diff --git a/addons/captcha/captcha.addon.php b/addons/captcha/captcha.addon.php
index f570247041..c863d36ade 100644
--- a/addons/captcha/captcha.addon.php
+++ b/addons/captcha/captcha.addon.php
@@ -190,7 +190,7 @@ function createCaptchaImage($string)
 			// Create an image for each letter
 			foreach($arr as $i => $str)
 			{
-				$im[$i + 1] = @imagecreate($w, $h);
+				$im[$i + 1] = imagecreate($w, $h);
 				$background_color = imagecolorallocate($im[$i + 1], 255, 255, 255);
 				$text_color = imagecolorallocate($im[$i + 1], 0, 0, 0);
 
diff --git a/classes/db/DB.class.php b/classes/db/DB.class.php
index 25a7cdb102..35603265bc 100644
--- a/classes/db/DB.class.php
+++ b/classes/db/DB.class.php
@@ -344,7 +344,7 @@ function _getSupportedList()
 		}
 
 		// sort
-		@usort($get_supported_list, array($this, '_sortDBMS'));
+		usort($get_supported_list, array($this, '_sortDBMS'));
 
 		$this->supported_list = $get_supported_list;
 		return $this->supported_list;
diff --git a/classes/db/DBMysql.class.php b/classes/db/DBMysql.class.php
index 35a0d1ec1e..3124e6b793 100644
--- a/classes/db/DBMysql.class.php
+++ b/classes/db/DBMysql.class.php
@@ -73,7 +73,7 @@ function __connect($connection)
 		}
 
 		// Attempt to connect
-		$result = @mysql_connect($connection["db_hostname"], $connection["db_userid"], $connection["db_password"]);
+		$result = mysql_connect($connection["db_hostname"], $connection["db_userid"], $connection["db_password"]);
 		if(!$result)
 		{
 			exit('XE cannot connect to DB.');
@@ -91,7 +91,11 @@ function __connect($connection)
 			return;
 		}
 		// select db
-		@mysql_select_db($connection["db_database"], $result);
+		$output = mysql_select_db($connection["db_database"], $result);
+		if(!$output)
+		{
+			exit('XE cannot select database.');
+		}
 		if(mysql_error())
 		{
 			$this->setError(mysql_errno(), mysql_error());
@@ -121,7 +125,7 @@ function _afterConnect($connection)
 	 */
 	function _close($connection)
 	{
-		@mysql_close($connection);
+		mysql_close($connection);
 	}
 
 	/**
diff --git a/classes/display/HTMLDisplayHandler.php b/classes/display/HTMLDisplayHandler.php
index 809c74d130..ca788e29a0 100644
--- a/classes/display/HTMLDisplayHandler.php
+++ b/classes/display/HTMLDisplayHandler.php
@@ -287,7 +287,7 @@ function _preserveValue($match)
 			case 'radio':
 			case 'checkbox':
 				$str = preg_replace('@\schecked(="[^"]*?")?@', ' ', $str);
-				if(@preg_match('@\s(?i:value)="' . $INPUT_ERROR[$match[3]] . '"@', $str))
+				if(preg_match('@\s(?i:value)="' . $INPUT_ERROR[$match[3]] . '"@', $str))
 				{
 					$str .= ' checked="checked"';
 				}
diff --git a/classes/file/FileHandler.class.php b/classes/file/FileHandler.class.php
index 29d94eb7f0..6901d830dc 100644
--- a/classes/file/FileHandler.class.php
+++ b/classes/file/FileHandler.class.php
@@ -79,13 +79,13 @@ function copyDir($source_dir, $target_dir, $filter = null, $type = null)
 			{
 				if($type == 'force')
 				{
-					@unlink($target_dir . $file);
+					unlink($target_dir . $file);
 				}
 				else
 				{
 					if(!file_exists($target_dir . $file))
 					{
-						@copy($source_dir . $file, $target_dir . $file);
+						copy($source_dir . $file, $target_dir . $file);
 					}
 				}
 			}
@@ -112,10 +112,10 @@ function copyFile($source, $target, $force = 'Y')
 
 		if($force == 'Y')
 		{
-			@unlink($target_dir . DIRECTORY_SEPARATOR . $target);
+			unlink($target_dir . DIRECTORY_SEPARATOR . $target);
 		}
 
-		@copy($source, $target_dir . DIRECTORY_SEPARATOR . $target);
+		copy($source, $target_dir . DIRECTORY_SEPARATOR . $target);
 	}
 
