php - Is it possible to intiailize variables in a constructor for a Laravel facade?

Solution:

Since a Facade uses static functions you could only do something like

public static $client = null;

public static function init() {
    if(self::$client == null)
        self::$client = new instanceOfObject();
}

// somewhere else
customFacade::init();
customFacade::client->send();
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Solution:

Laravel will resolve all the dependencies you need out of the service container, in the class constructor which underlies your facade. A toy example to show my point, will haveUserRepository resolved in theDateService, and therefore theDates facade.

Usage like,

    return view('profile' => [
        ...
        'time' => Dates::loggedLocal(),
        ...
    ]);
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DatetimeService.php

class DatetimeService
{
    private $userRepository;
    
    public function __construct(
        UserRepository $userRepository
    ) {
        $this->userRepository = $userRepository;
    }

    /**
     * Get the logged in users local time
     *
     * @return Carbon
     */
    public function loggedLocal() : Carbon
    {
        $user = $this->userRepository->current();
        return Carbon::now()->setTimezone($user->timezone);
    }
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Dates.php

class Dates extends Facade
{
    /**
     * Get the registered name of the component.
     *
     * @return string
     */
    protected static function getFacadeAccessor() { return 'date-service'; }
}
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DateServiceProvider.php

class DateServiceProvider extends ServiceProvider
{
    /**
     * Register any application services.
     *
     * @return void
     */
    public function register()
    {
        $this->app->singleton('date-service', function()
        {
            return new DateTimeService;
        });
    }
}
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