diff --git a/application/config/doctypes.php b/application/config/doctypes.php
index fe54202..b1a8959 100644
--- a/application/config/doctypes.php
+++ b/application/config/doctypes.php
@@ -26,19 +26,19 @@
  */
 
 $_doctypes = array(
-	'xhtml11'		=> '<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">',
+	'xhtml11'			=> '<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">',
 	'xhtml1-strict'		=> '<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">',
 	'xhtml1-trans'		=> '<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">',
 	'xhtml1-frame'		=> '<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Frameset//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-frameset.dtd">',
 	'xhtml-basic11'		=> '<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML Basic 1.1//EN" "http://www.w3.org/TR/xhtml-basic/xhtml-basic11.dtd">',
-	'html5'			=> '<!DOCTYPE html>',
+	'html5'				=> '<!DOCTYPE html>',
 	'html4-strict'		=> '<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">',
 	'html4-trans'		=> '<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">',
 	'html4-frame'		=> '<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Frameset//EN" "http://www.w3.org/TR/html4/frameset.dtd">',
-	'mathml1'		=> '<!DOCTYPE math SYSTEM "http://www.w3.org/Math/DTD/mathml1/mathml.dtd">',
-	'mathml2'		=> '<!DOCTYPE math PUBLIC "-//W3C//DTD MathML 2.0//EN" "http://www.w3.org/Math/DTD/mathml2/mathml2.dtd">',
-	'svg10'			=> '<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.0//EN" "http://www.w3.org/TR/2001/REC-SVG-20010904/DTD/svg10.dtd">',
-	'svg11'			=> '<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">',
+	'mathml1'			=> '<!DOCTYPE math SYSTEM "http://www.w3.org/Math/DTD/mathml1/mathml.dtd">',
+	'mathml2'			=> '<!DOCTYPE math PUBLIC "-//W3C//DTD MathML 2.0//EN" "http://www.w3.org/Math/DTD/mathml2/mathml2.dtd">',
+	'svg10'				=> '<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.0//EN" "http://www.w3.org/TR/2001/REC-SVG-20010904/DTD/svg10.dtd">',
+	'svg11'				=> '<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">',
 	'svg11-basic'		=> '<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1 Basic//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11-basic.dtd">',
 	'svg11-tiny'		=> '<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1 Tiny//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11-tiny.dtd">',
 	'xhtml-math-svg-xh'	=> '<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1 plus MathML 2.0 plus SVG 1.1//EN" "http://www.w3.org/2002/04/xhtml-math-svg/xhtml-math-svg.dtd">',
diff --git a/application/config/smileys.php b/application/config/smileys.php
index 4b25309..3c49c46 100644
--- a/application/config/smileys.php
+++ b/application/config/smileys.php
@@ -30,7 +30,7 @@
 | SMILEYS
 | -------------------------------------------------------------------
 | This file contains an array of smileys for use with the emoticon helper.
-| Individual images can be used to replace multiple simileys.  For example:
+| Individual images can be used to replace multiple smileys.  For example:
 | :-) and :) use the same image replacement.
 |
 | Please see user guide for more info:
@@ -84,7 +84,7 @@
 	':vampire:'		=>	array('vampire.gif',		'19',	'19',	'vampire'),
 	':snake:'		=>	array('snake.gif',			'19',	'19',	'snake'),
 	':exclaim:'		=>	array('exclaim.gif',		'19',	'19',	'excaim'),
-	':question:'	=>	array('question.gif',		'19',	'19',	'question') // no comma after last item
+	':question:'	=>	array('question.gif',		'19',	'19',	'question')
 
 );
 
diff --git a/application/config/user_agents.php b/application/config/user_agents.php
index 88ab063..0c86058 100644
--- a/application/config/user_agents.php
+++ b/application/config/user_agents.php
@@ -182,7 +182,7 @@
 	'operamini'		=> 'Opera Mini',
 	'opera mini'	=> 'Opera Mini',
 	'opera mobi'	=> 'Opera Mobile',
-	'fennec'	=> 'Firefox Mobile',
+	'fennec'		=> 'Firefox Mobile',
 
