diff --git a/system/libs/cache.php b/system/libs/cache.php
index 39a1e354..faa868e2 100644
--- a/system/libs/cache.php
+++ b/system/libs/cache.php
@@ -10,6 +10,14 @@
  */
 defined('MYAAC') or die('Direct access not allowed!');
 
+/**
+ * Class Cache
+ *
+ * @method set($key, $var, $ttl = 0)
+ * @method get($key)
+ * @method fetch($key, &$var)
+ * @method delete($key)
+ */
 class Cache
 {
 	static private $instance;
diff --git a/system/libs/cache_apc.php b/system/libs/cache_apc.php
index f936953e..22fb0dc9 100644
--- a/system/libs/cache_apc.php
+++ b/system/libs/cache_apc.php
@@ -12,7 +12,7 @@ defined('MYAAC') or die('Direct access not allowed!');
 
 class Cache_APC
 {
-	private $prefix = '';
+	private $prefix;
 	private $enabled;
 
 	public function __construct($prefix = '')
@@ -31,8 +31,9 @@ class Cache_APC
 	public function get($key)
 	{
 		$tmp = '';
-		if($this->fetch($this->prefix . $key, $tmp))
+		if($this->fetch($this->prefix . $key, $tmp)) {
 			return $tmp;
+		}
 
 		return '';
 	}
@@ -48,5 +49,4 @@ class Cache_APC
 	public function enabled() {
 		return $this->enabled;
 	}
-}
-?>
+}
\ No newline at end of file
diff --git a/system/libs/cache_apcu.php b/system/libs/cache_apcu.php
index 398c5251..f7b3077e 100644
--- a/system/libs/cache_apcu.php
+++ b/system/libs/cache_apcu.php
@@ -12,7 +12,7 @@ defined('MYAAC') or die('Direct access not allowed!');
 
 class Cache_APCu
 {
-	private $prefix = '';
+	private $prefix;
 	private $enabled;
 
 	public function __construct($prefix = '')
@@ -31,8 +31,9 @@ class Cache_APCu
 	public function get($key)
 	{
 		$tmp = '';
-		if($this->fetch($this->prefix . $key, $tmp))
+		if($this->fetch($this->prefix . $key, $tmp)) {
 			return $tmp;
+		}
 
 		return '';
 	}
@@ -49,4 +50,3 @@ class Cache_APCu
 		return $this->enabled;
 	}
 }
-?>
diff --git a/system/libs/cache_eaccelerator.php b/system/libs/cache_eaccelerator.php
index 1d776f26..0815f10d 100644
--- a/system/libs/cache_eaccelerator.php
+++ b/system/libs/cache_eaccelerator.php
@@ -30,8 +30,9 @@ class Cache_eAccelerator
 	public function get($key)
 	{
 		$tmp = '';
-		if($this->fetch($this->prefix . $key, $tmp))
+		if($this->fetch($this->prefix . $key, $tmp)) {
 			return $tmp;
+		}
 
 		return '';
 	}
@@ -48,4 +49,3 @@ class Cache_eAccelerator
 		return $this->enabled;
 	}
 }
-?>
diff --git a/system/libs/cache_file.php b/system/libs/cache_file.php
index 3e8308a6..89f2087b 100644
--- a/system/libs/cache_file.php
+++ b/system/libs/cache_file.php
@@ -11,8 +11,8 @@ defined('MYAAC') or die('Direct access not allowed!');
 
 class Cache_File
 {
-	private $prefix = '';
-	private $dir = '';
+	private $prefix;
+	private $dir;
 	private $enabled;
 
 	public function __construct($prefix = '', $dir = '') {
@@ -25,17 +25,21 @@ class Cache_File
 	{
 		$file = $this->_name($key);
 		file_put_contents($file, $var);
-		if($ttl != 0)
+
+		if($ttl !== 0) {
 			touch($file, time() + $ttl);
-		else
+		}
+		else {
 			touch($file, time() + 24 * 60 * 60);
+		}
 	}
 
