diff --git a/system/core/Output.php b/system/core/Output.php
index faebbbe..9bf818e 100755
--- a/system/core/Output.php
+++ b/system/core/Output.php
@@ -25,8 +25,6 @@
  * @filesource
  */
 
-// ------------------------------------------------------------------------
-
 /**
  * Output Class
  *
@@ -94,7 +92,7 @@
 		$this->_zlib_oc = @ini_get('zlib.output_compression');
 
 		// Get mime types for later
-		if (defined('ENVIRONMENT') AND file_exists(APPPATH.'config/'.ENVIRONMENT.'/mimes.php'))
+		if (defined('ENVIRONMENT') && file_exists(APPPATH.'config/'.ENVIRONMENT.'/mimes.php'))
 		{
 			include APPPATH.'config/'.ENVIRONMENT.'/mimes.php';
 		}
@@ -229,7 +227,7 @@
 	 * Set HTTP Status Header
 	 * moved to Common procedural functions in 1.7.2
 	 *
-	 * @param	int		the status code
+	 * @param	int	the status code
 	 * @param	string
 	 * @return	void
 	 */
@@ -249,7 +247,7 @@
 	 */
 	public function enable_profiler($val = TRUE)
 	{
-		$this->enable_profiler = (is_bool($val)) ? $val : TRUE;
+		$this->enable_profiler = is_bool($val) ? $val : TRUE;
 		return $this;
 	}
 
@@ -267,7 +265,7 @@
 	{
 		foreach ($sections as $section => $enable)
 		{
-			$this->_profiler_sections[$section] = ($enable !== FALSE) ? TRUE : FALSE;
+			$this->_profiler_sections[$section] = ($enable !== FALSE);
 		}
 
 		return $this;
@@ -278,12 +276,12 @@
 	/**
 	 * Set Cache
 	 *
-	 * @param	integer
+	 * @param	int
 	 * @return	void
 	 */
 	public function cache($time)
 	{
-		$this->cache_expiration = ( ! is_numeric($time)) ? 0 : $time;
+		$this->cache_expiration = is_numeric($time) ? $time : 0;
 		return $this;
 	}
 
@@ -297,7 +295,7 @@
 	 * $this->final_output
 	 *
 	 * This function sends the finalized output data to the browser along
-	 * with any server headers and profile data.  It also stops the
+	 * with any server headers and profile data. It also stops the
 	 * benchmark timer so the page rendering speed and memory usage can be shown.
 	 *
 	 * @param 	string
@@ -343,7 +341,7 @@
 
 		if ($this->parse_exec_vars === TRUE)
 		{
-			$memory	 = ( ! function_exists('memory_get_usage')) ? '0' : round(memory_get_usage()/1024/1024, 2).'MB';
+			$memory	= function_exists('memory_get_usage') ? round(memory_get_usage()/1024/1024, 2).'MB' : '0';
 
 			$output = str_replace(array('{elapsed_time}', '{memory_usage}'), array($elapsed, $memory), $output);
 		}
@@ -520,4 +518,4 @@
 }
 
 /* End of file Output.php */
-/* Location: ./system/core/Output.php */
+/* Location: ./system/core/Output.php */
\ No newline at end of file
diff --git a/system/core/Router.php b/system/core/Router.php
index b251abb..5477fed 100755
--- a/system/core/Router.php
+++ b/system/core/Router.php
@@ -25,8 +25,6 @@
  * @filesource
  */
 
-// ------------------------------------------------------------------------
-
 /**
  * Router Class
  *
@@ -111,7 +109,7 @@
 		// since URI segments are more search-engine friendly, but they can optionally be used.
 		// If this feature is enabled, we will gather the directory/class/method a little differently
 		$segments = array();
-		if ($this->config->item('enable_query_strings') === TRUE AND isset($_GET[$this->config->item('controller_trigger')]))
+		if ($this->config->item('enable_query_strings') === TRUE && isset($_GET[$this->config->item('controller_trigger')]))
 		{
 			if (isset($_GET[$this->config->item('directory_trigger')]))
 			{
@@ -133,7 +131,7 @@
 		}
 