 	// Other
 	'digital paths'	=> 'Digital Paths',
diff --git a/index.php b/index.php
index f93cadb..3040ef0 100755
--- a/index.php
+++ b/index.php
@@ -77,7 +77,7 @@
  *---------------------------------------------------------------
  *
  * This variable must contain the name of your "system" folder.
- * Include the path if the folder is not in the same  directory
+ * Include the path if the folder is not in the same directory
  * as this file.
  */
 	$system_path = 'system';
diff --git a/system/core/Common.php b/system/core/Common.php
index b95a05d..28c6083 100644
--- a/system/core/Common.php
+++ b/system/core/Common.php
@@ -538,7 +538,7 @@
 
 		$server_protocol = isset($_SERVER['SERVER_PROTOCOL']) ? $_SERVER['SERVER_PROTOCOL'] : FALSE;
 
-		if (strpos(php_sapi_name(), 'cgi') === 0)
+		if (strpos(PHP_SAPI, 'cgi') === 0)
 		{
 			header('Status: '.$code.' '.$text, TRUE);
 		}
@@ -556,8 +556,8 @@
 	/**
 	 * Exception Handler
 	 *
-	 * This is the custom exception handler that is declaired at the top
-	 * of Codeigniter.php. The main reason we use this is to permit
+	 * This is the custom exception handler that is declared at the top
+	 * of CodeIgniter.php. The main reason we use this is to permit
 	 * PHP errors to be logged in our own log files since the user may
 	 * not have access to server logs. Since this function
 	 * effectively intercepts PHP errors, however, we also need
diff --git a/system/core/Input.php b/system/core/Input.php
index 0ef8112..1e67ce1 100644
--- a/system/core/Input.php
+++ b/system/core/Input.php
@@ -47,7 +47,7 @@
 	public $ip_address = FALSE;
 
 	/**
-	 * User agent strin
+	 * User agent string
 	 *
 	 * @var	string
 	 */
@@ -872,7 +872,7 @@
 	 */
 	public function is_cli_request()
 	{
-		return (php_sapi_name() === 'cli' OR defined('STDIN'));
+		return (PHP_SAPI === 'cli' OR defined('STDIN'));
 	}
 
 	// --------------------------------------------------------------------
diff --git a/system/core/Router.php b/system/core/Router.php
index 989ae54..0f7278a 100644
--- a/system/core/Router.php
+++ b/system/core/Router.php
@@ -351,10 +351,10 @@
 			return $this->_set_request(explode('/', $this->routes[$uri]));
 		}
 
-		// Loop through the route array looking for wild-cards
+		// Loop through the route array looking for wildcards
 		foreach ($this->routes as $key => $val)
 		{
-			// Convert wild-cards to RegEx
+			// Convert wildcards to RegEx
 			$key = str_replace(array(':any', ':num'), array('[^/]+', '[0-9]+'), $key);
 
 			// Does the RegEx match?
diff --git a/system/database/drivers/oci8/oci8_driver.php b/system/database/drivers/oci8/oci8_driver.php
index 93e62b4..020a3a4 100644
--- a/system/database/drivers/oci8/oci8_driver.php
+++ b/system/database/drivers/oci8/oci8_driver.php
@@ -18,7 +18,7 @@
  *
  * @package		CodeIgniter
  * @author		EllisLab Dev Team
- * @copyright   Copyright (c) 2008 - 2013, EllisLab, Inc. (http://ellislab.com/)
+ * @copyright	Copyright (c) 2008 - 2013, EllisLab, Inc. (http://ellislab.com/)
  * @license		http://opensource.org/licenses/OSL-3.0 Open Software License (OSL 3.0)
  * @link		http://codeigniter.com
  * @since		Version 1.0
diff --git a/system/database/drivers/oci8/oci8_result.php b/system/database/drivers/oci8/oci8_result.php
index fd1d287..ce09b62 100644
--- a/system/database/drivers/oci8/oci8_result.php
+++ b/system/database/drivers/oci8/oci8_result.php
@@ -18,7 +18,7 @@
  *
  * @package		CodeIgniter
  * @author		EllisLab Dev Team
- * @copyright   Copyright (c) 2008 - 2013, EllisLab, Inc. (http://ellislab.com/)
+ * @copyright	Copyright (c) 2008 - 2013, EllisLab, Inc. (http://ellislab.com/)
  * @license		http://opensource.org/licenses/OSL-3.0 Open Software License (OSL 3.0)
  * @link		http://codeigniter.com
  * @since		Version 1.0
diff --git a/system/libraries/Upload.php b/system/libraries/Upload.php
index 8542804..15eb74b 100644
--- a/system/libraries/Upload.php
+++ b/system/libraries/Upload.php
@@ -463,7 +463,7 @@
 		}
 
