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php压缩文件帮助类

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  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");
  20. $fileValue = fread ($fd, filesize ($filename));
  21. fclose ($fd);
  22. if (is_array($dir)) $filename = basename($dir);
  23. $this -> addFile($fileValue, "$filename");
  24. }else{
  25. $this->dirTree($dir,$dir);
  26. }
  27. $zipfilenametemp = time().$zipfilename;
  28. $out = $this -> filezip();
  29. $fp = fopen($zipfilenametemp, "w");
  30. fwrite($fp, $out, strlen($out));
  31. fclose($fp);
  32. $filesize = filesize($zipfilenametemp);
  33. if ($filesize if($autoDownload){
  34. header("Content-type: application/octet-stream");
  35. header("Content-disposition: attachment; filename=".$zipfilename);
  36. }
  37. echo $this -> filezip();
  38. }else{
  39. echo "create zip error!";
  40. }
  41. unlink($zipfilenametemp);
  42. }
  43. }
  44. //get dir tree..
  45. function dirTree($directory,$rootDir){
  46. global $_SERVER,$dirInfo,$rootDir;
  47. $fileDir=$rootDir;
  48. $myDir=dir($directory);
  49. while($file=$myDir->read()){
  50. if(is_dir("$directory/$file") and $file!="." and $file!=".."){
  51. $dirInfo[0]++;
  52. $rootDir ="$fileDir$file/";
  53. $this -> addFile('', "$rootDir");
  54. //go on n's folders
  55. $this->dirTree("$directory/$file",$rootDir);
  56. }else{
  57. if($file!="." and $file!=".."){
  58. $dirInfo[1]++;
  59. //$fd = fopen ("$directory/$file", "r");
  60. $fileValue = file_get_contents("$directory/$file");
  61. //fclose ($fd);
  62. $this -> addFile($fileValue, "$fileDir$file");
  63. }
  64. }
  65. }
  66. $myDir->close();
  67. }
  68. function unix2DosTime($unixtime = 0) {
  69. $timearray = ($unixtime == 0) ? getdate() : getdate($unixtime);
  70. if ($timearray['year'] $timearray['year'] = 1980;
  71. $timearray['mon'] = 1;
  72. $timearray['mday'] = 1;
  73. $timearray['hours'] = 0;
  74. $timearray['minutes'] = 0;
  75. $timearray['seconds'] = 0;
  76. } // end if
  77. return (($timearray['year'] - 1980) ($timearray['hours'] > 1);
  78. }
  79. function addFile($data, $name, $time = 0){
  80. $name = str_replace('//', '/', $name);
  81. $dtime = dechex($this->unix2DosTime($time));
  82. $hexdtime = '/x' . $dtime[6] . $dtime[7]
  83. . '/x' . $dtime[4] . $dtime[5]
  84. . '/x' . $dtime[2] . $dtime[3]
  85. . '/x' . $dtime[0] . $dtime[1];
  86. eval('$hexdtime = "' . $hexdtime . '";');
  87. $fr = "/x50/x4b/x03/x04";
  88. $fr .= "/x14/x00"; // ver needed to extract
  89. $fr .= "/x00/x00"; // gen purpose bit flag
  90. $fr .= "/x08/x00"; // compression method
  91. $fr .= $hexdtime; // last mod time and date
  92. // "local file header" segment
  93. $unc_len = strlen($data);
  94. $crc = crc32($data);
  95. $zdata = gzcompress($data);
  96. $c_len = strlen($zdata);
  97. $zdata = substr(substr($zdata, 0, strlen($zdata) - 4), 2); // fix crc bug
  98. $fr .= pack('V', $crc); // crc32
  99. $fr .= pack('V', $c_len); // compressed filesize
  100. $fr .= pack('V', $unc_len); // uncompressed filesize
  101. $fr .= pack('v', strlen($name)); // length of filename
  102. $fr .= pack('v', 0); // extra field length
  103. $fr .= $name;
  104. // "file data" segment
  105. $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
  111. // add this entry to array
  112. $this -> datasec[] = $fr;
  113. $new_offset = strlen(implode('', $this->datasec));
