phpZIP压缩类实例分享

功能：将文件压缩成zip，或者rar的压缩包。后缀名可以自定义。 使用方法：首先实例化，然后传参。两个参数。 第一个关于文件地址的一个Array。 第二个是要保存的压缩包文件的绝对地址。

php zip压缩类的调用方法：

2. $zipfiles =array("/root/pooy/test1.txt","/root/pooy/test2.txt");
3. $z = new PHPZip();
4. //$randomstr = random(8);
5. $zipfile = TEMP."/photocome_".$groupid.".zip";
6. $z->Zip($zipfiles, $zipfile); //添加文件列表

PHP的ZIP压缩类：

3. #

4. # PHPZip v1.2 by Sext (sext@neud.net) 2002-11-18
5. # (Changed: 2003-03-01)
6. #
7. # Makes zip archive
8. #
9. # Based on "Zip file creation class", uses zLib
10. #
11. #
12. class PHPZip
13. {
14. function Zip($dir, $zipfilename)
15. {
16. if (@function_exists('gzcompress'))
17. {
18. $curdir = getcwd();
19. if (is_array($dir))
20. {
21. $filelist = $dir;
22. }
23. else
24. {
25. $filelist = $this -> GetFileList($dir);
26. }

27. if ((!empty($dir))&&(!is_array($dir))&&(file_exists($dir))) chdir($dir);

28. else chdir($curdir);

29. if (count($filelist)>0)

30. {
31. foreach($filelist as $filename)
32. {
33. if (is_file($filename))
34. {
35. $fd = fopen ($filename, "r");
36. $content = fread ($fd, filesize ($filename));
37. fclose ($fd);

38. if (is_array($dir)) $filename = basename($filename);

39. $this -> addFile($content, $filename);
40. }
41. }
42. $out = $this -> file();

43. chdir($curdir);

44. $fp = fopen($zipfilename, "w");
45. fwrite($fp, $out, strlen($out));
46. fclose($fp);
47. }
48. return 1;
49. }
50. else return 0;
51. }

52. function GetFileList($dir)

53. {
54. if (file_exists($dir))
55. {
56. $args = func_get_args();
57. $pref = $args[1];

58. $dh = opendir($dir);

59. while($files = readdir($dh))
60. {
61. if (($files!=".")&&($files!=".."))
62. {
63. if (is_dir($dir.$files))
64. {
65. $curdir = getcwd();
66. chdir($dir.$files);
67. $file = array_merge($file, $this -> GetFileList("", "$pref$files/"));
68. chdir($curdir);
69. }
70. else $file[]=$pref.$files;
71. }
72. }
73. closedir($dh);
74. }
75. return $file;
76. }

77. var $datasec = array();

78. var $ctrl_dir = array();
79. var $eof_ctrl_dir = "\x50\x4b\x05\x06\x00\x00\x00\x00";
80. var $old_offset = 0;

81. /**

82. * Converts an Unix timestamp to a four byte DOS date and time format (date
83. * in high two bytes, time in low two bytes allowing magnitude comparison).
84. *
85. * @param integer the current Unix timestamp
86. *
87. * @return integer the current date in a four byte DOS format
88. *
89. * @access private
90. */
91. function unix2DosTime($unixtime = 0) {
92. $timearray = ($unixtime == 0) ? getdate() : getdate($unixtime);

93. if ($timearray['year'] < 1980) {

94. $timearray['year'] = 1980;
95. $timearray['mon'] = 1;
96. $timearray['mday'] = 1;
97. $timearray['hours'] = 0;
98. $timearray['minutes'] = 0;
99. $timearray['seconds'] = 0;
100. } // end if

101. return (($timearray['year'] - 1980) << 25) | ($timearray['mon'] << 21) | ($timearray['mday'] << 16) |

102. ($timearray['hours'] << 11) | ($timearray['minutes'] << 5) | ($timearray['seconds'] >> 1);
103. } // end of the 'unix2DosTime()' method

104. /**

105. * Adds "file" to archive
106. *
107. * @param string file contents
108. * @param string name of the file in the archive (may contains the path)
109. * @param integer the current timestamp
110. *
111. * @access public
112. */
113. function addFile($data, $name, $time = 0)
114. {
115. $name = str_replace('\\', '/', $name);

