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Constant Scope PHP5

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Arjen Brouwer

23 years ago

Should'nt this work? Currently it reports an error about a undefined constant.

<?
class Test {
const FOO = 100;
var $bar = FOO;
}

$Test = new Test;
echo $Test->bar;
?>

Ciao,
Arjen

Cristiano Duarte

23 years ago

"Arjen Brouwer" <arjenjb@quicknet.nl> escreveu na mensagem
news:001b01c368a1$775b2070$6402a8c0@sleepert...

> Should'nt this work? Currently it reports an error about a undefined

constant.

>
> <?
> class Test {
>     const FOO = 100;
>     var $bar = FOO;
> }
>
> $Test = new Test;
> echo $Test->bar;
> ?>
>
> Ciao,
> Arjen
>

IMHO it should.

Cristiano Duarte.

Zeev Suraski

23 years ago

At 14:35 22/08/2003, Arjen Brouwer wrote:

>Should'nt this work? Currently it reports an error about a undefined constant.
>
><?
>class Test {
>     const FOO = 100;
>     var $bar = FOO;

Should be var $bar = Test::FOO (or self::FOO, even though it appears not to
work right now) - there's no implicit class/object dereference of any kind
in PHP.

Zeev

DvDmanDT

23 years ago

Wait a sec... When did const become a keyword? And since when can you
initialize variables from outside a constructor/function?

Sorry to bother..

--
// DvDmanDT
MSN: dvdmandt@hotmail.com
Mail: dvdmandt@telia.com
"Zeev Suraski" <zeev@zend.com> skrev i meddelandet
news:5.1.0.14.2.20030823012845.0576f768@localhost...
> At 14:35 22/08/2003, Arjen Brouwer wrote:
> >Should'nt this work? Currently it reports an error about a undefined
constant.
> >
> ><?
> >class Test {
> >     const FOO = 100;
> >     var $bar = FOO;
>
> Should be var $bar = Test::FOO (or self::FOO, even though it appears not
to

Zeev Suraski

23 years ago

At 07:03 23/08/2003, DvDmanDT wrote:

>Wait a sec... When did const become a keyword?

In PHP 5.0.

>And since when can you
>initialize variables from outside a constructor/function?

Since PHP 3.0 :)

Zeev

l0t3k

23 years ago

Zeev,
speaking of const, i have a feature request. why not accept "const" in
the global context and create a compile-time global constant ?
e.g.

const FOO = 1 ;
const BAR = 2;

class Barbara {
const Barbara::BUSH = FOO;
};

i'd much prefer this as an alternative to the runtime define().

l0t3k


"Zeev Suraski" <zeev@zend.com> wrote in message
news:5.1.0.14.2.20030823170950.05b14e30@localhost...

Zeev Suraski

23 years ago

At 20:40 23/08/2003, l0t3k wrote:

>Zeev,
>    speaking of const, i have a feature request. why not accept "const" in
>the global context and create a compile-time global constant ?
>e.g.
>
>     const FOO = 1 ;
>     const BAR = 2;
>
>     class Barbara {
>         const Barbara::BUSH = FOO;
>     };
>
>i'd much prefer this as an alternative to the runtime define().

It's going to be runtime either way, because you could do if (...) { const
FOO = 1; } else  {const FOO = 2 }.  Not sure if we want it as syntactic
sugar for define() or not.

Zeev

Curt Zirzow

23 years ago

* Thus wrote Zeev Suraski (zeev@zend.com):

> At 20:40 23/08/2003, l0t3k wrote:
> >Zeev,
> >   speaking of const, i have a feature request. why not accept "const" in
> >the global context and create a compile-time global constant ?
> >e.g.
> >
> >    const FOO = 1 ;
> >    const BAR = 2;
> >
> >    class Barbara {
> >        const Barbara::BUSH = FOO;
> >    };
> >
> >i'd much prefer this as an alternative to the runtime define().
>
> It's going to be runtime either way, because you could do if (...) { const
> FOO = 1; } else  {const FOO = 2 }.  Not sure if we want it as syntactic
> sugar for define() or not.

This would be nice! Id like to add perhaps, but not sure how hard
it would be, to make this constant (aliased define) unchangeable
through out the life time of the script.

Curt

--
"I used to think I was indecisive, but now I'm not so sure."

Brad Bulger

23 years ago

hmm. but you can reference class constants without class/self::
when creating futher constants ('const bla = foo << 1;')
and this works, too:

<?php
class foo
{
const bar = 3;
function bla($x)
{
if ($x === bar)
print "yes it's bar\n";
else
print "no it's not\n";
}
}
$x = new foo;
$x->bla(4);
$x->bla(3);
?>

>> Output:
>> no it's not
>> yes it's bar

Zeev Suraski wrote:

Zeev Suraski

23 years ago

Yes, there appears to be some inconsistency here.  We'll look into it.

Zeev

At 21:14 23/08/2003, Brad Bulger wrote: