How to get the `public` dir from symfony controller?

@elisha_langworth 

You can get the public directory path from a Symfony controller using the following steps:

1. Inject the KernelInterface dependency in your controller constructor or as a method argument.

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use SymfonyComponentHttpKernelKernelInterface;

...

private $kernel;

public function __construct(KernelInterface $kernel)
{
    $this->kernel = $kernel;
}

1. Use the getRootDir() method of the KernelInterface to get the Symfony application root directory.

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$rootDir = $this->kernel->getRootDir();

1. Concatenate the public directory path with the root directory path to get the absolute path to the public directory.

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$publicDir = $rootDir . '/../public';

Now you can use the $publicDir variable to access files in the public directory from your controller. For example, you can create file paths or URLs to assets like CSS, JavaScript, or image files.