125. $this->xlq_filetype['latex']="application/x-latex";
126. $this->xlq_filetype['ts']="application/x-troll-ts";
127. $this->xlq_filetype['src']="application/x-wais-source";
128. $this->xlq_filetype['zip']="application/zip";
129. $this->xlq_filetype['bcpio']="application/x-bcpio";
130. $this->xlq_filetype['cpio']="application/x-cpio";
131. $this->xlq_filetype['gtar']="application/x-gtar";
132. $this->xlq_filetype['shar']="application/x-shar";
133. $this->xlq_filetype['sv4cpio']="application/x-sv4cpio";
134. $this->xlq_filetype['sv4crc']="application/x-sv4crc";
135. $this->xlq_filetype['tar']="application/x-tar";
136. $this->xlq_filetype['ustar']="application/x-ustar";
137. $this->xlq_filetype['man']="application/x-troff-man";
138. $this->xlq_filetype['sh']="application/x-sh";
139. $this->xlq_filetype['tcl']="application/x-tcl";
140. $this->xlq_filetype['tex']="application/x-tex";
141. $this->xlq_filetype['texi']="application/x-texinfo";
142. $this->xlq_filetype['texinfo']="application/x-texinfo";
143. $this->xlq_filetype['t']="application/x-troff";
144. $this->xlq_filetype['tr']="application/x-troff";
145. $this->xlq_filetype['roff']="application/x-troff";
146. $this->xlq_filetype['shar']="application/x-shar";
147. $this->xlq_filetype['me']="application/x-troll-me";
148. $this->xlq_filetype['ts']="application/x-troll-ts";
149. $this->xlq_filetype['gif']="image/gif";
150. $this->xlq_filetype['jpeg']="image/pjpeg";
151. $this->xlq_filetype['jpg']="image/pjpeg";
152. $this->xlq_filetype['jpe']="image/pjpeg";
153. $this->xlq_filetype['ras']="image/x-cmu-raster";
154. $this->xlq_filetype['pbm']="image/x-portable-bitmap";
155. $this->xlq_filetype['ppm']="image/x-portable-pixmap";
156. $this->xlq_filetype['xbm']="image/x-xbitmap";
157. $this->xlq_filetype['xwd']="image/x-xwindowdump";
158. $this->xlq_filetype['ief']="image/ief";
159. $this->xlq_filetype['tif']="image/tiff";
160. $this->xlq_filetype['tiff']="image/tiff";
161. $this->xlq_filetype['pnm']="image/x-portable-anymap";
162. $this->xlq_filetype['pgm']="image/x-portable-graymap";
163. $this->xlq_filetype['rgb']="image/x-rgb";
164. $this->xlq_filetype['xpm']="image/x-xpixmap";
165. $this->xlq_filetype['txt']="text/plain";
166. $this->xlq_filetype['c']="text/plain";
167. $this->xlq_filetype['cc']="text/plain";
168. $this->xlq_filetype['h']="text/plain";
169. $this->xlq_filetype['html']="text/html";
170. $this->xlq_filetype['htm']="text/html";
171. $this->xlq_filetype['htl']="text/html";
172. $this->xlq_filetype['rtx']="text/richtext";
173. $this->xlq_filetype['etx']="text/x-setext";
174. $this->xlq_filetype['tsv']="text/tab-separated-values";
175. $this->xlq_filetype['mpeg']="video/mpeg";
176. $this->xlq_filetype['mpg']="video/mpeg";
177. $this->xlq_filetype['mpe']="video/mpeg";
178. $this->xlq_filetype['avi']="video/x-msvideo";
179. $this->xlq_filetype['qt']="video/quicktime";
180. $this->xlq_filetype['mov']="video/quicktime";
181. $this->xlq_filetype['moov']="video/quicktime";
182. $this->xlq_filetype['movie']="video/x-sgi-movie";
183. $this->xlq_filetype['au']="audio/basic";
184. $this->xlq_filetype['snd']="audio/basic";
185. $this->xlq_filetype['wav']="audio/x-wav";
186. $this->xlq_filetype['aif']="audio/x-aiff";
187. $this->xlq_filetype['aiff']="audio/x-aiff";
188. $this->xlq_filetype['aifc']="audio/x-aiff";
189. $this->xlq_filetype['swf']="application/x-shockwave-flash";
190. }
191. }
192. ?>

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