116. $dtime = dechex($this->unix2DosTime($time));

117. $hexdtime = '\x' . $dtime[6] . $dtime[7]
118. Western union point . '\x' . $dtime[4] . $dtime[5]
119. . '\x' . $dtime[2] . $dtime[3]
120. . '\x' . $dtime[0] . $dtime[1];
121. eval('$hexdtime = "' . $hexdtime . '";');

122. $fr = "\x50\x4b\x03\x04";

123. $fr .= "\x14\x00"; // ver needed to extract
124. $fr .= "\x00\x00"; // gen purpose bit flag
125. $fr .= "\x08\x00"; // compression method
126. $fr .= $hexdtime; // last mod time and date

127. // "local file header" segment

128. $unc_len = strlen($data);
129. $crc = crc32($data);
130. $zdata = gzcompress($data);
131. $c_len = strlen($zdata);
132. $zdata = substr(substr($zdata, 0, strlen($zdata) - 4), 2); // fix crc bug
133. $fr .= pack('V', $crc); // crc32
134. $fr .= pack('V', $c_len); // compressed filesize
135. $fr .= pack('V', $unc_len); // uncompressed filesize
136. $fr .= pack('v', strlen($name)); // length of filename
137. $fr .= pack('v', 0); // extra field length
138. $fr .= $name;

139. // "file data" segment

140. $fr .= $zdata;

141. // "data descriptor" segment (optional but necessary if archive is not

142. // served as file)
143. $fr .= pack('V', $crc); // crc32
144. $fr .= pack('V', $c_len); // compressed filesize
145. $fr .= pack('V', $unc_len); // uncompressed filesize

146. // add this entry to array

147. $this -> datasec[] = $fr;
148. $new_offset = strlen(implode('', $this->datasec));

149. // now add to central directory record

150. $cdrec = "\x50\x4b\x01\x02";
151. $cdrec .= "\x00\x00"; // version made by
152. $cdrec .= "\x14\x00"; // version needed to extract
153. $cdrec .= "\x00\x00"; // gen purpose bit flag
154. $cdrec .= "\x08\x00"; // compression method
155. $cdrec .= $hexdtime; // last mod time & date
156. $cdrec .= pack('V', $crc); // crc32
157. $cdrec .= pack('V', $c_len); // compressed filesize
158. $cdrec .= pack('V', $unc_len); // uncompressed filesize
159. $cdrec .= pack('v', strlen($name) ); // length of filename
160. $cdrec .= pack('v', 0 ); // extra field length
161. $cdrec .= pack('v', 0 ); // file comment length
162. $cdrec .= pack('v', 0 ); // disk number start
163. $cdrec .= pack('v', 0 ); // internal file attributes
164. $cdrec .= pack('V', 32 ); // external file attributes - 'archive' bit set

165. $cdrec .= pack('V', $this -> old_offset ); // relative offset of local header

166. $this -> old_offset = $new_offset;

167. $cdrec .= $name;

168. // optional extra field, file comment goes here

169. // save to central directory
170. $this -> ctrl_dir[] = $cdrec;
171. } // end of the 'addFile()' method

172. /**

173. * Dumps out file
174. *
175. * @return string the zipped file
176. *
177. * @access public
178. */
179. function file()
180. {
181. $data = implode('', $this -> datasec);
182. $ctrldir = implode('', $this -> ctrl_dir);

183. return

184. $data .
185. $ctrldir .
186. $this -> eof_ctrl_dir .
187. pack('v', sizeof($this -> ctrl_dir)) . // total # of entries "on this disk"
188. pack('v', sizeof($this -> ctrl_dir)) . // total # of entries overall
189. pack('V', strlen($ctrldir)) . // size of central dir
190. pack('V', strlen($data)) . // offset to start of central dir
191. "\x00\x00"; // .zip file comment length
192. } // end of the 'file()' method

193. } // end of the 'PHPZip' class

194. ?>

老外实现的php zip压缩类，个人感觉还是不错的，里面有大量php实用函数的应用技巧，特别是函数pack、crc32、gzcompress等函数的应用，值得学习借鉴。