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Date: Wed, 19 Nov 2014 15:10:27 +0000
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References: <CAFMT4NpJxuuqc-wTr1aE4K+wZBT8+04j+9-SsY+nhUMU83fDUg@mail.gmail.com> <546C9E22.6090301@fedoraproject.org> <20141119134632.GV2294@phcomp.co.uk> <546CA8C0.1060707@gmail.com> <CAGAGxbbSdvbAQGB+McW3T_aLf585Dvb9XuGTKMmiTNMkZRKAVg@mail.gmail.com> <20141119150713.GY2294@phcomp.co.uk>
To: Alain Williams <addw@phcomp.co.uk>
Subject: Re: [PHP-DEV] [RFC] Remove PHP 4 Constructors
From: ajf@ajf.me (Andrea Faulds)


> On 19 Nov 2014, at 15:07, Alain Williams <addw@phcomp.co.uk> wrote:
>=20
> It is a problem trying to maintain code for different versions of PHP,
> especially where there are syntax differences. It would be really nice =
to have
> some sort of conditional compilation as in C. Eg:
>=20
> It would be nice to be able to do something like:
>=20
> try {
> ....
>=20
> # if PHP_VERSION_ID > 50500
> } catch(PDOException $e) {
>  ....
> } finally {
>   ... tidy up
> }
> # else
> } catch(PDOException $e) {
>  ... tidy up not quite where I want it
>  ....
> }
> # endif
>=20
> OK: '#' might not be a good character since it is start of comment, =
but that is
> the idea.

You could actually run the C preprocessor on your PHP codebase if you =
wanted!

But yes, I can see there might be a need for conditional compilation. To =
a certain extent we already have this, in that you can conditionally =
define functions and classes. Perhaps this could be extended? =
Conditionally defining methods?

    class FooBar {
        if (PHP_VERSION_ID < 50000) {
            public function FooBar() {
                $this->__construct();
            }
        }

        public function __foobar() {
           =20
        }
    }
--
Andrea Faulds
http://ajf.me/