php压缩文件帮助类

1. /*
2. File name: /include/zip.php
3. Author: Horace 2009/04/15
4. */
5. class PHPZip{
6. var $dirInfo = array("0","0");
7. var $rootDir = '';
8. var $datasec = array();
9. var $ctrl_dir = array();
10. var $eof_ctrl_dir = "/x50/x4b/x05/x06/x00/x00/x00/x00";
11. var $old_offset = 0;
12. function downloadZip(){
13. createZip($dir, $zipfilename, true);
14. }
15. function createZip($dir, $zipfilename, $autoDownload = false){
16. if (@function_exists('gzcompress')){
17. @set_time_limit("0");
18. if (is_array($dir)){
19. $fd = fopen ($dir, "r");
21. $fileValue = fread ($fd, filesize ($filename));
22. fclose ($fd);
23. if (is_array($dir)) $filename = basename($dir);
24. $this -> addFile($fileValue, "$filename");
25. }else{
26. $this->dirTree($dir,$dir);
27. }
28. $zipfilenametemp = time().$zipfilename;
29. $out = $this -> filezip();
30. $fp = fopen($zipfilenametemp, "w");
31. fwrite($fp, $out, strlen($out));
32. fclose($fp);
33. $filesize = filesize($zipfilenametemp);
34. if ($filesize if($autoDownload){
35. header("Content-type: application/octet-stream");
36. header("Content-disposition: attachment; filename=".$zipfilename);
37. }
38. echo $this -> filezip();
39. }else{
40. echo "create zip error!";
41. }
42. unlink($zipfilenametemp);
43. }
44. }
45. //get dir tree..
46. function dirTree($directory,$rootDir){
47. global $_SERVER,$dirInfo,$rootDir;
48. $fileDir=$rootDir;
49. $myDir=dir($directory);
50. while($file=$myDir->read()){
53. if(is_dir("$directory/$file") and $file!="." and $file!=".."){
54. $dirInfo[0]++;
55. $rootDir ="$fileDir$file/";
56. $this -> addFile('', "$rootDir");
57. //go on n's folders
58. $this->dirTree("$directory/$file",$rootDir);
59. }else{
60. if($file!="." and $file!=".."){
61. $dirInfo[1]++;
62. //$fd = fopen ("$directory/$file", "r");
63. $fileValue = file_get_contents("$directory/$file");
64. //fclose ($fd);
65. $this -> addFile($fileValue, "$fileDir$file");
66. }
67. }
68. }
69. $myDir->close();
70. }
71. function unix2DosTime($unixtime = 0) {
72. $timearray = ($unixtime == 0) ? getdate() : getdate($unixtime);
73. if ($timearray['year'] $timearray['year'] = 1980;
74. $timearray['mon'] = 1;
75. $timearray['mday'] = 1;
76. $timearray['hours'] = 0;
77. $timearray['minutes'] = 0;
78. $timearray['seconds'] = 0;
81. } // end if
82. return (($timearray['year'] - 1980) ($timearray['hours'] > 1);
83. }
84. function addFile($data, $name, $time = 0){
85. $name = str_replace('//', '/', $name);
86. $dtime = dechex($this->unix2DosTime($time));
87. $hexdtime = '/x' . $dtime[6] . $dtime[7]
88. . '/x' . $dtime[4] . $dtime[5]
89. . '/x' . $dtime[2] . $dtime[3]
90. . '/x' . $dtime[0] . $dtime[1];
91. eval('$hexdtime = "' . $hexdtime . '";');
92. $fr = "/x50/x4b/x03/x04";
93. $fr .= "/x14/x00"; // ver needed to extract
94. $fr .= "/x00/x00"; // gen purpose bit flag
95. $fr .= "/x08/x00"; // compression method
96. $fr .= $hexdtime; // last mod time and date
97. // "local file header" segment
98. $unc_len = strlen($data);
99. $crc = crc32($data);
100. $zdata = gzcompress($data);
103. $c_len = strlen($zdata);
104. $zdata = substr(substr($zdata, 0, strlen($zdata) - 4), 2); // fix crc bug
105. $fr .= pack('V', $crc); // crc32
106. $fr .= pack('V', $c_len); // compressed filesize
107. $fr .= pack('V', $unc_len); // uncompressed filesize
108. $fr .= pack('v', strlen($name)); // length of filename
109. $fr .= pack('v', 0); // extra field length
110. $fr .= $name;
111. // "file data" segment
112. $fr .= $zdata;
113. // "data descriptor" segment (optional but necessary if archive is not
