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Crear archivos ZIP con PHP (Otra forma)

Posted on Nov 05 in PHPby adminPrintText Resizer Text Resizer

Script que te permite Crear achivo ZIP, en tu hosting Linux, el cual resulta de gran utilidad por a la hora de comprimir archivos o ficheros en nuestro serve, para asi ahorranos espacio de disco duro, y reducir tambien la transferencia - cortesia de http://www.themepark.com - aqui esta el codigo:

PLAIN TEXT
PHP:
  1. <?php
  2. /*
  4. Zip file creation class
  5. makes zip files on the fly...
  6. use the functions add_dir() and add_file() to build the zip file;
  8. see example code below
  10. by Eric Mueller
  11. http://www.themepark.com
  13. v1.1 9-20-01
  15. - added comments to example
  17. v1.0 2-5-01
  19. initial version with:
  20. - class appearance
  21. - add_file() and file() methods
  22. - gzcompress() output hacking
  23. by Denis O.Philippov, webmaster@atlant.ru, http://www.atlant.ru
  26. */
  27. // official ZIP file format: http://www.pkware.com/appnote.txt
  28.  
  29. class zipfile
  30. {
  31. var $datasec = array(); // array to store compressed data
  32. var $ctrl_dir = array(); // central directory
  33. var $eof_ctrl_dir = "x50x4bx05x06x00x00x00x00"; //end of Central directory record
  34. var $old_offset = 0;
  35.  
  36. function add_dir($name)
  37.  
  38. // adds "directory" to archive - do this before putting any files in directory!
  39. // $name - name of directory... like this: "path/"
  40. // ...then you can add files using add_file with names like "path/file.txt"
  41. {
  42. $name = str_replace("", "/", $name);
  43.  
  44. $fr = "x50x4bx03x04";
  45. $fr .= "x0ax00"; // ver needed to extract
  46. $fr .= "x00x00"; // gen purpose bit flag
  47. $fr .= "x00x00"; // compression method
  48. $fr .= "x00x00x00x00"; // last mod time and date
  49. $fr .= pack("V",0); // crc32
  50. $fr .= pack("V",0); //compressed filesize
  51. $fr .= pack("V",0); //uncompressed filesize
  52. $fr .= pack("v", strlen($name) ); //length of pathname
  53. $fr .= pack("v", 0 ); //extra field length
  54. $fr .= $name;
  55. // end of "local file header" segment
  56.  
  57. // no "file data" segment for path
  58.  
  59. // "data descriptor" segment (optional but necessary if archive is not served as file)
  60. $fr .= pack("V",$crc); //crc32
  61. $fr .= pack("V",$c_len); //compressed filesize
  62. $fr .= pack("V",$unc_len); //uncompressed filesize
  63.  
  64. // add this entry to array
  65. $this -> datasec[] = $fr;
  66. $new_offset = strlen(implode("", $this->datasec));
  67.  
  68. // ext. file attributes mirrors MS-DOS directory attr byte, detailed
  69. // at http://support.microsoft.com/support/kb/articles/Q125/0/19.asp
  70.  
  71. // now add to central record
  72. $cdrec = "x50x4bx01x02";
  73. $cdrec .="x00x00"; // version made by
  74. $cdrec .="x0ax00"; // version needed to extract
  75. $cdrec .="x00x00"; // gen purpose bit flag
  76. $cdrec .="x00x00"; // compression method
  77. $cdrec .="x00x00x00x00"; // last mod time & date
  78. $cdrec .= pack("V",0); // crc32
  79. $cdrec .= pack("V",0); //compressed filesize
  80. $cdrec .= pack("V",0); //uncompressed filesize
  81. $cdrec .= pack("v", strlen($name) ); //length of filename
  82. $cdrec .= pack("v", 0 ); //extra field length
  83. $cdrec .= pack("v", 0 ); //file comment length
  84.  
  85. $cdrec .= pack("v", 0 ); //disk number start
  86. $cdrec .= pack("v", 0 ); //internal file attributes
  87.  
  88. $ext = "x00x00x10x00";
  89. $ext = "xffxffxffxff";
  90. $cdrec .= pack("V", 16 ); //external file attributes - 'directory' bit set
  91.  
  92. $cdrec .= pack("V", $this -> old_offset ); //relative offset of local header
  93. $this -> old_offset = $new_offset;
  94. $cdrec .= $name;
  95. // optional extra field, file comment goes here
  96. // save to array
  97. $this -> ctrl_dir[] = $cdrec;
  98. }
  99. function add_file($data, $name)
  100. // adds "file" to archive
  101. // $data - file contents
  102. // $name - name of file in archive. Add path if your want
  103. {
  104. $name = str_replace("", "/", $name);
  105. //$name = str_replace("", "", $name);
