一个php把一组文件打包成zip的类

这段php类可以挨个添加文件到数组，最后将添加的文件打包成zip

1. /* $Id: zip.lib.php,v 1.1 2004/02/14 15:21:18 anoncvs_tusedb Exp $ */
2. // vim: expandtab sw=4 ts=4 sts=4:
5. /**
6. * Zip file creation class.
7. * Makes zip files.
8. *
9. * Last Modification and Extension By :
10. *
11. * Hasin Hayder
12. * HomePage : www.hasinme.info
13. * Email : countdraculla@gmail.com
14. * IDE : PHP Designer 2005
15. *
16. *
17. * Originally Based on :
18. *
19. * http://www.zend.com/codex.php?id=535&single=1
20. * By Eric Mueller <eric@themepark.com>
21. *
22. * http://www.zend.com/codex.php?id=470&single=1
23. * by Denis125 <webmaster@atlant.ru>
24. *
25. * a patch from Peter Listiak <mlady@users.sourceforge.net> for last modified
26. * date and time of the compressed file
27. *
28. * Official ZIP file format: http://www.pkware.com/appnote.txt
29. *
30. * @access public
31. */
32. class zipfile
33. {
34. /**
35. * Array to store compressed data
36. *
37. * @public array $datasec
38. */
39. public $datasec = array();
41. /**
42. * Central directory
43. *
44. * @public array $ctrl_dir
45. */
46. public $ctrl_dir = array();
48. /**
49. * End of central directory record
50. *
51. * @public string $eof_ctrl_dir
52. */
53. public $eof_ctrl_dir = "\x50\x4b\x05\x06\x00\x00\x00\x00";
55. /**
56. * Last offset position
57. *
58. * @public integer $old_offset
59. */
60. public $old_offset = 0;
63. /**
64. * Converts an Unix timestamp to a four byte DOS date and time format (date
65. * in high two bytes, time in low two bytes allowing magnitude comparison).
66. *
67. * @param integer the current Unix timestamp
68. *
69. * @return integer the current date in a four byte DOS format
70. *
71. * @access private
72. */
73. function unix2DosTime($unixtime = 0) {
74. $timearray = ($unixtime == 0) ? getdate() : getdate($unixtime);
76. if ($timearray['year'] < 1980) {
77. $timearray['year'] = 1980;
78. $timearray['mon'] = 1;
79. $timearray['mday'] = 1;
80. $timearray['hours'] = 0;
81. $timearray['minutes'] = 0;
82. $timearray['seconds'] = 0;
83. } // end if
85. return (($timearray['year'] - 1980) << 25) | ($timearray['mon'] << 21) | ($timearray['mday'] << 16) |
86. ($timearray['hours'] << 11) | ($timearray['minutes'] << 5) | ($timearray['seconds'] >> 1);
87. } // end of the 'unix2DosTime()' method
90. /**
91. * Adds "file" to archive
92. *
93. * @param string file contents
94. * @param string name of the file in the archive (may contains the path)
95. * @param integer the current timestamp
96. *
97. * @access public
98. */
99. function addFile($data, $name, $time = 0)
100. {
101. $name = str_replace('\\', '/', $name);
103. $dtime = dechex($this->unix2DosTime($time));
104. $hexdtime = '\x' . $dtime[6] . $dtime[7]
105. . '\x' . $dtime[4] . $dtime[5]
106. . '\x' . $dtime[2] . $dtime[3]
107. . '\x' . $dtime[0] . $dtime[1];
108. eval('$hexdtime = "' . $hexdtime . '";');
110. $fr = "\x50\x4b\x03\x04";
111. $fr .= "\x14\x00"; // ver needed to extract
112. $fr .= "\x00\x00"; // gen purpose bit flag
113. $fr .= "\x08\x00"; // compression method
114. $fr .= $hexdtime; // last mod time and date
116. // "local file header" segment
117. $unc_len = strlen($data);
118. $crc = crc32($data);
119. $zdata = gzcompress($data);
120. $zdata = substr(substr($zdata, 0, strlen($zdata) - 4), 2); // fix crc bug