 	/**
@@ -126,12 +126,12 @@ function copyFile($source, $target, $force = 'Y')
 	 */
 	function readFile($filename)
 	{
-		if(($filename = self::exists($filename)) === FALSE || filesize($filename) < 1)
+		if(!is_readable($filename) || filesize($filename) < 1)
 		{
 			return;
 		}
 
-		return @file_get_contents($filename);
+		return file_get_contents($filename);
 	}
 
 	/**
@@ -154,8 +154,8 @@ function writeFile($filename, $buff, $mode = "w")
 			$flags = FILE_APPEND;
 		}
 
-		@file_put_contents($filename, $buff, $flags|LOCK_EX);
-		@chmod($filename, 0644);
+		file_put_contents($filename, $buff, $flags|LOCK_EX);
+		chmod($filename, 0644);
 	}
 
 	/**
@@ -180,7 +180,7 @@ function removeFile($filename)
 	 */
 	function rename($source, $target)
 	{
-		return @rename(self::getRealPath($source), self::getRealPath($target));
+		return rename(self::getRealPath($source), self::getRealPath($target));
 	}
 
 	/**
@@ -286,8 +286,8 @@ function makeDir($path_string)
 
 		if(!ini_get('safe_mode'))
 		{
-			@mkdir($path_string, 0755, TRUE);
-			@chmod($path_string, 0755);
+			mkdir($path_string, 0755, TRUE);
+			chmod($path_string, 0755);
 		}
 		// if safe_mode is on, use FTP
 		else
@@ -775,27 +775,27 @@ function createImageFile($source_file, $target_file, $resize_width = 0, $resize_
 			case 'gif' :
 				if(function_exists('imagecreatefromgif'))
 				{
-					$source = @imagecreatefromgif($source_file);
+					$source = imagecreatefromgif($source_file);
 				}
 				break;
 			case 'jpeg' :
 			case 'jpg' :
 				if(function_exists('imagecreatefromjpeg'))
 				{
-					$source = @imagecreatefromjpeg($source_file);
+					$source = imagecreatefromjpeg($source_file);
 				}
 				break;
 			case 'png' :
 				if(function_exists('imagecreatefrompng'))
 				{
-					$source = @imagecreatefrompng($source_file);
+					$source = imagecreatefrompng($source_file);
 				}
 				break;
 			case 'wbmp' :
 			case 'bmp' :
 				if(function_exists('imagecreatefromwbmp'))
 				{
-					$source = @imagecreatefromwbmp($source_file);
+					$source = imagecreatefromwbmp($source_file);
 				}
 				break;
 		}
@@ -869,7 +869,7 @@ function createImageFile($source_file, $target_file, $resize_width = 0, $resize_
 		{
 			return FALSE;
 		}
-		@chmod($target_file, 0644);
+		chmod($target_file, 0644);
 
 		return TRUE;
 	}
diff --git a/classes/module/ModuleHandler.class.php b/classes/module/ModuleHandler.class.php
index 569997d253..047bb5a9e0 100644
--- a/classes/module/ModuleHandler.class.php
+++ b/classes/module/ModuleHandler.class.php
@@ -908,7 +908,7 @@ function displayContent($oModule = NULL)
 								$oMenuAdminController = getAdminController('menu');
 								$homeMenuCacheFile = $oMenuAdminController->getHomeMenuCacheFile();
 
-								if(FileHandler::exists($homeMenuCacheFile))
+								if(is_readable($homeMenuCacheFile))
 								{
 									include($homeMenuCacheFile);
 								}
@@ -1069,7 +1069,7 @@ function &getModuleInstance($module, $type = 'view', $kind = '')
 			if(!isset($GLOBALS['_called_constructor'][$instance_name]))
 			{
 				$GLOBALS['_called_constructor'][$instance_name] = TRUE;
-				if(@method_exists($oModule, $instance_name))
+				if(method_exists($oModule, $instance_name))
 				{
 					$oModule->{$instance_name}();
 				}
diff --git a/classes/module/ModuleObject.class.php b/classes/module/ModuleObject.class.php
index 73bef5c4bd..fe8b6d79ff 100644
--- a/classes/module/ModuleObject.class.php
+++ b/classes/module/ModuleObject.class.php
@@ -401,7 +401,7 @@ function proc()
 		$called_position = 'before_module_proc';
 		$oAddonController = getController('addon');
 		$addon_file = $oAddonController->getCacheFilePath(Mobile::isFromMobilePhone() ? "mobile" : "pc");
-		if(FileHandler::exists($addon_file)) include($addon_file);
+		if(is_readable($addon_file)) include($addon_file);
 
