Symfony 4, get the root path of the project from a custom class (not a controller class)

Question

In the src/Utils directory, I created a custom class Foo for various things. I\'m looking for a way to get the absolute root path of the symfony 4 project <

Answer 1

Without Kernel injection

config/services.yaml

services:
    _defaults:
        autowire: true
        autoconfigure: true
        bind:
            $projectDir: '%kernel.project_dir%'

....

class Foo
{
    private $projectDir;

    public function __construct(string $projectDir)
    {
        $this->projectDir = $projectDir;
    }
}