PHPZip的使用

1. class PHPZip
2. {
3. function Zip($dir, $zipfilename)
4. {
5. if (@function_exists('gzcompress'))
6. {
7. $curdir = getcwd();
8. if (is_array($dir))
9. {
10. $filelist = $dir;
11. }
12. else
13. {
14. $filelist = $this -> GetFileList($dir);
15. }
17. if ((!empty($dir))&&(!is_array($dir))&&(file_exists($dir))) chdir($dir);
18. else chdir($curdir);
20. if (count($filelist)>0)
21. {
22. foreach($filelist as $filename)
23. {
24. if (is_file($filename))
25. {
26. $fd = fopen ($filename, "r");
27. $content = fread ($fd, filesize ($filename));
28. fclose ($fd);
30. if (is_array($dir)) $filename = basename($filename);
31. $this -> addFile($content, $filename);
32. }
33. }
34. $out = $this -> file();
36. chdir($curdir);
37. $fp = fopen($zipfilename, "w");
38. fwrite($fp, $out, strlen($out));
39. fclose($fp);
40. }
41. return 1;
42. }
43. else return 0;
44. }
46. function GetFileList($dir)
47. {
48. if (file_exists($dir))
49. {
50. $args = func_get_args();
51. $pref = $args[1];
53. $dh = opendir($dir);
54. while($files = readdir($dh))
55. {
56. if (($files!=".")&&($files!=".."))
57. {
58. if (is_dir($dir.$files))
59. {
60. $curdir = getcwd();
61. chdir($dir.$files);
62. $file = array_merge($file, $this -> GetFileList("", "$pref$files/"));
63. chdir($curdir);
64. }
65. else $file[]=$pref.$files;
66. }
67. }
68. closedir($dh);
69. }
70. return $file;
71. }
73. var $datasec = array();
74. var $ctrl_dir = array();
75. var $eof_ctrl_dir = "x50x4bx05x06x00x00x00x00";
76. var $old_offset = 0;
78. /**
79. * Converts an Unix timestamp to a four byte DOS date and time format (date
80. * in high two bytes, time in low two bytes allowing magnitude comparison).
81. *
82. * @param integer the current Unix timestamp
83. *
84. * @return integer the current date in a four byte DOS format
85. *
86. * @access private
87. */
88. function unix2DosTime($unixtime = 0) {
89. $timearray = ($unixtime == 0) ? getdate() : getdate($unixtime);
91. if ($timearray['year'] $timearray['year'] = 1980;
92. $timearray['mon'] = 1;
93. $timearray['mday'] = 1;
94. $timearray['hours'] = 0;
95. $timearray['minutes'] = 0;
96. $timearray['seconds'] = 0;
97. } // end if
99. return (($timearray['year'] - 1980) ($timearray['hours'] > 1);
100. } // end of the 'unix2DosTime()' method
103. /**
104. * Adds "file" to archive
105. *
106. * @param string file contents
107. * @param string name of the file in the archive (may contains the path)
108. * @param integer the current timestamp
109. *
110. * @access public
111. */
112. function addFile($data, $name, $time = 0)
113. {
114. $name = str_replace('', '/', $name);
116. $dtime = dechex($this->unix2DosTime($time));
117. $hexdtime = 'x' . $dtime[6] . $dtime[7]
118. . 'x' . $dtime[4] . $dtime[5]
119. . 'x' . $dtime[2] . $dtime[3]
120. . 'x' . $dtime[0] . $dtime[1];
121. eval('$hexdtime = "' . $hexdtime . '";');
123. $fr = "x50x4bx03x04";
124. $fr .= "x14x00"; // ver needed to extract
125. $fr .= "x00x00"; // gen purpose bit flag
126. $fr .= "x08x00"; // compression method
127. $fr .= $hexdtime; // last mod time and date
129. // "local file header" segment
130. $unc_len = strlen($data);
131. $crc = crc32($data);
132. $zdata = gzcompress($data);
133. $c_len = strlen($zdata);
134. $zdata = substr(substr($zdata, 0, strlen($zdata) - 4), 2); // fix crc bug
135. $fr .= pack('V', $crc); // crc32
136. $fr .= pack('V', $c_len); // compressed filesize
137. $fr .= pack('V', $unc_len); // uncompressed filesize
138. $fr .= pack('v', strlen($name)); // length of filename
139. $fr .= pack('v', 0); // extra field length
140. $fr .= $name;
142. // "file data" segment
143. $fr .= $zdata;
145. // "data descriptor" segment (optional but necessary if archive is not
146. // served as file)
147. $fr .= pack('V', $crc); // crc32
148. $fr .= pack('V', $c_len); // compressed filesize
149. $fr .= pack('V', $unc_len); // uncompressed filesize
151. // add this entry to array
152. $this -> datasec[] = $fr;
153. $new_offset = strlen(implode('', $this->datasec));
155. // now add to central directory record
156. $cdrec = "x50x4bx01x02";
157. $cdrec .= "x00x00"; // version made by
158. $cdrec .= "x14x00"; // version needed to extract
159. $cdrec .= "x00x00"; // gen purpose bit flag
160. $cdrec .= "x08x00"; // compression method
161. $cdrec .= $hexdtime; // last mod time & date
162. $cdrec .= pack('V', $crc); // crc32
163. $cdrec .= pack('V', $c_len); // compressed filesize
164. $cdrec .= pack('V', $unc_len); // uncompressed filesize
165. $cdrec .= pack('v', strlen($name) ); // length of filename
166. $cdrec .= pack('v', 0 ); // extra field length
167. $cdrec .= pack('v', 0 ); // file comment length
168. $cdrec .= pack('v', 0 ); // disk number start
169. $cdrec .= pack('v', 0 ); // internal file attributes
170. $cdrec .= pack('V', 32 ); // external file attributes - 'archive' bit set
172. $cdrec .= pack('V', $this -> old_offset ); // relative offset of local header
173. $this -> old_offset = $new_offset;
175. $cdrec .= $name;
177. // optional extra field, file comment goes here
178. // save to central directory
179. $this -> ctrl_dir[] = $cdrec;
180. } // end of the 'addFile()' method
183. /**
184. * Dumps out file
185. *
186. * @return string the zipped file
187. *
188. * @access public
189. */
190. function file()
191. {
192. $data = implode('', $this -> datasec);
193. $ctrldir = implode('', $this -> ctrl_dir);
195. return
196. $data .
197. $ctrldir .
198. $this -> eof_ctrl_dir .
199. pack('v', sizeof($this -> ctrl_dir)) . // total # of entries "on this disk"
200. pack('v', sizeof($this -> ctrl_dir)) . // total # of entries overall
201. pack('V', strlen($ctrldir)) . // size of central dir
202. pack('V', strlen($data)) . // offset to start of central dir
203. "x00x00"; // .zip file comment length
204. } // end of the 'file()' method
207. } // end of the 'PHPZip' class
208. ?>
210. //使用方法
212. $z = new PHPZip(); //新建立一个zip的类
214. 方法一：
215. $z -> Zip("", "out1.zip"); //添加当前目录和子目录下的所有档案
218. 方法二：
219. $files=array('1.txt','gb.txt');
220. $files[]='5.txt';
221. $z -> Zip($files, "out2.zip"); //添加文件列表
224. 方法三：
225. $z -> Zip("/usr/local/sext/", "out3.zip"); //添加指定目录
226. ?>

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PHPZip