 		if(isset($this->xml_info->action->{$this->act}) && method_exists($this, $this->act))
 		{
@@ -460,7 +460,7 @@ function proc()
 		$called_position = 'after_module_proc';
 		$oAddonController = getController('addon');
 		$addon_file = $oAddonController->getCacheFilePath(Mobile::isFromMobilePhone() ? "mobile" : "pc");
-		if(FileHandler::exists($addon_file)) include($addon_file);
+		if(is_readable($addon_file)) include($addon_file);
 
 		if(is_a($output, 'Object') || is_subclass_of($output, 'Object'))
 		{
diff --git a/modules/addon/addon.controller.php b/modules/addon/addon.controller.php
index 1405b3ad95..8a8bb2d54f 100644
--- a/modules/addon/addon.controller.php
+++ b/modules/addon/addon.controller.php
@@ -117,7 +117,7 @@ function makeCacheFile($site_srl = 0, $type = "pc", $gtype = 'site')
 				unset($extra_vars);
 				$extra_vars = base64_encode($val->extra_vars);
 			}
-			$addon_include = sprintf('unset($addon_info); $addon_info = unserialize(base64_decode(\'%s\')); @include($addon_file);', $extra_vars);
+			$addon_include = sprintf('unset($addon_info); $addon_info = unserialize(base64_decode(\'%s\')); include($addon_file);', $extra_vars);
 
 			$buff[] = 'if(file_exists($addon_file)){';
 			$buff[] = 'if($rm === \'no_run_selected\'){';
diff --git a/modules/admin/admin.admin.controller.php b/modules/admin/admin.admin.controller.php
index 6e1d09f3b6..d050fe76d8 100644
--- a/modules/admin/admin.admin.controller.php
+++ b/modules/admin/admin.admin.controller.php
@@ -471,7 +471,7 @@ function procAdminRemoveIcons()
 		$file_exist = FileHandler::readFile(_XE_PATH_ . 'files/attach/xeicon/' . $iconname);
 		if($file_exist)
 		{
-			@FileHandler::removeFile(_XE_PATH_ . 'files/attach/xeicon/' . $iconname);
+			FileHandler::removeFile(_XE_PATH_ . 'files/attach/xeicon/' . $iconname);
 		}
 		else
 		{
diff --git a/modules/menu/menu.admin.controller.php b/modules/menu/menu.admin.controller.php
index 80506acf4a..2265050392 100644
--- a/modules/menu/menu.admin.controller.php
+++ b/modules/menu/menu.admin.controller.php
@@ -259,12 +259,12 @@ function procMenuAdminDelete()
 			return new Object(-1, 'msg_adminmenu_cannot_delete');
 
 		// get menu properies with child menu
-		$phpFile = sprintf("./files/cache/menu/%s.php", $menu_srl);
+		$phpFile = FileHandler::getRealPath(sprintf("./files/cache/menu/%s.php", $menu_srl));
 		$originMenu = NULL;
 
-		if(is_readable(FileHandler::getRealPath($phpFile)))
+		if(is_readable($phpFile))
 		{
-			include(FileHandler::getRealPath($phpFile));
+			include($phpFile);
 		}
 
 		// check home menu in originMenu
@@ -860,12 +860,12 @@ public function deleteItem($args)
 		if($itemInfo->parent_srl) $parent_srl = $itemInfo->parent_srl;
 
 		// get menu properies with child menu
-		$phpFile = sprintf("./files/cache/menu/%s.php", $args->menu_srl);
+		$phpFile = FileHandler::getRealPath(sprintf("./files/cache/menu/%s.php", $args->menu_srl));
 		$originMenu = NULL;
 
-		if(is_readable(FileHandler::getRealPath($phpFile)))
+		if(is_readable($phpFile))
 		{
-			include(FileHandler::getRealPath($phpFile));
+			include($phpFile);
 
 			if(is_array($menu->list))
 			{
@@ -1012,12 +1012,12 @@ function procMenuAdminMoveItem()
 		}
 
 		// get menu properies with child menu
-		$phpFile = sprintf(_XE_PATH_ . "files/cache/menu/%s.php", $originalItemInfo->menu_srl);
+		$phpFile = FileHandler::getRealPath(sprintf(_XE_PATH_ . "files/cache/menu/%s.php", $originalItemInfo->menu_srl));
 		$originMenu = NULL;
 
