recherche

Maison >développement back-end >tutoriel php >php ZIP压缩类实例分享

php ZIP压缩类实例分享

WBOY
WBOYoriginal
2016-07-25 09:13:07835parcourir

功能：将文件压缩成zip，或者rar的压缩包。后缀名可以自定义。 使用方法：首先实例化，然后传参。两个参数。 第一个关于文件地址的一个Array。 第二个是要保存的压缩包文件的绝对地址。

php zip压缩类的调用方法：

  2. $zipfiles =array("/root/pooy/test1.txt","/root/pooy/test2.txt");
  3. $z = new PHPZip();
  4. //$randomstr = random(8);
  5. $zipfile = TEMP."/photocome_".$groupid.".zip";
  6. $z->Zip($zipfiles, $zipfile); //添加文件列表
复制代码

PHP的ZIP压缩类：

  3. #

  4. # PHPZip v1.2 by Sext (sext@neud.net) 2002-11-18
  5. # (Changed: 2003-03-01)
  6. #
  7. # Makes zip archive
  8. #
  9. # Based on "Zip file creation class", uses zLib
  10. #
  11. #
  12. class PHPZip
  13. {
  14. function Zip($dir, $zipfilename)
  15. {
  16. if (@function_exists('gzcompress'))
  17. {
  18. $curdir = getcwd();
  19. if (is_array($dir))
  20. {
  21. $filelist = $dir;
  22. }
  23. else
  24. {
  25. $filelist = $this -> GetFileList($dir);
  26. }

  27. if ((!empty($dir))&&(!is_array($dir))&&(file_exists($dir))) chdir($dir);

  28. else chdir($curdir);

  29. if (count($filelist)>0)

  30. {
  31. foreach($filelist as $filename)
  32. {
  33. if (is_file($filename))
  34. {
  35. $fd = fopen ($filename, "r");
  36. $content = fread ($fd, filesize ($filename));
  37. fclose ($fd);

  38. if (is_array($dir)) $filename = basename($filename);

  39. $this -> addFile($content, $filename);
  40. }
  41. }
  42. $out = $this -> file();

  43. chdir($curdir);

  44. $fp = fopen($zipfilename, "w");
  45. fwrite($fp, $out, strlen($out));
  46. fclose($fp);
  47. }
  48. return 1;
  49. }
  50. else return 0;
  51. }

  52. function GetFileList($dir)

  53. {
  54. if (file_exists($dir))
  55. {
  56. $args = func_get_args();
  57. $pref = $args[1];

  58. $dh = opendir($dir);

  59. while($files = readdir($dh))
  60. {
  61. if (($files!=".")&&($files!=".."))
  62. {
  63. if (is_dir($dir.$files))
  64. {
  65. $curdir = getcwd();
  66. chdir($dir.$files);
  67. $file = array_merge($file, $this -> GetFileList("", "$pref$files/"));
  68. chdir($curdir);
  69. }
  70. else $file[]=$pref.$files;
  71. }
  72. }
  73. closedir($dh);
  74. }
  75. return $file;
  76. }

  77. var $datasec = array();

  78. var $ctrl_dir = array();
  79. var $eof_ctrl_dir = "\x50\x4b\x05\x06\x00\x00\x00\x00";
  80. var $old_offset = 0;

  81. /**

  82. * Converts an Unix timestamp to a four byte DOS date and time format (date
  83. * in high two bytes, time in low two bytes allowing magnitude comparison).
  84. *
  85. * @param integer the current Unix timestamp
  86. *
  87. * @return integer the current date in a four byte DOS format
  88. *
  89. * @access private
  90. */
  91. function unix2DosTime($unixtime = 0) {
  92. $timearray = ($unixtime == 0) ? getdate() : getdate($unixtime);

  93. if ($timearray['year'] $timearray['year'] = 1980;

  94. $timearray['mon'] = 1;
  95. $timearray['mday'] = 1;
  96. $timearray['hours'] = 0;
  97. $timearray['minutes'] = 0;
  98. $timearray['seconds'] = 0;
  99. } // end if

  100. return (($timearray['year'] - 1980) ($timearray['hours'] > 1);

  101. } // end of the 'unix2DosTime()' method

  102. /**

  103. * Adds "file" to archive
  104. *
  105. * @param string file contents
  106. * @param string name of the file in the archive (may contains the path)
  107. * @param integer the current timestamp
  108. *
  109. * @access public
  110. */
  111. function addFile($data, $name, $time = 0)
  112. {
  113. $name = str_replace('\\', '/', $name);

  114. $dtime = dechex($this->unix2DosTime($time));

