diff --git a/extensions/faker/FixtureController.php b/extensions/faker/FixtureController.php
index 2864813666..cff1b71953 100644
--- a/extensions/faker/FixtureController.php
+++ b/extensions/faker/FixtureController.php
@@ -233,8 +233,9 @@ class FixtureController extends \yii\console\controllers\FixtureController
 			}
 
 			$content = $this->exportFixtures($fixtures);
-			file_put_contents($fixturePath . '/' . $fixtureFileName, $content);
-			$this->stdout("Fixture file was generated under: " . realpath($fixturePath . "/" . $fixtureFileName) . "\n", Console::FG_GREEN);
+			$filePath = realpath($fixturePath . '/' . $fixtureFileName);
+			file_put_contents($filePath, $content);
+			$this->stdout("Fixture file was generated under: $filePath\n", Console::FG_GREEN);
 		}
 	}
 
@@ -356,9 +357,9 @@ class FixtureController extends \yii\console\controllers\FixtureController
 	public function confirmGeneration($files)
 	{
 		$this->stdout("Fixtures will be generated under the path: \n", Console::FG_YELLOW);
-		$this->stdout(realpath(Yii::getAlias($this->fixturePath, false)) . "\n\n", Console::FG_GREEN);
+		$this->stdout(realpath(Yii::getAlias($this->fixturePath)) . "\n\n", Console::FG_GREEN);
 		$this->stdout("Templates will be taken from path: \n", Console::FG_YELLOW);
-		$this->stdout(realpath(Yii::getAlias($this->templatePath, false)) . "\n\n", Console::FG_GREEN);
+		$this->stdout(realpath(Yii::getAlias($this->templatePath)) . "\n\n", Console::FG_GREEN);
 
 		foreach ($files as $index => $fileName) {
 			$this->stdout("    " . ($index + 1) . ". " . basename($fileName) . "\n", Console::FG_GREEN);
diff --git a/framework/base/Request.php b/framework/base/Request.php
index cd3ffdc9f4..b76886ed4a 100644
--- a/framework/base/Request.php
+++ b/framework/base/Request.php
@@ -6,6 +6,7 @@
  */
 
 namespace yii\base;
+use Yii;
 
 /**
  * Request represents a request that is handled by an [[Application]].
@@ -72,7 +73,7 @@ abstract class Request extends Component
 	 */
 	public function setScriptFile($value)
 	{
-		$scriptFile = realpath(\Yii::getAlias($value));
+		$scriptFile = realpath(Yii::getAlias($value));
 		if ($scriptFile !== false && is_file($scriptFile)) {
 			$this->_scriptFile = $scriptFile;
 		} else {
diff --git a/framework/web/AssetManager.php b/framework/web/AssetManager.php
index 89e746e1f0..b8f7dfa007 100644
--- a/framework/web/AssetManager.php
+++ b/framework/web/AssetManager.php
@@ -227,8 +227,7 @@ class AssetManager extends Component
 			return $this->_published[$path];
 		}
 
-		$src = realpath($path);
-		if ($src === false) {
+		if (!is_string($path) || ($src = realpath($path)) === false) {
 			throw new InvalidParamException("The file or directory to be published does not exist: $path");
 		}
 
@@ -295,7 +294,7 @@ class AssetManager extends Component
 		if (isset($this->_published[$path])) {
 			return $this->_published[$path][0];
 		}
-		if (($path = realpath($path)) !== false) {
+		if (is_string($path) && ($path = realpath($path)) !== false) {
 			$base = $this->basePath . DIRECTORY_SEPARATOR;
 			if (is_file($path)) {
 				return $base . $this->hash(dirname($path) . filemtime($path)) . DIRECTORY_SEPARATOR . basename($path);
@@ -319,7 +318,7 @@ class AssetManager extends Component
 		if (isset($this->_published[$path])) {
 			return $this->_published[$path][1];
 		}
-		if (($path = realpath($path)) !== false) {
+		if (is_string($path) && ($path = realpath($path)) !== false) {
 			if (is_file($path)) {
 				return $this->baseUrl . '/' . $this->hash(dirname($path) . filemtime($path)) . '/' . basename($path);
 			} else {