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Zip Files on the Fly

/ Published in: PHP
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  1. /* creates a compressed zip file */
  2. function create_zip($files = array(),$destination = '',$overwrite = false) {
  3. 	//if the zip file already exists and overwrite is false, return false
  4. 	if(file_exists($destination) && !$overwrite) { return false; }
  5. 	//vars
  6. 	$valid_files = array();
  7. 	//if files were passed in...
  8. 	if(is_array($files)) {
  9. 		//cycle through each file
  10. 		foreach($files as $file) {
  11. 			//make sure the file exists
  12. 			if(file_exists($file)) {
  13. 				$valid_files[] = $file;
  14. 			}
  15. 		}
  16. 	}
  17. 	//if we have good files...
  18. 	if(count($valid_files)) {
  19. 		//create the archive
  20. 		$zip = new ZipArchive();
  21. 		if($zip->open($destination,$overwrite ? ZIPARCHIVE::OVERWRITE : ZIPARCHIVE::CREATE) !== true) {
  22. 			return false;
  23. 		}
  24. 		//add the files
  25. 		foreach($valid_files as $file) {
  26. 			$zip->addFile($file,$file);
  27. 		}
  28. 		//debug
  29. 		//echo 'The zip archive contains ',$zip->numFiles,' files with a status of ',$zip->status;
  30.  
  31. 		//close the zip -- done!
  32. 		$zip->close();
  33.  
  34. 		//check to make sure the file exists
  35. 		return file_exists($destination);
  36. 	}
  37. 	else
  38. 	{
  39. 		return false;
  40. 	}
  41. }
  42. /***** Example Usage ***/
  43. $files=array('file1.jpg', 'file2.jpg', 'file3.gif');
  44. create_zip($files, 'myzipfile.zip', true);

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