 		// Load the routes.php file.
-		if (defined('ENVIRONMENT') AND is_file(APPPATH.'config/'.ENVIRONMENT.'/routes.php'))
+		if (defined('ENVIRONMENT') && is_file(APPPATH.'config/'.ENVIRONMENT.'/routes.php'))
 		{
 			include(APPPATH.'config/'.ENVIRONMENT.'/routes.php');
 		}
@@ -147,7 +145,7 @@
 
 		// Set the default controller so we can display it in the event
 		// the URI doesn't correlated to a valid controller.
-		$this->default_controller = ( ! isset($this->routes['default_controller']) OR $this->routes['default_controller'] == '') ? FALSE : strtolower($this->routes['default_controller']);
+		$this->default_controller = empty($this->routes['default_controller']) ? FALSE : strtolower($this->routes['default_controller']);
 
 		// Were there any query string segments? If so, we'll validate them and bail out since we're done.
 		if (count($segments) > 0)
@@ -248,8 +246,8 @@
 	// --------------------------------------------------------------------
 
 	/**
-	 * Validates the supplied segments.  Attempts to determine the path to
-	 * the controller.
+	 * Validates the supplied segments.
+	 * Attempts to determine the path to the controller.
 	 *
 	 * @param	array
 	 * @return	array
@@ -340,7 +338,7 @@
 	// --------------------------------------------------------------------
 
 	/**
-	 *  Parse Routes
+	 * Parse Routes
 	 *
 	 * This function matches any routes that may exist in
 	 * the config/routes.php file against the URI to
@@ -369,7 +367,7 @@
 			if (preg_match('#^'.$key.'$#', $uri))
 			{
 				// Do we have a back-reference?
-				if (strpos($val, '$') !== FALSE AND strpos($key, '(') !== FALSE)
+				if (strpos($val, '$') !== FALSE && strpos($key, '(') !== FALSE)
 				{
 					$val = preg_replace('#^'.$key.'$#', $val, $uri);
 				}
@@ -411,7 +409,7 @@
 	// --------------------------------------------------------------------
 
 	/**
-	 *  Set the method name
+	 * Set the method name
 	 *
 	 * @param	string
 	 * @return	void
@@ -424,7 +422,7 @@
 	// --------------------------------------------------------------------
 
 	/**
-	 *  Fetch the current method
+	 * Fetch the current method
 	 *
 	 * @return	string
 	 */
@@ -441,7 +439,7 @@
 	// --------------------------------------------------------------------
 
 	/**
-	 *  Set the directory name
+	 * Set the directory name
 	 *
 	 * @param	string
 	 * @return	void
@@ -454,7 +452,7 @@
 	// --------------------------------------------------------------------
 
 	/**
-	 *  Fetch the sub-directory (if any) that contains the requested controller class
+	 * Fetch the sub-directory (if any) that contains the requested controller class
 	 *
 	 * @return	string
 	 */
@@ -466,10 +464,10 @@
 	// --------------------------------------------------------------------
 
 	/**
-	 *  Set the controller overrides
+	 * Set the controller overrides
 	 *
 	 * @param	array
-	 * @return	null
+	 * @return	void
 	 */
 	public function _set_overrides($routing)
 	{
@@ -483,7 +481,7 @@
 			$this->set_directory($routing['directory']);
 		}
 
-		if (isset($routing['controller']) AND $routing['controller'] != '')
+		if (isset($routing['controller']) && $routing['controller'] != '')
 		{
 			$this->set_class($routing['controller']);
 		}
@@ -498,4 +496,4 @@
 }
 
 /* End of file Router.php */
-/* Location: ./system/core/Router.php */
+/* Location: ./system/core/Router.php */
\ No newline at end of file