Hi Maxime,
> On 1 Jan 2015, at 13:29, Maxime Veber <[email protected]> wrote:
>
> I was expected an RFC like this in PHP for a while. I'm happy somebody made
> one, thanks.
Glad to hear that.
> But something hit me in that. even if you can't give an objet, you can give
> any scalar type that will be cast.
> I'm not sure this behavior is very relevant.
>
> Actually if I ask for a string, why the user could be specify an int without
> getting error ?
>
> Consider the following PHP 5.6 code:
>
> function foo($a) {
> if (!is_string($a)) {
> throw new \Exception('You need to give a string');
> }
> }
>
> Using your type hinting does not fix the problem of string checking because
> the value will just be cast if it's an integer. Ofc if the user give an
> object it's ok.
> But why not throw a message error in any cases ?
For various reasons, PHP has always been a weakly-typed language, so we allow
conversions between scalar types when they make sense. An integer isn’t a
string, sure, but it can be simply converted to one and the result makes sense,
so I think that’s why we allow it. It would still error in some cases, like an
object without __toString for a string parameter, or an array for an integer
parameter.
Thanks.
--
Andrea Faulds
http://ajf.me/
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