On 17/03/2013, at 8:33 AM, Daniele Orlando <dnl.r...@gmail.com> wrote:
> Hi List,
>
> I'm interested in proposing an RFC and I would know your opinion.
>
> === Current Situation ===
> Since PHP 5.3 we can use an object instance, who defines the __invoke()
> method, as a callable object.
> Example:
>
> // PHP Code.
> class Runnable
> {
> public function __invoke()
> {
> echo "Runned";
> }
> }
>
> $r = new Runnable();
> $r();
>
> // Output
> Runned
>
> === The Idea ===
> In Python, when you construct an object, you don't need to use the "new"
> keyword but you just invoke the class name followed by "()", like the class
> is a function.
> Example:
>
> // Python Code.
> class A:
> pass
>
> A()
>
> // Output.
> <__main__.A instance at %address>
>
> Now, would be interesting to extend the PHP __invoke() method adding an
> __invokeStatic() method, like happens with __call() and __callStatic()
> methods.
> In this way could be possible to use a class name to invoke the
> __invokeStatic() method.
> Example:
>
> // PHP Code.
> class TrueRunnable
> {
> public static function __invokeStatic()
> {
> echo "Runned";
> }
> }
>
> TrueRunnable();
>
> // Output.
> Runned
>
> But the possibility are endless:
>
> class A
> {
> public static function __invokeStatic()
> {
> return new A();
> }
> public method m() {}
> }
>
> A()->m();
>
> // or
>
> class A
> {
> private $_instance;
> public static function __invokeStatic()
> {
> // Singleton pattern.
> if (self::$_instance) {
> return self::$_instance;
> }
>
> return self::$_instance = new A();
> }
> public method m() {}
> }
>
> A()->m();
>
>
> === Conclusion ===
> This feature makes the __invoke() method consistent with the __call() and
> __callStatic() methods,
> and opens the door to many cool stuff.
>
> Any feedback is appreciated.
>
> Daniele Orlando
Function and class names can overlap. So:
function a() { return "A"; }
class A {}
is valid.
---
Simon Welsh
Admin of http://simon.geek.nz/
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