7 files changed, 13 insertions, 25 deletions

diff --git a/system/libraries/Cache/drivers/Cache_memcached.php b/system/libraries/Cache/drivers/Cache_memcached.php
index 8096b2650..246a7a264 100644
--- a/system/libraries/Cache/drivers/Cache_memcached.php
+++ b/system/libraries/Cache/drivers/Cache_memcached.php
@@ -182,11 +182,11 @@ class CI_Cache_memcached extends CI_Driver {
 			}
 		}
 
-		if (class_exists('Memcached'))
+		if (class_exists('Memcached', FALSE))
 		{
 			$this->_memcached = new Memcached();
 		}
-		elseif (class_exists('Memcache'))
+		elseif (class_exists('Memcache', FALSE))
 		{
 			$this->_memcached = new Memcache();
 		}
diff --git a/system/libraries/Email.php b/system/libraries/Email.php
index 0319ac5e7..daa38484b 100644
--- a/system/libraries/Email.php
+++ b/system/libraries/Email.php
@@ -94,7 +94,7 @@ class CI_Email {
 	 * @var	int
 	 */
 	public $smtp_timeout	= 5;
-	
+
 	/**
 	 * SMTP persistent connection
 	 *
@@ -408,7 +408,7 @@ class CI_Email {
 	}
 
 	// --------------------------------------------------------------------
-	
+
 	/**
 	 * Destructor - Releases Resources
 	 *
@@ -2021,7 +2021,7 @@ class CI_Email {
 		{
 			return TRUE;
 		}
-			
+
 		if (strpos($reply, '334') !== 0)
 		{
 			$this->_set_error_message('lang:email_failed_smtp_login', $reply);
diff --git a/system/libraries/Form_validation.php b/system/libraries/Form_validation.php
index 1ed50844c..172e799f6 100644
--- a/system/libraries/Form_validation.php
+++ b/system/libraries/Form_validation.php
@@ -836,21 +836,6 @@ class CI_Form_validation {
 	// --------------------------------------------------------------------
 
 	/**
-	 * Checks if the rule is present within the validator
-	 *
-	 * Permits you to check if a rule is present within the validator
-	 *
-	 * @param	string	the field name
-	 * @return	bool
-	 */
-	public function has_rule($field)
-	{
-		return isset($this->_field_data[$field]);
-	}
-
-	// --------------------------------------------------------------------
-
-	/**
 	 * Get the value from a form
 	 *
 	 * Permits you to repopulate a form field with the value it was submitted
diff --git a/system/libraries/Migration.php b/system/libraries/Migration.php
index b673e9cb7..cc6fe48f0 100644
--- a/system/libraries/Migration.php
+++ b/system/libraries/Migration.php
@@ -228,7 +228,7 @@ class CI_Migration {
 			$class = 'Migration_'.ucfirst(strtolower($this->_get_migration_name(basename($file, '.php'))));
 
 			// Validate the migration file structure
-			if ( ! class_exists($class))
+			if ( ! class_exists($class, FALSE))
 			{
 				$this->_error_string = sprintf($this->lang->line('migration_class_doesnt_exist'), $class);
 				return FALSE;
diff --git a/system/libraries/Session/drivers/Session_cookie.php b/system/libraries/Session/drivers/Session_cookie.php
index 11bb32fe0..0e8644102 100644
--- a/system/libraries/Session/drivers/Session_cookie.php
+++ b/system/libraries/Session/drivers/Session_cookie.php
@@ -494,7 +494,7 @@ class CI_Session_cookie extends CI_Session_driver {
 		$this->userdata = array(
 			'session_id'	=> $this->_make_sess_id(),
 			'ip_address'	=> $this->CI->input->ip_address(),
-			'user_agent'	=> substr($this->CI->input->user_agent(), 0, 120),
+			'user_agent'	=> trim(substr($this->CI->input->user_agent(), 0, 120)),
 			'last_activity'	=> $this->now,
 		);
 
@@ -602,6 +602,9 @@ class CI_Session_cookie extends CI_Session_driver {
 				$set['user_data'] = $this->_serialize($userdata);
 			}
 
+			// Reset query builder values.
+			$this->CI->db->reset_query();
+
 			// Run the update query
 			// Any time we change the session id, it gets updated immediately,
 			// so our where clause below is always safe
diff --git a/system/libraries/Upload.php b/system/libraries/Upload.php
index acd76b03b..1c14f99ed 100644
--- a/system/libraries/Upload.php
+++ b/system/libraries/Upload.php
@@ -1212,7 +1212,7 @@ class CI_Upload {
 		 * Notes:
 		 *	- the DIRECTORY_SEPARATOR comparison ensures that we're not on a Windows system
 		 *	- many system admins would disable the exec(), shell_exec(), popen() and similar functions
-		 *	  due to security concerns, hence the function_exists() checks
+		 *	  due to security concerns, hence the function_usable() checks
 		 */
 		if (DIRECTORY_SEPARATOR !== '\\')
 		{
@@ -1223,7 +1223,7 @@ class CI_Upload {
 			if (function_usable('exec'))
 			{
 				/* This might look confusing, as $mime is being populated with all of the output when set in the second parameter.
-				 * However, we only neeed the last line, which is the actual return value of exec(), and as such - it overwrites
+				 * However, we only need the last line, which is the actual return value of exec(), and as such - it overwrites
 				 * anything that could already be set for $mime previously. This effectively makes the second parameter a dummy
 				 * value, which is only put to allow us to get the return status code.
 				 */
diff --git a/system/libraries/Xmlrpcs.php b/system/libraries/Xmlrpcs.php
index d4524d230..d263d789d 100644
--- a/system/libraries/Xmlrpcs.php
+++ b/system/libraries/Xmlrpcs.php
@@ -31,7 +31,7 @@ if ( ! function_exists('xml_parser_create'))
 	show_error('Your PHP installation does not support XML');
 }
 
-if ( ! class_exists('CI_Xmlrpc'))
+if ( ! class_exists('CI_Xmlrpc', FALSE))
 {
 	show_error('You must load the Xmlrpc class before loading the Xmlrpcs class in order to create a server.');
 }