Improve the Cache library

1 files changed, 22 insertions, 33 deletions

diff --git a/system/libraries/Cache/drivers/Cache_file.php b/system/libraries/Cache/drivers/Cache_file.php
index be392d3d2..194279726 100644
--- a/system/libraries/Cache/drivers/Cache_file.php
+++ b/system/libraries/Cache/drivers/Cache_file.php
@@ -1,13 +1,13 @@
-<?php  if ( ! defined('BASEPATH')) exit('No direct script access allowed');
+<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
 /**
  * CodeIgniter
  *
  * An open source application development framework for PHP 5.1.6 or newer
  *
  * NOTICE OF LICENSE
- * 
+ *
  * Licensed under the Open Software License version 3.0
- * 
+ *
  * This source file is subject to the Open Software License (OSL 3.0) that is
  * bundled with this package in the files license.txt / license.rst.  It is
  * also available through the world wide web at this URL:
@@ -22,19 +22,19 @@
  * @license		http://opensource.org/licenses/OSL-3.0 Open Software License (OSL 3.0)
  * @link		http://codeigniter.com
  * @since		Version 2.0
- * @filesource	
+ * @filesource
  */
 
 // ------------------------------------------------------------------------
 
 /**
- * CodeIgniter Memcached Caching Class 
+ * CodeIgniter Memcached Caching Class
  *
  * @package		CodeIgniter
  * @subpackage	Libraries
  * @category	Core
  * @author		EllisLab Dev Team
- * @link		
+ * @link
  */
 
 class CI_Cache_file extends CI_Driver {
@@ -48,9 +48,7 @@ class CI_Cache_file extends CI_Driver {
 	{
 		$CI =& get_instance();
 		$CI->load->helper('file');
-		
 		$path = $CI->config->item('cache_path');
-	
 		$this->_cache_path = ($path == '') ? APPPATH.'cache/' : $path;
 	}
 
@@ -68,16 +66,15 @@ class CI_Cache_file extends CI_Driver {
 		{
 			return FALSE;
 		}
-		
-		$data = read_file($this->_cache_path.$id);
-		$data = unserialize($data);
-		
+
+		$data = unserialize(read_file($this->_cache_path.$id));
+
 		if (time() >  $data['time'] + $data['ttl'])
 		{
 			unlink($this->_cache_path.$id);
 			return FALSE;
 		}
-		
+
 		return $data['data'];
 	}
 
@@ -88,22 +85,22 @@ class CI_Cache_file extends CI_Driver {
 	 *
 	 * @param 	string		unique key
 	 * @param 	mixed		data to store
-	 * @param 	int			length of time (in seconds) the cache is valid 
+	 * @param 	int			length of time (in seconds) the cache is valid
 	 *						- Default is 60 seconds
 	 * @return 	boolean		true on success/false on failure
 	 */
 	public function save($id, $data, $ttl = 60)
-	{		
+	{
 		$contents = array(
 				'time'		=> time(),
-				'ttl'		=> $ttl,			
+				'ttl'		=> $ttl,
 				'data'		=> $data
 			);
-		
+
 		if (write_file($this->_cache_path.$id, serialize($contents)))
 		{
 			@chmod($this->_cache_path.$id, 0777);
-			return TRUE;			
+			return TRUE;
 		}
 
 		return FALSE;
@@ -119,14 +116,7 @@ class CI_Cache_file extends CI_Driver {
 	 */
 	public function delete($id)
 	{
-		if (file_exists($this->_cache_path.$id))
-		{
-			return unlink($this->_cache_path.$id);
-		}
-		else
-		{
-			return FALSE;
-		}
+		return (file_exists($this->_cache_path.$id)) ? unlink($this->_cache_path.$id) : FALSE;
 	}
 
 	// ------------------------------------------------------------------------
@@ -135,7 +125,7 @@ class CI_Cache_file extends CI_Driver {
 	 * Clean the Cache
 	 *
 	 * @return 	boolean		false on failure/true on success
-	 */	
+	 */
 	public function clean()
 	{
 		return delete_files($this->_cache_path);
@@ -170,10 +160,9 @@ class CI_Cache_file extends CI_Driver {
 		{
 			return FALSE;
 		}
-		
-		$data = read_file($this->_cache_path.$id);		
-		$data = unserialize($data);
-		
+
+		$data = unserialize(read_file($this->_cache_path.$id));
+
 		if (is_array($data))
 		{
 			$mtime = filemtime($this->_cache_path.$id);
@@ -188,7 +177,7 @@ class CI_Cache_file extends CI_Driver {
 				'mtime'	 => $mtime
 			);
 		}
-		
+
 		return FALSE;
 	}
 
@@ -198,7 +187,7 @@ class CI_Cache_file extends CI_Driver {
 	 * Is supported
 	 *
 	 * In the file driver, check to see that the cache directory is indeed writable
-	 * 
+	 *
 	 * @return boolean
 	 */
 	public function is_supported()