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Date: Thu, 21 Apr 2011 00:50:46 +0200
Message-ID: <BANLkTi=qt12J0aj1Y7ktDpFSSo+JAJvq3g@mail.gmail.com>
To: "dante@lorenso.com" <dante@lorenso.com>
Cc: "internals@lists.php.net" <internals@lists.php.net>
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Subject: Re: Function proposal: varset
From: markg85@gmail.com (Mark)

On Wednesday, April 20, 2011, D. Dante Lorenso <dante@lorenso.com> wrote:
> On 4/20/11 9:55 AM, Mark wrote:
>
> Hi,
> This proposal is for the often called line like this:
> $var =3D isset($_GET['var']) ? $_GET['var'] : '';
> Only a shorter and imho a cleaner solution to get the same:
> $var =3D varset($_GET['var']);
>
> The implementation for this in PHP code is this:
>
> # Arg 1 =3D the variable to check for existence
> # Arg 2 =3D the default return value which is an empty string by default
>
> function varset($var, $default =3D '')
> {
> return (isset($var) ? $var : $default);
> }
>
>
> I proposed something similar over 5 years ago. =A0It ain't gonna happen b=
ecause PHP language can't support it. =A0The Zend engine needs to be rewrit=
ten to remove the warnings and that's not something they are volunteering t=
o do no matter how much people want it.
>
>  =A0http://markmail.org/message/yl26ebzcix35wtke
>
> My proposal was called "filled" since it was the opposite of "empty" whic=
h already existed. =A0I extended the function to return the first non-empty=
 value or null if all values evaluated as empty.
>
> You could use the function like this:
>
>  =A0$x =3D filled($_GET['x'], $obj->something, $default, 'default');
>
> It would return the first argument where !empty($arg) evaluates as TRUE.
>
> There would need to be a companion function to check 'isset' opposite as =
you have proposed.
>
> Like I said, though, I don't think this can be done in the language becau=
se I think they ran out of OPCODES and would have to tear apart the whole P=
HP engine to support such a feature.
>
> -- Dante
>
> --
> PHP Internals - PHP Runtime Development Mailing List
> To unsubscribe, visit: http://www.php.net/unsub.php
>
>
Hi,

well, i did propose 2 possible ways although the second one is a
little longer but still clean and readable.
And the second one is certainly possible to implement!

Btw. i did look at the suggested core php code parts and even though i
can do nearly everything in php.. i have a hard time understanding how
the inner php parsing things actually work. There is no way i'm able
to make a patch for php.

Regards,
Mark