  106. $fr = "x50x4bx03x04";
  107. $fr .= "x14x00"; // ver needed to extract
  108. $fr .= "x00x00"; // gen purpose bit flag
  109. $fr .= "x08x00"; // compression method
  110. $fr .= "x00x00x00x00"; // last mod time and date
  111.  
  112. $unc_len = strlen($data);
  113. $crc = crc32($data);
  114. $zdata = gzcompress($data);
  115. $zdata = substr( substr($zdata, 0, strlen($zdata) - 4), 2); // fix crc bug
  116. $c_len = strlen($zdata);
  117. $fr .= pack("V",$crc); // crc32
  118. $fr .= pack("V",$c_len); //compressed filesize
  119. $fr .= pack("V",$unc_len); //uncompressed filesize
  120. $fr .= pack("v", strlen($name) ); //length of filename
  121. $fr .= pack("v", 0 ); //extra field length
  122. $fr .= $name;
  123. // end of "local file header" segment
  124. // "file data" segment
  125. $fr .= $zdata;
  126.  
  127. // "data descriptor" segment (optional but necessary if archive is not served as file)
  128. $fr .= pack("V",$crc); //crc32
  129. $fr .= pack("V",$c_len); //compressed filesize
  130. $fr .= pack("V",$unc_len); //uncompressed filesize
  131.  
  132. // add this entry to array
  133. $this -> datasec[] = $fr;
  134. $new_offset = strlen(implode("", $this->datasec));
  135.  
  136. // now add to central directory record
  137. $cdrec = "x50x4bx01x02";
  138. $cdrec .="x00x00"; // version made by
  139. $cdrec .="x14x00"; // version needed to extract
  140. $cdrec .="x00x00"; // gen purpose bit flag
  141. $cdrec .="x08x00"; // compression method
  142. $cdrec .="x00x00x00x00"; // last mod time & date
  143. $cdrec .= pack("V",$crc); // crc32
  144. $cdrec .= pack("V",$c_len); //compressed filesize
  145. $cdrec .= pack("V",$unc_len); //uncompressed filesize
  146. $cdrec .= pack("v", strlen($name) ); //length of filename
  147. $cdrec .= pack("v", 0 ); //extra field length
  148. $cdrec .= pack("v", 0 ); //file comment length
  149. $cdrec .= pack("v", 0 ); //disk number start
  150. $cdrec .= pack("v", 0 ); //internal file attributes
  151. $cdrec .= pack("V", 32 ); //external file attributes - 'archive' bit set
  152.  
  153. $cdrec .= pack("V", $this -> old_offset ); //relative offset of local header
  154. // echo "old offset is ".$this->old_offset.", new offset is $new_offset<br />";
  155. $this -> old_offset = $new_offset;
  156.  
  157. $cdrec .= $name;
  158. // optional extra field, file comment goes here
  159. // save to central directory
  160. $this -> ctrl_dir[] = $cdrec;
  161.  
  162. }
  163. function file() { // dump out file
  164. $data = implode("", $this -> datasec);
  165. $ctrldir = implode("", $this -> ctrl_dir);
  166. return
  167. $data.
  168. $ctrldir.
  169. $this -> eof_ctrl_dir.
  170. pack("v", sizeof($this -> ctrl_dir)). // total # of entries "on this disk"
  171. pack("v", sizeof($this -> ctrl_dir)). // total # of entries overall
  172. pack("V", strlen($ctrldir)). // size of central dir
  173. pack("V", strlen($data)). // offset to start of central dir
  174. "x00x00"; // .zip file comment length
  175. }
  176. }
  177. ?>

Ejemplo:

PLAIN TEXT
PHP:
  1. <?php
  2. $zipfile = new zipfile();
  3.  
  4. // add the subdirectory ... important!
  5. $zipfile -> add_dir("dir/");
  6.  
  7. // add the binary data stored in the string 'filedata'
  8. $filedata = "(read your file into $filedata)";
  9. $zipfile -> add_file($filedata, "dir/file.txt");
  10.  
  11. // the next three lines force an immediate download of the zip file:
  12. header("Content-type: application/octet-stream");
  13. header("Content-disposition: attachment; filename=test.zip");
  14. echo $zipfile -> file();
  15.  
  16.  
  17. // OR instead of doing that, you can write out the file to the loca disk like this:
  18. $filename = "output.zip";
  19. $fd = fopen ($filename, "wb");
  20. $out = fwrite ($fd, $zipfile -> file());
  21. fclose ($fd);
  22.  
  23. ?>

Compártelo!

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Entry Details: This entry was posted on Lunes, Noviembre 5th, 2007 at 15:13, by admin, and is filed under PHP. You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response, or trackback from your own site. Print This!
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