dirTree($dir,$dir); } $zipfilenametemp = time().">
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php压缩文件帮助类

时间：2021-07-01 10:21:17 帮助过：26人阅读

  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 ($filesize < 104857600) {
  35. if($autoDownload){
  36. header("Content-type: application/octet-stream");
  37. header("Content-disposition: attachment; filename=".$zipfilename);
  38. }
  39. echo $this -> filezip();
  40. }else{
  41. echo "create zip error!";
  42. }
  43. unlink($zipfilenametemp);
  44. }
  45. }
  46. //get dir tree..
  47. function dirTree($directory,$rootDir){
  48. global $_SERVER,$dirInfo,$rootDir;
  49. $fileDir=$rootDir;
  50. $myDir=dir($directory);
  51. while($file=$myDir->read()){
  54. if(is_dir("$directory/$file") and $file!="." and $file!=".."){
  55. $dirInfo[0]++;
  56. $rootDir ="$fileDir$file/";
  57. $this -> addFile('', "$rootDir");
  58. //go on n's folders
  59. $this->dirTree("$directory/$file",$rootDir);
  60. }else{
  61. if($file!="." and $file!=".."){
  62. $dirInfo[1]++;
  63. //$fd = fopen ("$directory/$file", "r");
  64. $fileValue = file_get_contents("$directory/$file");
  65. //fclose ($fd);
  66. $this -> addFile($fileValue, "$fileDir$file");
  67. }
  68. }
  69. }
  70. $myDir->close();
  71. }
  72. function unix2DosTime($unixtime = 0) {
  73. $timearray = ($unixtime == 0) ? getdate() : getdate($unixtime);
  74. if ($timearray['year'] < 1980) {
  75. $timearray['year'] = 1980;
  76. $timearray['mon'] = 1;
  77. $timearray['mday'] = 1;
  78. $timearray['hours'] = 0;
  79. $timearray['minutes'] = 0;
  80. $timearray['seconds'] = 0;
  83. } // end if
  84. return (($timearray['year'] - 1980) << 25) | ($timearray['mon'] << 21) | ($timearray['mday'] << 16) |
  85. ($timearray['hours'] << 11) | ($timearray['minutes'] << 5) | ($timearray['seconds'] >> 1);
  86. }
  87. function addFile($data, $name, $time = 0){
  88. $name = str_replace('//', '/', $name);
  89. $dtime = dechex($this->unix2DosTime($time));
  90. $hexdtime = '/x' . $dtime[6] . $dtime[7]
  91. . '/x' . $dtime[4] . $dtime[5]
  92. . '/x' . $dtime[2] . $dtime[3]
  93. . '/x' . $dtime[0] . $dtime[1];
  94. eval('$hexdtime = "' . $hexdtime . '";');
  95. $fr = "/x50/x4b/x03/x04";
  96. $fr .= "/x14/x00"; // ver needed to extract
  97. $fr .= "/x00/x00"; // gen purpose bit flag
  98. $fr .= "/x08/x00"; // compression method
  99. $fr .= $hexdtime; // last mod time and date
  100. // "local file header" segment
  101. $unc_len = strlen($data);
  102. $crc = crc32($data);
  103. $zdata = gzcompress($data);
  106. $c_len = strlen($zdata);
  107. $zdata = substr(substr($zdata, 0, strlen($zdata) - 4), 2); // fix crc bug
  108. $fr .= pack('V', $crc); // crc32
  109. $fr .= pack('V', $c_len); // compressed filesize
  110. $fr .= pack('V', $unc_len); // uncompressed filesize
  111. $fr .= pack('v', strlen($name)); // length of filename
  112. $fr .= pack('v', 0); // extra field length
  113. $fr .= $name;
  114. // "file data" segment
  115. $fr .= $zdata;
  116. // "data descriptor" segment (optional but necessary if archive is not
  117. // served as file)
  118. $fr .= pack('V', $crc); // crc32
  119. $fr .= pack('V', $c_len); // compressed filesize
  120. $fr .= pack('V', $unc_len); // uncompressed filesize
  121. // add this entry to array
  122. $this -> datasec[] = $fr;
  123. $new_offset = strlen(implode('', $this->datasec));
