Some sweeping syntax changes for consistency:

(! foo) changed to ( ! foo)
|| changed to OR
changed newline standardization code in various places from preg_replace to str_replace
diff --git a/system/libraries/Zip.php b/system/libraries/Zip.php
index 5a24e40..97695a0 100644
--- a/system/libraries/Zip.php
+++ b/system/libraries/Zip.php
@@ -1,4 +1,4 @@
-<?php  if (!defined('BASEPATH')) exit('No direct script access allowed');

+<?php  if ( ! defined('BASEPATH')) exit('No direct script access allowed');

 /**

  * CodeIgniter

  *

@@ -57,7 +57,7 @@
 	{

 		foreach ((array)$directory as $dir)

 		{

-			if (! preg_match("|.+/$|", $dir))

+			if ( ! preg_match("|.+/$|", $dir))

 			{

 				$dir .= '/';

 			}

@@ -196,7 +196,7 @@
 	 */	

 	function read_file($path, $preserve_filepath = FALSE)

 	{

-		if (! file_exists($path))

+		if ( ! file_exists($path))

 		{

 			return FALSE;

 		}

@@ -301,7 +301,7 @@
 	 */	

 	function archive($filepath)

 	{

-		if (! ($fp = @fopen($filepath, FOPEN_WRITE_CREATE_DESTRUCTIVE)))

+		if ( ! ($fp = @fopen($filepath, FOPEN_WRITE_CREATE_DESTRUCTIVE)))

 		{

 			return FALSE;

 		}

@@ -326,7 +326,7 @@
 	 */		

 	function download($filename = 'backup.zip')

 	{

-		if (! preg_match("|.+?\.zip$|", $filename))

+		if ( ! preg_match("|.+?\.zip$|", $filename))

 		{

 			$filename .= '.zip';

 		}

@@ -374,6 +374,6 @@
 	}

 	

 }

-
-/* End of file Zip.php */
+

+/* End of file Zip.php */

 /* Location: ./system/libraries/Zip.php */
\ No newline at end of file