creating a Symfony project using composer - php

Question

I'm trying to get Symfony in my Mac, so I installed symfony and composer in order to start developing, but when I create the project I have some problems:
composer create-project symfony/skeleton cost_management
Installing symfony/skeleton (v4.0.5)
- Installing symfony/skeleton (v4.0.5): Loading from cache
Created project in cost_management
Loading composer repositories with package information
Updating dependencies (including require-dev)
Package operations: 21 installs, 0 updates, 0 removals
- Installing symfony/flex (v1.0.71): Loading from cache
- Installing symfony/polyfill-mbstring (v1.7.0): Loading from cache
- Installing symfony/console (v4.0.6): Loading from cache
- Installing symfony/routing (v4.0.6): Loading from cache
- Installing symfony/http-foundation (v4.0.6): Loading from cache
- Installing symfony/yaml (v4.0.6): Loading from cache
- Installing symfony/framework-bundle (v4.0.6): Loading from cache
- Installing symfony/http-kernel (v4.0.6): Loading from cache
- Installing symfony/event-dispatcher (v4.0.6): Loading from cache
- Installing psr/log (1.0.2): Loading from cache
- Installing symfony/debug (v4.0.6): Loading from cache
- Installing symfony/finder (v4.0.6): Loading from cache
- Installing symfony/filesystem (v4.0.6): Loading from cache
- Installing psr/container (1.0.0): Loading from cache
- Installing symfony/dependency-injection (v4.0.6): Loading from cache
- Installing symfony/config (v4.0.6): Loading from cache
- Installing psr/simple-cache (1.0.1): Loading from cache
- Installing psr/cache (1.0.1): Loading from cache
- Installing symfony/cache (v4.0.6): Loading from cache
- Installing symfony/dotenv (v4.0.6): Loading from cache
Writing lock file
Generating autoload files
Symfony operations: 4 recipes (7c280e93acfad83db0b06dac8600cc2d)
- Configuring symfony/flex (>=1.0): From github.com/symfony/recipes:master
- Configuring symfony/framework-bundle (>=3.3): From github.com/symfony/recipes:master
- Configuring symfony/console (>=3.3): From github.com/symfony/recipes:master
- Configuring symfony/routing (>=4.0): From github.com/symfony/recipes:master
Executing script cache:clear [KO]
[KO]
Script cache:clear returned with error code 255
!!
!! Fatal error: Uncaught Symfony\Component\Debug\Exception\ClassNotFoundException: Attempted to load class "FileResource" from namespace "App".
!! Did you forget a "use" statement for "Symfony\Component\Config\Resource\FileResource"? in /Users/gate11/Desktop/cost_management/src/Kernel.php:39
!! Stack trace:
!! #0 /Users/gate11/Desktop/cost_management/vendor/symfony/framework-bundle/Kernel/MicroKernelTrait.php(80): App\Kernel->configureContainer(Object(Symfony\Component\DependencyInjection\ContainerBuilder), Object(Symfony\Component\Config\Loader\DelegatingLoader))
!! #1 [internal function]: App\Kernel->Symfony\Bundle\FrameworkBundle\Kernel\{closure}(Object(Symfony\Component\DependencyInjection\ContainerBuilder))
!! #2 /Users/gate11/Desktop/cost_management/vendor/symfony/dependency-injection/Loader/ClosureLoader.php(38): call_user_func(Object(Closure), Object(Symfony\Component\DependencyInjection\ContainerBuilder))
!! #3 /Users/gate11/Desktop/cost_management/vendor/symfony/config/Loader/DelegatingLoader.php(40): Symfony\Component\DependencyInj in /Users/gate11/Desktop/cost_management/src/Kernel.php on line 39
!! PHP Fatal error: Uncaught Symfony\Component\Debug\Exception\ClassNotFoundException: Attempted to load class "FileResource" from namespace "App".
!! Did you forget a "use" statement for "Symfony\Component\Config\Resource\FileResource"? in /Users/gate11/Desktop/cost_management/src/Kernel.php:39
!! Stack trace:
!! #0 /Users/gate11/Desktop/cost_management/vendor/symfony/framework-bundle/Kernel/MicroKernelTrait.php(80): App\Kernel->configureContainer(Object(Symfony\Component\DependencyInjection\ContainerBuilder), Object(Symfony\Component\Config\Loader\DelegatingLoader))
!! #1 [internal function]: App\Kernel->Symfony\Bundle\FrameworkBundle\Kernel\{closure}(Object(Symfony\Component\DependencyInjection\ContainerBuilder))
!! #2 /Users/gate11/Desktop/cost_management/vendor/symfony/dependency-injection/Loader/ClosureLoader.php(38): call_user_func(Object(Closure), Object(Symfony\Component\DependencyInjection\ContainerBuilder))
!! #3 /Users/gate11/Desktop/cost_management/vendor/symfony/config/Loader/DelegatingLoader.php(40): Symfony\Component\DependencyInj in /Users/gate11/Desktop/cost_management/src/Kernel.php on line 39
!!
I tried many ways to install it, I saw the commands in their website, so I did it but still having some problems installing it.
If someone knows what's wrong with it, or if I need something else, I'm hoping for your help.
Thanks.

Answer 1

Please replace composer create-project symfony/skeleton cost_management with composer create-project symfony/website-skeleton cost_management
**OR**
You could install and setup Symfony4 application on Ubuntu with PHP7.2 by these steps execute through temminal:
composer create-project symfony/website-skeleton cost_management
cd cost_management
php -S 127.0.0.1:8000 -t public
ctrl + c to exit server run composer install
sudo chmod 777 -R var/cache/ var/log/
now again php -S 127.0.0.1:8000 -t public
Now you can check on your browser by this http://localhost:8000/ or directly you can access without server run by http://localhost/project_directory/public/index.php
Note:-
1. By default symfony 4 is set to dev environment, but you could set
your environment by setting $_SERVER['APP_ENV']
2. If it's working proper then you will see a 404 error message and profiler in bottom because it's by default set to dev mode.
3. To see something you need to create your first controller by following documents Symfony 4 create your first page

Answer 2

Just add this:
use Symfony\Component\Config\Resource\FileResource;
to the top of your src/Kernel.php, it was missed for some reason.
After that, you can continue with composer install