  114. // now add to central directory record
  115. $cdrec = "/x50/x4b/x01/x02";
  116. $cdrec .= "/x00/x00"; // version made by
  117. $cdrec .= "/x14/x00"; // version needed to extract
  118. $cdrec .= "/x00/x00"; // gen purpose bit flag
  119. $cdrec .= "/x08/x00"; // compression method
  120. $cdrec .= $hexdtime; // last mod time & date
  121. $cdrec .= pack('V', $crc); // crc32
  122. $cdrec .= pack('V', $c_len); // compressed filesize
  123. $cdrec .= pack('V', $unc_len); // uncompressed filesize
  124. $cdrec .= pack('v', strlen($name) ); // length of filename
  125. $cdrec .= pack('v', 0 ); // extra field length
  126. $cdrec .= pack('v', 0 ); // file comment length
  127. $cdrec .= pack('v', 0 ); // disk number start
  128. $cdrec .= pack('v', 0 ); // internal file attributes
  129. $cdrec .= pack('V', 32 ); // external file attributes - 'archive' bit set
  130. $cdrec .= pack('V', $this -> old_offset ); // relative offset of local header
  131. $this -> old_offset = $new_offset;
  132. $cdrec .= $name;
  133. // optional extra field, file comment goes here
  134. // save to central directory
  135. $this -> ctrl_dir[] = $cdrec;
  136. }
  137. function filezip(){
  138. $data = implode('', $this -> datasec);
  139. $ctrldir = implode('', $this -> ctrl_dir);
  140. return
  141. $data .
  142. $ctrldir .
  143. $this -> eof_ctrl_dir .
  144. pack('v', sizeof($this -> ctrl_dir)) . // total # of entries "on this disk"
  145. pack('v', sizeof($this -> ctrl_dir)) . // total # of entries overall
  146. pack('V', strlen($ctrldir)) . // size of central dir
  147. pack('V', strlen($data)) . // offset to start of central dir
  148. "/x00/x00"; // .zip file comment length
  149. }
  150. }
  151. ?>
  152. 还有另外一个比较简单的
  153. [php] view plaincopy
  154. class createzip
  155. {
  156. /* @creates a compressed zip file 将多个文件压缩成一个zip文件的函数
  157. * @$files 数组类型 实例array("1.jpg","2.jpg");
  158. * @destination 目标文件的路径 如"c:/androidyue.zip"
  159. * @$overwrite 是否为覆盖与目标文件相同的文件
  160. * @Recorded By Androidyue
  161. * @Blog:http://thinkblog.sinaapp.com
  162. */
  163. function create_zip($files = array(),$destination = '',$overwrite = false)
  164. {
  165. //如果zip文件已经存在并且设置为不重写返回false
  166. if(file_exists($destination) && !$overwrite) { return false; }
  167. $valid_files = array();
  168. //if files were passed in...
  169. //获取到真实有效的文件名
  170. if(is_array($files)) {
  171. //cycle through each file
  172. foreach($files as $file) {
  173. //make sure the file exists
  174. if(file_exists($file)) {
  175. $valid_files[] = $file;
  176. }
  177. }
  178. }
  179. //如果存在真实有效的文件
  180. if(count($valid_files))
  181. {
  182. //create the archive
  183. $zip = new ZipArchive();
  184. //打开文件 如果文件已经存在则覆盖,如果没有则创建
  185. if($zip->open($destination,$overwrite ? ZIPARCHIVE::OVERWRITE : ZIPARCHIVE::CREATE) !== true) {
  186. return false;
  187. }
  188. //向压缩文件中添加文件
  189. foreach($valid_files as $file) {
  190. $zip->addFile($file,$file);
  191. }
  192. //关闭文件
  193. $zip->close();
  194. //检测文件是否存在
  195. return file_exists($destination);
  196. }
  197. else{
  198. //如果没有真实有效的文件返回false
  199. return false;
  200. }
  201. }
  202. }
  203. /****
  204. //测试函数
  205. $files=array('temp.php','test.php');
  206. create_zip($files, 'myzipfile.zip', true);
  207. ****/
  208. ?>
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压缩文件, php


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