114. // served as file)
115. $fr .= pack('V', $crc); // crc32
116. $fr .= pack('V', $c_len); // compressed filesize
117. $fr .= pack('V', $unc_len); // uncompressed filesize
118. // add this entry to array
119. $this -> datasec[] = $fr;
120. $new_offset = strlen(implode('', $this->datasec));
121. // now add to central directory record
122. $cdrec = "/x50/x4b/x01/x02";
123. $cdrec .= "/x00/x00"; // version made by
124. $cdrec .= "/x14/x00"; // version needed to extract
127. $cdrec .= "/x00/x00"; // gen purpose bit flag
128. $cdrec .= "/x08/x00"; // compression method
129. $cdrec .= $hexdtime; // last mod time & date
130. $cdrec .= pack('V', $crc); // crc32
131. $cdrec .= pack('V', $c_len); // compressed filesize
132. $cdrec .= pack('V', $unc_len); // uncompressed filesize
133. $cdrec .= pack('v', strlen($name) ); // length of filename
134. $cdrec .= pack('v', 0 ); // extra field length
135. $cdrec .= pack('v', 0 ); // file comment length
136. $cdrec .= pack('v', 0 ); // disk number start
137. $cdrec .= pack('v', 0 ); // internal file attributes
138. $cdrec .= pack('V', 32 ); // external file attributes - 'archive' bit set
139. $cdrec .= pack('V', $this -> old_offset ); // relative offset of local header
140. $this -> old_offset = $new_offset;
141. $cdrec .= $name;
142. // optional extra field, file comment goes here
143. // save to central directory
144. $this -> ctrl_dir[] = $cdrec;
145. }
146. function filezip(){
147. $data = implode('', $this -> datasec);
148. $ctrldir = implode('', $this -> ctrl_dir);
149. return
150. $data .
151. $ctrldir .
152. $this -> eof_ctrl_dir .
153. pack('v', sizeof($this -> ctrl_dir)) . // total # of entries "on this disk"
154. pack('v', sizeof($this -> ctrl_dir)) . // total # of entries overall
155. pack('V', strlen($ctrldir)) . // size of central dir
156. pack('V', strlen($data)) . // offset to start of central dir
157. "/x00/x00"; // .zip file comment length
158. }
159. }
160. ?>
164. 还有另外一个比较简单的
166. [php] view plaincopy
169. class createzip
170. {
171. /* @creates a compressed zip file 将多个文件压缩成一个zip文件的函数
172. * @$files 数组类型 实例array("1.jpg","2.jpg");
173. * @destination 目标文件的路径 如"c:/androidyue.zip"
174. * @$overwrite 是否为覆盖与目标文件相同的文件
175. * @Recorded By Androidyue
176. * @Blog:http://thinkblog.sinaapp.com
177. */
178. function create_zip($files = array(),$destination = '',$overwrite = false)
179. {
180. //如果zip文件已经存在并且设置为不重写返回false
181. if(file_exists($destination) && !$overwrite) { return false; }
182. $valid_files = array();
183. //if files were passed in...
184. //获取到真实有效的文件名
185. if(is_array($files)) {
186. //cycle through each file
187. foreach($files as $file) {
188. //make sure the file exists
189. if(file_exists($file)) {
190. $valid_files[] = $file;
191. }
192. }
193. }
194. //如果存在真实有效的文件
195. if(count($valid_files))
196. {
197. //create the archive
198. $zip = new ZipArchive();
199. //打开文件 如果文件已经存在则覆盖，如果没有则创建
200. if($zip->open($destination,$overwrite ? ZIPARCHIVE::OVERWRITE : ZIPARCHIVE::CREATE) !== true) {
201. return false;
202. }
203. //向压缩文件中添加文件
204. foreach($valid_files as $file) {
205. $zip->addFile($file,$file);
206. }
207. //关闭文件
208. $zip->close();
209. //检测文件是否存在
210. return file_exists($destination);
211. }
212. else{
213. //如果没有真实有效的文件返回false
214. return false;
215. }
216. }
218. }
219. /****
220. //测试函数
221. $files=array('temp.php','test.php');
222. create_zip($files, 'myzipfile.zip', true);
223. ****/
224. ?>

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压缩文件, php