  124. // now add to central directory record
  125. $cdrec = "/x50/x4b/x01/x02";
  126. $cdrec .= "/x00/x00"; // version made by
  127. $cdrec .= "/x14/x00"; // version needed to extract
  130. $cdrec .= "/x00/x00"; // gen purpose bit flag
  131. $cdrec .= "/x08/x00"; // compression method
  132. $cdrec .= $hexdtime; // last mod time & date
  133. $cdrec .= pack('V', $crc); // crc32
  134. $cdrec .= pack('V', $c_len); // compressed filesize
  135. $cdrec .= pack('V', $unc_len); // uncompressed filesize
  136. $cdrec .= pack('v', strlen($name) ); // length of filename
  137. $cdrec .= pack('v', 0 ); // extra field length
  138. $cdrec .= pack('v', 0 ); // file comment length
  139. $cdrec .= pack('v', 0 ); // disk number start
  140. $cdrec .= pack('v', 0 ); // internal file attributes
  141. $cdrec .= pack('V', 32 ); // external file attributes - 'archive' bit set
  142. $cdrec .= pack('V', $this -> old_offset ); // relative offset of local header
  143. $this -> old_offset = $new_offset;
  144. $cdrec .= $name;
  145. // optional extra field, file comment goes here
  146. // save to central directory
  147. $this -> ctrl_dir[] = $cdrec;
  148. }
  149. function filezip(){
  150. $data = implode('', $this -> datasec);
  151. $ctrldir = implode('', $this -> ctrl_dir);
  152. return
  153. $data .
  154. $ctrldir .
  155. $this -> eof_ctrl_dir .
  156. pack('v', sizeof($this -> ctrl_dir)) . // total # of entries "on this disk"
  157. pack('v', sizeof($this -> ctrl_dir)) . // total # of entries overall
  158. pack('V', strlen($ctrldir)) . // size of central dir
  159. pack('V', strlen($data)) . // offset to start of central dir
  160. "/x00/x00"; // .zip file comment length
  161. }
  162. }
  163. ?>
  167. 还有另外一个比较简单的
  169. [php] view plaincopy
  172. class createzip
  173. {
  174. /* @creates a compressed zip file 将多个文件压缩成一个zip文件的函数
  175. * @$files 数组类型 实例array("1.jpg","2.jpg");
  176. * @destination 目标文件的路径 如"c:/androidyue.zip"
  177. * @$overwrite 是否为覆盖与目标文件相同的文件
  178. * @Recorded By Androidyue
  179. * @Blog:http://thinkblog.sinaapp.com
  180. */
  181. function create_zip($files = array(),$destination = '',$overwrite = false)
  182. {
  183. //如果zip文件已经存在并且设置为不重写返回false
  184. if(file_exists($destination) && !$overwrite) { return false; }
  185. $valid_files = array();
  186. //if files were passed in...
  187. //获取到真实有效的文件名
  188. if(is_array($files)) {
  189. //cycle through each file
  190. foreach($files as $file) {
  191. //make sure the file exists
  192. if(file_exists($file)) {
  193. $valid_files[] = $file;
  194. }
  195. }
  196. }
  197. //如果存在真实有效的文件
  198. if(count($valid_files))
  199. {
  200. //create the archive
  201. $zip = new ZipArchive();
  202. //打开文件 如果文件已经存在则覆盖，如果没有则创建
  203. if($zip->open($destination,$overwrite ? ZIPARCHIVE::OVERWRITE : ZIPARCHIVE::CREATE) !== true) {
  204. return false;
  205. }
  206. //向压缩文件中添加文件
  207. foreach($valid_files as $file) {
  208. $zip->addFile($file,$file);
  209. }
  210. //关闭文件
  211. $zip->close();
  212. //检测文件是否存在
  213. return file_exists($destination);
  214. }
  215. else{
  216. //如果没有真实有效的文件返回false
  217. return false;
  218. }
  219. }
  221. }
  222. /****
  223. //测试函数
  224. $files=array('temp.php','test.php');
  225. create_zip($files, 'myzipfile.zip', true);
  226. ****/
  227. ?>

压缩文件, php

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