return direct reference to static function in PHP

Question

Now to return reference to static function I return reference to closure (inside boot function). Closure just calls static function.

class AuthServiceProvider extends ServiceProvider
{
    private static function createEloquentLdapProvider($app) {...}

    public function boot()
    {
        Auth::extend('databaseLdapCredentials', function($app) {
            return self::createDatabaseLdapProvider($app);
        });
    });
}

In C# I can return direct reference to static function by the name. I try to use function name in PHP also:

    public function boot()
    {
        Auth::extend('databaseLdapCredentials', self::createDatabaseLdapProvider);
    });

But it does not works. PHP thinks that self::createDatabaseLdapProvider is static variable (not reference to static function).

So how I can return direct reference to static function in PHP and do not use closure, that is crutch in this case?

Answer 1

我认为您有一个错误，必须将$ this用作：

return this->createDatabaseLdapProvider($app);