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php压缩文件帮助类

程序员文章站 2022-04-24 23:44:28
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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");
  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
相关标签： php压缩文件帮助类

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