 		// Are the image dimensions within the allowed size?
-		// Note: This can fail if the server has an open_basdir restriction.
+		// Note: This can fail if the server has an open_basedir restriction.
 		if ( ! $this->is_allowed_dimensions())
 		{
 			$this->set_error('upload_invalid_dimensions');
diff --git a/user_guide_src/source/changelog.rst b/user_guide_src/source/changelog.rst
index 8b57987..a987c50 100644
--- a/user_guide_src/source/changelog.rst
+++ b/user_guide_src/source/changelog.rst
@@ -75,7 +75,7 @@
       - :php:func:`anchor_popup()` will now fill the *href* attribute with the URL and its JS code will return FALSE instead.
       - Added JS window name support to the :php:func:`anchor_popup()` function.
       - Added support (auto-detection) for HTTP/1.1 response code 303 in :php:func:`redirect()`.
-      - Changed :php:func:`redirect()` to only choose the **refresh** method only on IIS servers, instead of all servers on Windows (when **auto** is used).
+      - Changed :php:func:`redirect()` to choose the **refresh** method only on IIS servers, instead of all servers on Windows (when **auto** is used).
       - Changed :php:func:`anchor()`, :php:func:`anchor_popup()`, and :php:func:`redirect()` to support protocol-relative URLs (e.g. *//ellislab.com/codeigniter*).
       - Added an optional second parameter to both :php:func:`base_url()` and :php:func:`site_url()` that allows enforcing of a protocol different than the one in the *base_url* configuration setting.
 
@@ -515,7 +515,7 @@
 -  Fixed a bug (#784, #861) - :doc:`Database Forge <database/forge>` method ``create_table()`` used to accept constraints for MSSQL/SQLSRV integer-type columns.
 -  Fixed a bug (#706) - SQLSRV/MSSSQL didn't escape field names.
 -  Fixed a bug (#1452) - ``protect_identifiers()`` didn't properly detect identifiers with spaces in their names.
--  Fixed a bug where ``protect_identifiers()`` ignored it's extra arguments when the value passed to it is an array.
+-  Fixed a bug where ``protect_identifiers()`` ignored its extra arguments when the value passed to it is an array.
 -  Fixed a bug where ``_has_operator()`` didn't detect BETWEEN.
 -  Fixed a bug in :doc:`Query Builder <database/query_builder>`'s ``join()`` method where it failed with identifiers containing dashes.
 -  Fixed a bug (#1264) - :doc:`Database Forge <database/forge>` and :doc:`Database Utilities <database/utilities>` didn't update/reset the databases and tables list cache when a table or a database is created, dropped or renamed.
@@ -555,7 +555,7 @@
 -  Fixed a bug where the :doc:`Session Library <libraries/sessions>` accepted cookies with *last_activity* values being in the future.
 -  Fixed a bug (#1897) - :doc:`Email Library <libraries/email>` triggered PHP E_WARNING errors when *mail* protocol used and ``to()`` is never called.
 -  Fixed a bug (#1409) - :doc:`Email Library <libraries/email>` didn't properly handle multibyte characters when applying Q-encoding to headers.
--  Fixed a bug where :doc:`Email Library <libraries/email>` didn't honor it's *wordwrap* setting while handling alternative messages.
+-  Fixed a bug where :doc:`Email Library <libraries/email>` didn't honor its *wordwrap* setting while handling alternative messages.
 -  Fixed a bug (#1476, #1909) - :doc:`Pagination Library <libraries/pagination>` didn't take into account actual routing when determining the current page.
 -  Fixed a bug (#1766) - :doc:`Query Builder <database/query_builder>` didn't always take into account the *dbprefix* setting.
 -  Fixed a bug (#779) - :doc:`URI Class <libraries/uri>` didn't always trim slashes from the *uri_string* as shown in the documentation.
@@ -602,7 +602,7 @@
 -  Fixed a bug (#2490) - :doc:`Database Class <database/queries>` method ``query()`` returning boolean instead of a result object for PostgreSQL-specific *INSERT INTO ... RETURNING* statements.
 -  Fixed a bug (#249) - :doc:`Cache Library <libraries/caching>` didn't properly handle Memcache(d) configurations with missing options.
 -  Fixed a bug (#180) - :php:func:`config_item()` didn't take into account run-time configuration changes.
--  Fixed a bug (#2551) - :doc:`Loader Library <libraries/loader>` method ``library()`` didn't properly check if a class that is being loaded already exits.
+-  Fixed a bug (#2551) - :doc:`Loader Library <libraries/loader>` method ``library()`` didn't properly check if a class that is being loaded already exists.
 -  Fixed a bug (#2560) - :doc:`Form Helper <helpers/form_helper>` function :php:func:`form_open()` set the 'method="post"' attribute only if the passed attributes equaled an empty string.
 -  Fixed a bug (#2585) - :doc:`Query Builder <database/query_builder>` methods ``min()``, ``max()``, ``avg()``, ``sum()`` didn't escape field names.
 
