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Date: Sat, 28 Jan 2017 21:17:28 +0100
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To: Rasmus Schultz <rasmus@mindplay.dk>
Cc: Rowan Collins <rowan.collins@gmail.com>, PHP Internals <internals@lists.php.net>
Content-Type: multipart/alternative; boundary=94eb2c0b7b0084e66005472d4560
Subject: Re: [PHP-DEV] Not autoloading functions
From: netmo.php@gmail.com (Wes)

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> > old applications could maintain compatibility only
> > by adding a simple autoloader that would alias the global
> function/constant
> > into the calling namespace
>
>
So as a side-effect of calling any function, my namespace would get
> polluted with all sorts of random names? That sounds like a messy
> work-around.
>
>
Obviously it would be just a temporary workaround.


> Okay, so take it back for a moment.
>
> The problem case is this, right?
>
>     namespace Foo;
>     bar();
>
> If the function Foo\bar() has not already been loaded, we fall back to
> bar() in the global namespace.
>
> With a function-autoloader in place, we would need to trigger this for
> every function-call from any namespace, and that's unacceptable.
>

I'm sorry, it's unacceptable for who? Only for not defined function it
would be called. If I call the same function a thousand times, the autoload
will be attempted just the first time, and if it doesn't work then the
script would die, exactly like classes. Any project I know that uses
functions define them one per file, and each file is required one by one.
How is that different? Plus, there's opcache: function autoloading is not
really autoloading but actually about "not having to maintain lists of
require()s". Also, if you really think having one function per file is too
much, you can always require everything in one go:

```
function autoloadFunction($functionFQN){
    // $functionFQN = "\\foo\\bar\\functionName";
    $namespace = substr($functionFQN, 0, strrpos($functionFQN, '\\'));
    require($namespace . '\\all_the_functions_and_constants.php');
}
```


> So what if, instead of trying to autoload everything by default, we make
> it opt-in? Something like:
>

People clearly need this and I wouldn't mind if this was the solution. But,
this is a workaround imho, and contrarily to what I've suggested, this
wouldn't be temporary.

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