php打包一组文件为zip压缩包的类

2. /**
3. * Zip file creation class.
4. * Makes zip files.
5. *
6. * @access public
7. */
8. class zipfile
9. {
10. /**
11. * Array to store compressed data
12. *
13. * @public array $datasec
14. */
15. public $datasec = array();
17. /**
18. * Central directory
19. *
20. * @public array $ctrl_dir
21. */
22. public $ctrl_dir = array();
24. /**
25. * End of central directory record
26. *
27. * @public string $eof_ctrl_dir
28. */
29. public $eof_ctrl_dir = "\x50\x4b\x05\x06\x00\x00\x00\x00";
31. /**
32. * Last offset position
33. *
34. * @public integer $old_offset
35. */
36. public $old_offset = 0;
39. /**
40. * Converts an Unix timestamp to a four byte DOS date and time format (date
41. * in high two bytes, time in low two bytes allowing magnitude comparison).
42. *
43. * @param integer the current Unix timestamp
44. *
45. * @return integer the current date in a four byte DOS format
46. *
47. * @access private
48. */
49. function unix2DosTime($unixtime = 0) {
50. $timearray = ($unixtime == 0) ? getdate() : getdate($unixtime);
52. if ($timearray['year'] $timearray['year'] = 1980;
53. $timearray['mon'] = 1;
54. $timearray['mday'] = 1;
55. $timearray['hours'] = 0;
56. $timearray['minutes'] = 0;
57. $timearray['seconds'] = 0;
58. } // end if
60. return (($timearray['year'] - 1980) ($timearray['hours'] > 1);
61. } // end of the 'unix2DosTime()' method
64. /**
65. * Adds "file" to archive
66. *
67. * @param string file contents
68. * @param string name of the file in the archive (may contains the path)
69. * @param integer the current timestamp
70. *
71. * @access public
72. */
73. function addFile($data, $name, $time = 0)
74. {
75. $name = str_replace('\\', '/', $name);
77. $dtime = dechex($this->unix2DosTime($time));
78. $hexdtime = '\x' . $dtime[6] . $dtime[7]
79. . '\x' . $dtime[4] . $dtime[5]
80. . '\x' . $dtime[2] . $dtime[3]
81. . '\x' . $dtime[0] . $dtime[1];
82. eval('$hexdtime = "' . $hexdtime . '";');
84. $fr = "\x50\x4b\x03\x04";
85. $fr .= "\x14\x00"; // ver needed to extract
86. $fr .= "\x00\x00"; // gen purpose bit flag
87. $fr .= "\x08\x00"; // compression method
88. $fr .= $hexdtime; // last mod time and date
90. // "local file header" segment
91. $unc_len = strlen($data);
92. $crc = crc32($data);
93. $zdata = gzcompress($data);
94. $zdata = substr(substr($zdata, 0, strlen($zdata) - 4), 2); // fix crc bug
95. $c_len = strlen($zdata);
96. $fr .= pack('V', $crc); // crc32
97. $fr .= pack('V', $c_len); // compressed filesize
98. $fr .= pack('V', $unc_len); // uncompressed filesize
99. $fr .= pack('v', strlen($name)); // length of filename
100. $fr .= pack('v', 0); // extra field length
101. $fr .= $name;
103. // "file data" segment
104. $fr .= $zdata;
106. // "data descriptor" segment (optional but necessary if archive is not
107. // served as file)
108. $fr .= pack('V', $crc); // crc32
109. $fr .= pack('V', $c_len); // compressed filesize
110. $fr .= pack('V', $unc_len); // uncompressed filesize
112. // add this entry to array
113. $this -> datasec[] = $fr;
115. // now add to central directory record
116. $cdrec = "\x50\x4b\x01\x02";
117. $cdrec .= "\x00\x00"; // version made by
118. $cdrec .= "\x14\x00"; // version needed to extract
119. $cdrec .= "\x00\x00"; // gen purpose bit flag
120. $cdrec .= "\x08\x00"; // compression method
121. $cdrec .= $hexdtime; // last mod time & date
122. $cdrec .= pack('V', $crc); // crc32
123. $cdrec .= pack('V', $c_len); // compressed filesize
124. $cdrec .= pack('V', $unc_len); // uncompressed filesize
125. $cdrec .= pack('v', strlen($name) ); // length of filename
126. $cdrec .= pack('v', 0 ); // extra field length
127. $cdrec .= pack('v', 0 ); // file comment length
128. $cdrec .= pack('v', 0 ); // disk number start
129. $cdrec .= pack('v', 0 ); // internal file attributes
130. $cdrec .= pack('V', 32 ); // external file attributes - 'archive' bit set
132. $cdrec .= pack('V', $this -> old_offset ); // relative offset of local header
133. $this -> old_offset += strlen($fr);
135. $cdrec .= $name;
137. // optional extra field, file comment goes here
138. // save to central directory
139. $this -> ctrl_dir[] = $cdrec;
140. } // end of the 'addFile()' method
143. /**
144. * Dumps out file
145. *
146. * @return string the zipped file
147. *
148. * @access public
149. */
150. function file()
151. {
152. $data = implode('', $this -> datasec);
153. $ctrldir = implode('', $this -> ctrl_dir);
155. return
156. $data .
157. $ctrldir .
158. $this -> eof_ctrl_dir .
159. pack('v', sizeof($this -> ctrl_dir)) . // total # of entries "on this disk"
160. pack('v', sizeof($this -> ctrl_dir)) . // total # of entries overall
161. pack('V', strlen($ctrldir)) . // size of central dir
162. pack('V', strlen($data)) . // offset to start of central dir
163. "\x00\x00"; // .zip file comment length
164. } // end of the 'file()' method
167. /**
168. * A Wrapper of original addFile Function
169. *
170. * Created By Hasin Hayder at 29th Jan, 1:29 AM
171. *
172. * @param array An Array of files with relative/absolute path to be added in Zip File
173. *
174. * @access public
175. */
176. function addFiles($files /*Only Pass Array*/)
177. {
178. foreach($files as $file)
179. {
180. if (is_file($file)) //directory check
181. {
182. $data = implode("",file($file));
183. $this->addFile($data,$file);
184. }
185. }
186. }
188. /**
189. * A Wrapper of original file Function
190. *
191. * Created By Hasin Hayder at 29th Jan, 1:29 AM
192. *
193. * @param string Output file name
194. *
195. * @access public
196. */
197. function output($file)
198. {
199. $fp=fopen($file,"w");
200. fwrite($fp,$this->file());
201. fclose($fp);
202. }
203. } // end of the 'zipfile' class

复制代码