121. $c_len = strlen($zdata);
122. $fr .= pack('V', $crc); // crc32
123. $fr .= pack('V', $c_len); // compressed filesize
124. $fr .= pack('V', $unc_len); // uncompressed filesize
125. $fr .= pack('v', strlen($name)); // length of filename
126. $fr .= pack('v', 0); // extra field length
127. $fr .= $name;
129. // "file data" segment
130. $fr .= $zdata;
132. // "data descriptor" segment (optional but necessary if archive is not
133. // served as file)
134. $fr .= pack('V', $crc); // crc32
135. $fr .= pack('V', $c_len); // compressed filesize
136. $fr .= pack('V', $unc_len); // uncompressed filesize
138. // add this entry to array
139. $this -> datasec[] = $fr;
141. // now add to central directory record
142. $cdrec = "\x50\x4b\x01\x02";
143. $cdrec .= "\x00\x00"; // version made by
144. $cdrec .= "\x14\x00"; // version needed to extract
145. $cdrec .= "\x00\x00"; // gen purpose bit flag
146. $cdrec .= "\x08\x00"; // compression method
147. $cdrec .= $hexdtime; // last mod time & date
148. $cdrec .= pack('V', $crc); // crc32
149. $cdrec .= pack('V', $c_len); // compressed filesize
150. $cdrec .= pack('V', $unc_len); // uncompressed filesize
151. $cdrec .= pack('v', strlen($name) ); // length of filename
152. $cdrec .= pack('v', 0 ); // extra field length
153. $cdrec .= pack('v', 0 ); // file comment length
154. $cdrec .= pack('v', 0 ); // disk number start
155. $cdrec .= pack('v', 0 ); // internal file attributes
156. $cdrec .= pack('V', 32 ); // external file attributes - 'archive' bit set
158. $cdrec .= pack('V', $this -> old_offset ); // relative offset of local header
159. $this -> old_offset += strlen($fr);
161. $cdrec .= $name;
163. // optional extra field, file comment goes here
164. // save to central directory
165. $this -> ctrl_dir[] = $cdrec;
166. } // end of the 'addFile()' method
169. /**
170. * Dumps out file
171. *
172. * @return string the zipped file
173. *
174. * @access public
175. */
176. function file()
177. {
178. $data = implode('', $this -> datasec);
179. $ctrldir = implode('', $this -> ctrl_dir);
181. return
182. $data .
183. $ctrldir .
184. $this -> eof_ctrl_dir .
185. pack('v', sizeof($this -> ctrl_dir)) . // total # of entries "on this disk"
186. pack('v', sizeof($this -> ctrl_dir)) . // total # of entries overall
187. pack('V', strlen($ctrldir)) . // size of central dir
188. pack('V', strlen($data)) . // offset to start of central dir
189. "\x00\x00"; // .zip file comment length
190. } // end of the 'file()' method
193. /**
194. * A Wrapper of original addFile Function
195. *
196. * Created By Hasin Hayder at 29th Jan, 1:29 AM
197. *
198. * @param array An Array of files with relative/absolute path to be added in Zip File
199. *
200. * @access public
201. */
202. function addFiles($files /*Only Pass Array*/)
203. {
204. foreach($files as $file)
205. {
206. if (is_file($file)) //directory check
207. {
208. $data = implode("",file($file));
209. $this->addFile($data,$file);
210. }
211. }
212. }
214. /**
215. * A Wrapper of original file Function
216. *
217. * Created By Hasin Hayder at 29th Jan, 1:29 AM
218. *
219. * @param string Output file name
220. *
221. * @access public
222. */
223. function output($file)
224. {
225. $fp=fopen($file,"w");
226. fwrite($fp,$this->file());
227. fclose($fp);
228. }
232. } // end of the 'zipfile' class