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Date: Mon, 23 Dec 2013 09:55:03 +0800
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To: Kevin Ingwersen <ingwie2000@googlemail.com>
Cc: php-dev <internals@lists.php.net>
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Subject: Re: [PHP-DEV] Why is require still a function?
From: tjerk.meesters@gmail.com (Tjerk Meesters)

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Hi,


On Mon, Dec 23, 2013 at 8:28 AM, Kevin Ingwersen
<ingwie2000@googlemail.com>wrote:

> Hello there.
>
> I have seen an implementation of nodejs=92 require function - but it need=
ed
> to use a variable-function ($require(string $name)) instead, because
> =82require()=91 is given.
>
> My questions are:
> - Why is require still also available as a function?
> - Why can=92t re re-define something like that?
>

This is because `require` is not a function but a language construct; the
token is defined in the language parser definition:

http://lxr.php.net/xref/PHP_5_6/Zend/zend_language_parser.y#62

Because of this, `require` is a reserved word unless exceptions are made in
the parser itself, so `class require` and `function require()`, even when
defined inside your own namespace will cause a parse error.


>
> Kind regards, and thanks! ^^
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>
>


--=20
--
Tjerk

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