@@ -684,7 +684,7 @@
 -  Fixed a bug (#538) - Windows paths were ignored when using the :doc:`Image Manipulation Library <libraries/image_lib>` to create a new file.
 -  Fixed a bug - When database caching was enabled, $this->db->query() checked the cache before binding variables which resulted in cached queries never being found.
 -  Fixed a bug - CSRF cookie value was allowed to be any (non-empty) string before being written to the output, making code injection a risk.
--  Fixed a bug (#726) - PDO put a 'dbname' argument in it's connection string regardless of the database platform in use, which made it impossible to use SQLite.
+-  Fixed a bug (#726) - PDO put a 'dbname' argument in its connection string regardless of the database platform in use, which made it impossible to use SQLite.
 -  Fixed a bug - ``CI_DB_pdo_driver::num_rows()`` was not returning properly value with SELECT queries, cause it was relying on ``PDOStatement::rowCount()``.
 -  Fixed a bug (#1059) - ``CI_Image_lib::clear()`` was not correctly clearing all necessary object properties, namely width and height.
 
diff --git a/user_guide_src/source/helpers/smiley_helper.rst b/user_guide_src/source/helpers/smiley_helper.rst
index 3925f8b..cfd52ff 100644
--- a/user_guide_src/source/helpers/smiley_helper.rst
+++ b/user_guide_src/source/helpers/smiley_helper.rst
@@ -17,7 +17,7 @@
 Overview
 ========
 
-The Smiley helper has a renderer that takes plain text simileys, like
+The Smiley helper has a renderer that takes plain text smileys, like
 :-) and turns them into a image representation, like |smile!|
 
 It also lets you display a set of smiley images that when clicked will
@@ -44,7 +44,7 @@
 --------------
 
 In your **application/controllers/** directory, create a file called
-smileys.php and place the code below in it.
+Smileys.php and place the code below in it.
 
 .. important:: Change the URL in the :php:func:`get_clickable_smileys()`
 	function below so that it points to your smiley folder.
@@ -156,7 +156,7 @@
 
 Example::
 
-	$str = 'Here are some simileys: :-)  ;-)';
+	$str = 'Here are some smileys: :-)  ;-)';
 	$str = parse_smileys($str, "http://example.com/images/smileys/");
 	echo $str;
 
diff --git a/user_guide_src/source/installation/upgrade_300.rst b/user_guide_src/source/installation/upgrade_300.rst
index 2e73ad1..8983558 100644
--- a/user_guide_src/source/installation/upgrade_300.rst
+++ b/user_guide_src/source/installation/upgrade_300.rst
@@ -207,7 +207,7 @@
 	// Produces DROP TABLE IF EXISTS `table_name`
 	$this->dbforge->drop_table('table_name', TRUE);
 
-.. note:: The given example users MySQL-specific syntax, but it should work across
+.. note:: The given example uses MySQL-specific syntax, but it should work across
 	all drivers with the exception of ODBC.
 
 ***********************************************************