Using the path parameter in the path method.

config/cache.php

@@ -44,7 +44,7 @@ return [
 
         'file' => [
             'driver' => 'file',
-            'path'   => storage_path().'/framework/cache',
+            'path'   => storage_path('framework/cache'),
         ],
 
         'memcached' => [

config/database.php

@@ -48,7 +48,7 @@ return [
 
         'sqlite' => [
             'driver'   => 'sqlite',
-            'database' => storage_path().'/database.sqlite',
+            'database' => storage_path('database.sqlite'),
             'prefix'   => '',
         ],
 

config/filesystems.php

@@ -45,7 +45,7 @@ return [
 
         'local' => [
             'driver' => 'local',
-            'root'   => storage_path().'/app',
+            'root'   => storage_path('app'),
         ],
 
         'ftp' => [

config/session.php

@@ -57,7 +57,7 @@ return [
     |
     */
 
-    'files' => storage_path().'/framework/sessions',
+    'files' => storage_path('framework/sessions'),
 
     /*
     |--------------------------------------------------------------------------

config/view.php

@@ -28,6 +28,6 @@ return [
     |
     */
 
-    'compiled' => realpath(storage_path().'/framework/views'),
+    'compiled' => realpath(storage_path('framework/views')),
 
 ];