 	public function get($key)
 	{
 		$tmp = '';
-		if($this->fetch($key, $tmp))
+		if($this->fetch($key, $tmp)) {
 			return $tmp;
+		}
 
 		return '';
 	}
@@ -43,8 +47,9 @@ class Cache_File
 	public function fetch($key, &$var)
 	{
 		$file = $this->_name($key);
-		if(!file_exists($file) || filemtime($file) < time())
+		if(!file_exists($file) || filemtime($file) < time()) {
 			return false;
+		}
 
 		$var = file_get_contents($file);
 		return true;
@@ -53,8 +58,9 @@ class Cache_File
 	public function delete($key)
 	{
 		$file = $this->_name($key);
-		if(file_exists($file))
+		if(file_exists($file)) {
 			unlink($file);
+		}
 	}
 
 	public function enabled() {
@@ -62,7 +68,6 @@ class Cache_File
 	}
 
 	private function _name($key) {
-		return sprintf("%s%s%s", $this->dir, $this->prefix, sha1($key));
+		return sprintf('%s%s%s', $this->dir, $this->prefix, sha1($key));
 	}
-}
-?>
+}
\ No newline at end of file
diff --git a/system/libs/cache_php.php b/system/libs/cache_php.php
index 355b2829..84a41ac3 100644
--- a/system/libs/cache_php.php
+++ b/system/libs/cache_php.php
@@ -42,8 +42,9 @@ class Cache_PHP
 	public function get($key)
 	{
 		$tmp = '';
-		if($this->fetch($key, $tmp))
+		if($this->fetch($key, $tmp)) {
 			return $tmp;
+		}
 
 		return '';
 	}
@@ -51,8 +52,9 @@ class Cache_PHP
 	public function fetch($key, &$var)
 	{
 		$file = $this->_name($key);
-		if(!file_exists($file) || filemtime($file) < time())
+		if(!file_exists($file) || filemtime($file) < time()) {
 			return false;
+		}
 
 		@include $file;
 		$var = isset($var) ? $var : null;
@@ -62,8 +64,9 @@ class Cache_PHP
 	public function delete($key)
 	{
 		$file = $this->_name($key);
-		if(file_exists($file))
+		if(file_exists($file)) {
 			unlink($file);
+		}
 	}
 
 	public function enabled() {
@@ -73,5 +76,4 @@ class Cache_PHP
 	private function _name($key) {
 		return sprintf('%s%s%s', $this->dir, $this->prefix, sha1($key) . '.php');
 	}
-}
-?>
+}
\ No newline at end of file
diff --git a/system/libs/cache_xcache.php b/system/libs/cache_xcache.php
index 0e80bfb6..104ae5b3 100644
--- a/system/libs/cache_xcache.php
+++ b/system/libs/cache_xcache.php
@@ -12,7 +12,7 @@ defined('MYAAC') or die('Direct access not allowed!');
 
 class Cache_XCache
 {
-	private $prefix = '';
+	private $prefix;
 	private $enabled;
 
 	public function __construct($prefix = '') {
@@ -30,8 +30,9 @@ class Cache_XCache
 	public function get($key)
 	{
 		$tmp = '';
-		if($this->fetch($this->prefix . $key, $tmp))
+		if($this->fetch($this->prefix . $key, $tmp)) {
 			return $tmp;
+		}
 
 		return '';
 	}
@@ -39,8 +40,9 @@ class Cache_XCache
 	public function fetch($key, &$var)
 	{
 		$key = $this->prefix . $key;
-		if(!xcache_isset($key))
+		if(!xcache_isset($key)) {
 			return false;
+		}
 
 		$var = xcache_get($key);
 		return true;
@@ -54,4 +56,3 @@ class Cache_XCache
 		return $this->enabled;
 	}
 }
-?>