>> Le 12 août 2020 à 20:19, Luis - SoftSAT Sistemas
>> <[email protected]> a écrit :
>>
>> In the effort to make PHP a better language i want to ask why not "fix"
>> nested functions as suggested in
>> (https://wiki.php.net/rfc/true-nested-function-support) or block their usage?
>> The current behavior is a lot unexpected.
>>
>> I am new here, sorry if it was already discussed, i can't find a good way
>> to search the mailing history.
>
> Hi,
>
> Defining a global function inside another function is not useless. Here is a
> dummy example:
>
> ```php
> // a.php
> spl_autoload_register(function ($classname) {
> if ($classname === 'Foo\\B')
> require 'foo/b.php';
> })
>
> // foo/b.php
> namespace Foo;
>
> class B {
> // ...
> }
>
> function some_helper(....$args) {
> // ...
> }
> ```
>
> The global function `Foo\some_helper` is defined inside the function used as
> autoloader.
>
> Also, from the RFC:
>
>> They exist in the global namespace.
>
> I think you meant “They exist in the global scope”? because they are defined
> in the namespace corresponding to the eventual `namespace` declaration of the
> file.
>
> —Claude
You are right Claude, i wasn't thinking about this use case.
But outside of this use case more problems arise.
If `foo/b.php` have some global variable and some function that use it the
function breaks because the global variable will be "included" into current
scope, while the functions into namespace scope.
```php
//a.php
function foo() {
require 'b.php';
//var_dump($something);
}
foo();
var_dump(bar());
//b.php
$something = 10;
function bar() {
global $something;
return $something;
}
```
I expected the `var_dump(bar());` output to be `int (10)`, but it was `NULL`,
while if i do `var_dump($something);` from `foo()` it outputs `int(10)` as
"normally expected".
Given that "bar()" are at namespace scope, this can be "fixed" changing
`$something = 10;` to `$GLOBALS['something'] = 10;`, but that doesn't change
the fact that this behavior are odd and not intuitive.
PS: I known that global variables are a bad thing, it was just an example.
Anyway now i see that changing this will break the auto loader system.
About the RFC you are right, they are wrong about the scope, but the RFC aren't
mine, i just found it while searching about the subject.
--L. Henrique
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