diff --git a/system/helpers/string_helper.php b/system/helpers/string_helper.php
index 04d51c2..654f721 100644
--- a/system/helpers/string_helper.php
+++ b/system/helpers/string_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:
@@ -86,7 +86,7 @@
 		}
 		else
 		{
-			$str = stripslashes($str);
+			return stripslashes($str);
 		}
 
 		return $str;
@@ -182,12 +182,7 @@
 	{
 		$str = preg_replace('#'.preg_quote($character, '#').'{2,}#', $character, $str);
 
-		if ($trim === TRUE)
-		{
-			$str = trim($str, $character);
-		}
-
-		return $str;
+		return ($trim === TRUE) ? trim($str, $character) : $str;
 	}
 }
 
@@ -207,44 +202,32 @@
 {
 	function random_string($type = 'alnum', $len = 8)
 	{
-		switch($type)
+		switch ($type)
 		{
-			case 'basic'	: return mt_rand();
-				break;
-			case 'alnum'	:
-			case 'numeric'	:
-			case 'nozero'	:
-			case 'alpha'	:
-
-					switch ($type)
-					{
-						case 'alpha'	:	$pool = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ';
-							break;
-						case 'alnum'	:	$pool = '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ';
-							break;
-						case 'numeric'	:	$pool = '0123456789';
-							break;
-						case 'nozero'	:	$pool = '123456789';
-							break;
-					}
-					
-					$str = substr(str_shuffle(str_repeat($pool, ceil($len/strlen($pool)))),0,$len);
-					
-					return $str;
-				break;
-			case 'unique'	:
-			case 'md5'		:
-
-						return md5(uniqid(mt_rand()));
-				break;
-			case 'encrypt'	:
-			case 'sha1'	:
-
-						$CI =& get_instance();
-						$CI->load->helper('security');
-
-						return do_hash(uniqid(mt_rand(), TRUE), 'sha1');
-				break;
+			case 'basic': return mt_rand();
+			case 'alnum':
+			case 'numeric':
+			case 'nozero':
+			case 'alpha':
+				switch ($type)
+				{
+					case 'alpha':	$pool = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ';
+						break;
+					case 'alnum':	$pool = '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ';
+						break;
+					case 'numeric':	$pool = '0123456789';
+						break;
+					case 'nozero':	$pool = '123456789';
+						break;
+				}
+				return substr(str_shuffle(str_repeat($pool, ceil($len/strlen($pool)))),0,$len);
+			case 'unique':
+			case 'md5': return md5(uniqid(mt_rand()));
+			case 'encrypt':
+			case 'sha1':
+				$CI =& get_instance();
+				$CI->load->helper('security');
+				return do_hash(uniqid(mt_rand(), TRUE), 'sha1');
 		}
 	}
 }
@@ -262,7 +245,6 @@
 function increment_string($str, $separator = '_', $first = 1)
 {
 	preg_match('/(.+)'.$separator.'([0-9]+)$/', $str, $match);
-
 	return isset($match[2]) ? $match[1].$separator.($match[2] + 1) : $str.$separator.$first;
 }
 
@@ -311,6 +293,5 @@
 	}
 }
 
-
 /* End of file string_helper.php */
-/* Location: ./system/helpers/string_helper.php */
\ No newline at end of file
+/* Location: ./system/helpers/string_helper.php */