  115. $hexdtime = '\x' . $dtime[6] . $dtime[7]
  116. Western union point . '\x' . $dtime[4] . $dtime[5]
  117. . '\x' . $dtime[2] . $dtime[3]
  118. . '\x' . $dtime[0] . $dtime[1];
  119. eval('$hexdtime = "' . $hexdtime . '";');

  120. $fr = "\x50\x4b\x03\x04";

  121. $fr .= "\x14\x00"; // ver needed to extract
  122. $fr .= "\x00\x00"; // gen purpose bit flag
  123. $fr .= "\x08\x00"; // compression method
  124. $fr .= $hexdtime; // last mod time and date

  125. // "local file header" segment

  126. $unc_len = strlen($data);
  127. $crc = crc32($data);
  128. $zdata = gzcompress($data);
  129. $c_len = strlen($zdata);
  130. $zdata = substr(substr($zdata, 0, strlen($zdata) - 4), 2); // fix crc bug
  131. $fr .= pack('V', $crc); // crc32
  132. $fr .= pack('V', $c_len); // compressed filesize
  133. $fr .= pack('V', $unc_len); // uncompressed filesize
  134. $fr .= pack('v', strlen($name)); // length of filename
  135. $fr .= pack('v', 0); // extra field length
  136. $fr .= $name;

  137. // "file data" segment

  138. $fr .= $zdata;

  139. // "data descriptor" segment (optional but necessary if archive is not

  140. // served as file)
  141. $fr .= pack('V', $crc); // crc32
  142. $fr .= pack('V', $c_len); // compressed filesize
  143. $fr .= pack('V', $unc_len); // uncompressed filesize

  144. // add this entry to array

  145. $this -> datasec[] = $fr;
  146. $new_offset = strlen(implode('', $this->datasec));

  147. // now add to central directory record

  148. $cdrec = "\x50\x4b\x01\x02";
  149. $cdrec .= "\x00\x00"; // version made by
  150. $cdrec .= "\x14\x00"; // version needed to extract
  151. $cdrec .= "\x00\x00"; // gen purpose bit flag
  152. $cdrec .= "\x08\x00"; // compression method
  153. $cdrec .= $hexdtime; // last mod time & date
  154. $cdrec .= pack('V', $crc); // crc32
  155. $cdrec .= pack('V', $c_len); // compressed filesize
  156. $cdrec .= pack('V', $unc_len); // uncompressed filesize
  157. $cdrec .= pack('v', strlen($name) ); // length of filename
  158. $cdrec .= pack('v', 0 ); // extra field length
  159. $cdrec .= pack('v', 0 ); // file comment length
  160. $cdrec .= pack('v', 0 ); // disk number start
  161. $cdrec .= pack('v', 0 ); // internal file attributes
  162. $cdrec .= pack('V', 32 ); // external file attributes - 'archive' bit set

  163. $cdrec .= pack('V', $this -> old_offset ); // relative offset of local header

  164. $this -> old_offset = $new_offset;

  165. $cdrec .= $name;

  166. // optional extra field, file comment goes here

  167. // save to central directory
  168. $this -> ctrl_dir[] = $cdrec;
  169. } // end of the 'addFile()' method

  170. /**

  171. * Dumps out file
  172. *
  173. * @return string the zipped file
  174. *
  175. * @access public
  176. */
  177. function file()
  178. {
  179. $data = implode('', $this -> datasec);
  180. $ctrldir = implode('', $this -> ctrl_dir);

  181. return

  182. $data .
  183. $ctrldir .
  184. $this -> eof_ctrl_dir .
  185. pack('v', sizeof($this -> ctrl_dir)) . // total # of entries "on this disk"
  186. pack('v', sizeof($this -> ctrl_dir)) . // total # of entries overall
  187. pack('V', strlen($ctrldir)) . // size of central dir
  188. pack('V', strlen($data)) . // offset to start of central dir
  189. "\x00\x00"; // .zip file comment length
  190. } // end of the 'file()' method

  191. } // end of the 'PHPZip' class

  192. ?>
复制代码

老外实现的php zip压缩类，个人感觉还是不错的，里面有大量php实用函数的应用技巧，特别是函数pack、crc32、gzcompress等函数的应用，值得学习借鉴。



Déclaration：
Le contenu de cet article est volontairement contribué par les internautes et les droits d'auteur appartiennent à l'auteur original. Ce site n'assume aucune responsabilité légale correspondante. Si vous trouvez un contenu suspecté de plagiat ou de contrefaçon, veuillez contacter admin@php.cn
Article précédent：php与js对数据库图片等比缩放的代码 Article suivant：php 冒泡排序

Articles Liés

Voir plus