-		if(is_readable(FileHandler::getRealPath($phpFile)))
+		if(is_readable($phpFile))
 		{
-			include(FileHandler::getRealPath($phpFile));
+			include($phpFile);
 
 			if(is_array($menu->list))
 			{
diff --git a/modules/menu/menu.mobile.php b/modules/menu/menu.mobile.php
index c57832185d..6a64a6a681 100644
--- a/modules/menu/menu.mobile.php
+++ b/modules/menu/menu.mobile.php
@@ -50,14 +50,14 @@ function dispMenuMenu()
 			$oMenuAdminController = getAdminController('menu');
 			$homeMenuCacheFile = $oMenuAdminController->getHomeMenuCacheFile();
 
-			if(file_exists($homeMenuCacheFile))
+			if(is_readable($homeMenuCacheFile))
 			{
-				@include($homeMenuCacheFile);
+				include($homeMenuCacheFile);
 			}
 			$menu_info->php_file = './files/cache/menu/'.$homeMenuSrl.'.php';
 		}
 
-		if(file_exists($menu_info->php_file)) @include($menu_info->php_file);
+		if(is_readable($menu_info->php_file)) include($menu_info->php_file);
 		if(is_array($menu->list))
 		{
 			foreach($menu->list as $menu_item)
diff --git a/modules/page/page.view.php b/modules/page/page.view.php
index c07a501244..27cd76e6bb 100644
--- a/modules/page/page.view.php
+++ b/modules/page/page.view.php
@@ -171,7 +171,8 @@ function getHtmlPage($path, $caching_interval, $cache_file)
 	function executeFile($target_file, $caching_interval, $cache_file)
 	{
 		// Cancel if the file doesn't exist
-		if(!file_exists(FileHandler::getRealPath($target_file))) return;
+		$target_file = FileHandler::getRealPath($target_file);
+		if(!is_readable($target_file)) return;
 
 		// Get a path and filename
 		$tmp_path = explode('/',$cache_file);
@@ -186,7 +187,7 @@ function executeFile($target_file, $caching_interval, $cache_file)
 
 			// Read a target file and get content
 			ob_start();
-			include(FileHandler::getRealPath($target_file));
+			include($target_file);
 			$content = ob_get_clean();
 			// Replace relative path to the absolute path 
 			$this->path = str_replace('\\', '/', realpath(dirname($target_file))) . '/';
diff --git a/modules/widget/widget.model.php b/modules/widget/widget.model.php
index 667fe0300b..066b598a26 100644
--- a/modules/widget/widget.model.php
+++ b/modules/widget/widget.model.php
@@ -131,9 +131,9 @@ function getWidgetInfo($widget)
 		// If the problem by comparing the cache file and include the return variable $widget_info
 		$cache_file = sprintf(_XE_PATH_ . 'files/cache/widget/%s.%s.cache.php', $widget, Context::getLangType());
 
-		if(file_exists($cache_file)&&filemtime($cache_file)>filemtime($xml_file))
+		if(is_readable($cache_file)&&filemtime($cache_file)>filemtime($xml_file))
 		{
-			@include($cache_file);
+			include($cache_file);
 			return $widget_info;
 		}
 		// If no cache file exists, parse the xml and then return the variable.
@@ -247,7 +247,7 @@ function getWidgetInfo($widget)
 		$buff = '<?php if(!defined("__XE__")) exit(); '.$buff.' ?>';
 		FileHandler::writeFile($cache_file, $buff);
 
-		if(file_exists($cache_file)) @include($cache_file);
+		if(is_readable($cache_file)) include($cache_file);
 		return $widget_info;
 	}
 
@@ -264,9 +264,9 @@ function getWidgetStyleInfo($widgetStyle)
 		// If the problem by comparing the cache file and include the return variable $widgetStyle_info
 		$cache_file = sprintf(_XE_PATH_ . 'files/cache/widgetstyles/%s.%s.cache.php', $widgetStyle, Context::getLangType());
 
-		if(file_exists($cache_file)&&filemtime($cache_file)>filemtime($xml_file))
+		if(is_readable($cache_file)&&filemtime($cache_file)>filemtime($xml_file))
 		{
-			@include($cache_file);
+			include($cache_file);
 			return $widgetStyle_info;
 		}
 		// If no cache file exists, parse the xml and then return the variable.
@@ -352,7 +352,7 @@ function getWidgetStyleInfo($widgetStyle)
 		$buff = '<?php if(!defined("__XE__")) exit(); '.$buff.' ?>';
 		FileHandler::writeFile($cache_file, $buff);
 
-		if(file_exists($cache_file)) @include($cache_file);
+		if(is_readable($cache_file)) include($cache_file);
 		return $widgetStyle_info;
 	}
 }