> Le 26 févr. 2021 à 09:16, Manuel Canga <p...@manuelcanga.dev> a écrit :
>
> Hello, another example with "factories method"[1]:
>
> ```php
> use MyProject\Framework;
>
> abstract class AbstractController {
> private const HELPER_PATH = static::namespace.'/Helpers';
> private const SERVICE_PATH = static::namespace.'/Services';
>
> public function instanceHelper( string $helperClass ) {
> $helperClassName = self::HELPER_PATH."/{$helperClass}";
>
> return new $helperClassName();
> }
>
> public function instanceService( string $serviceClass ) {
> $serviceClassName = self::SERVICE_PATH."/{$serviceClass}";
>
> return new $serviceClassName();
> }
> }
>
> use MyProject\MyModule;
>
> class Controller {
> public function __invoke() {
> //......
> $date = $this->instanceHelper('Date');
> //...
> }
>
> }
> ```
>
> [1]: https://en.wikipedia.org/wiki/Factory_method_pattern
>
> Regards
> --
> Manuel Canga
>
> Zend Certified PHP Engineer
> Websites: https://manuelcanga.dev | https://trasweb.net
> Linkedin: https://es.linkedin.com/in/manuelcanga
>
> --
> PHP Internals - PHP Runtime Development Mailing List
> To unsubscribe, visit: https://www.php.net/unsub.php
Hi,
Note that (typos aside) this example cannot work as-is, because
`static::namespace` (like `static::class`) cannot be resolved at compile-time,
and therefore cannot be assigned to a constant.
More generally, in the various examples you provided, the namespace is not
resolved at compile-time: it is either static::namespace or
$fullClassName::namespace where $fullClassName is provided by the autoloader.
As such, instead of a ::namespace magic class constant, it might be more
appropriate to have a helper function, say `get_namespace()`, which has the
additional benefit to work not only on (fully qualified) class names, but also
on function, constant and namespace names (in the case of namespace names, it
would return the name of the parent namespace).
—Claude
--
PHP Internals - PHP Runtime Development Mailing List
To unsubscribe, visit: https://www.php.net/unsub.php
