diff --git a/system/helpers/number_helper.php b/system/helpers/number_helper.php
index 71d39df..331b468 100644
--- a/system/helpers/number_helper.php
+++ b/system/helpers/number_helper.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:
@@ -83,6 +83,5 @@
 	}
 }
 
-
 /* End of file number_helper.php */
-/* Location: ./system/helpers/number_helper.php */
\ No newline at end of file
+/* Location: ./system/helpers/number_helper.php */
diff --git a/system/helpers/path_helper.php b/system/helpers/path_helper.php
index da2b8d3..cd87a73 100644
--- a/system/helpers/path_helper.php
+++ b/system/helpers/path_helper.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:
@@ -60,25 +60,21 @@
 		// Resolve the path
 		if (function_exists('realpath') AND @realpath($path) !== FALSE)
 		{
-			$path = realpath($path).'/';
+			$path = realpath($path);
 		}
 
 		// Add a trailing slash
-		$path = preg_replace("#([^/])/*$#", "\\1/", $path);
+		$path = rtrim($path, DIRECTORY_SEPARATOR).DIRECTORY_SEPARATOR;
 
 		// Make sure the path exists
-		if ($check_existance == TRUE)
+		if ($check_existance == TRUE && ! is_dir($path))
 		{
-			if ( ! is_dir($path))
-			{
-				show_error('Not a valid path: '.$path);
-			}
+			show_error('Not a valid path: '.$path);
 		}
 
 		return $path;
 	}
 }
 
-
 /* End of file path_helper.php */
-/* Location: ./system/helpers/path_helper.php */
\ No newline at end of file
+/* Location: ./system/helpers/path_helper.php */
diff --git a/system/helpers/security_helper.php b/system/helpers/security_helper.php
index d64bd12..99fda56 100644
--- a/system/helpers/security_helper.php
+++ b/system/helpers/security_helper.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:
@@ -87,14 +87,7 @@
 {
 	function do_hash($str, $type = 'sha1')
 	{
-		if ($type == 'sha1')
-		{
-			return sha1($str);
-		}
-		else
-		{
-			return md5($str);
-		}
+		return ($type === 'sha1') ? sha1($str) : md5($str);
 	}
 }
 
@@ -111,10 +104,7 @@
 {
 	function strip_image_tags($str)
 	{
-		$str = preg_replace("#<img\s+.*?src\s*=\s*[\"'](.+?)[\"'].*?\>#", "\\1", $str);
-		$str = preg_replace("#<img\s+.*?src\s*=\s*(.+?).*?\>#", "\\1", $str);
-
-		return $str;
+		return preg_replace(array("#<img\s+.*?src\s*=\s*[\"'](.+?)[\"'].*?\>#", "#<img\s+.*?src\s*=\s*(.+?).*?\>#"), "\\1", $str);
 	}
 }
 
@@ -135,6 +125,5 @@
 	}
 }
 
-
 /* End of file security_helper.php */
-/* Location: ./system/helpers/security_helper.php */
\ No newline at end of file
+/* Location: ./system/helpers/security_helper.php */