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Re: loose thinking [message #176798 is a reply to message #176797]

Wed, 25 January 2012 19:37

Thomas 'PointedEars'
Messages: 701
Registered: October 2010

Karma:

Senior Member

Peter H. Coffin wrote:

> On Wed, 25 Jan 2012 04:49:19 +0100, Thomas 'PointedEars' Lahn wrote:
>> Peter H. Coffin wrote:
>>> On Tue, 24 Jan 2012 14:32:52 +0100, M. Strobel wrote:
>>>> Okay I see it is well documented. I just started testing.
>>>>
>>>> I am angry about it because not even isset() respects the null value
>>>> here. I think it makes more sense this way: isset($a[null]) should
>>>> return false, because there is no null index.
>>> Parens change precedence. Even on functions.
>>
>> You are missing the point, which is: `null' is being converted to the
>> primitive string value ''. A key of an *associative* array may be the
>> empty string. And that is good so.
>
> That's the *same point*, not "missing the point". I'm sorry that I'm not
> wandering down the same mental path would, but I don't think in exactly
> the same terms you do. Not everybody does.

I do not follow. Please explain why you think (operator) precedence has
something to do with this problem.

>> What is questionable here is the implicit type conversion of non-numeric
>> values to string. But PHP is not alone there, so this behavior can be
>> expected. It might be nice if E_STRICT reported such spurious
>> conversions
>> or there was an even stricter mode that forbade them. Perhaps in PHP 6
>> ???

There were no question marks in my posting, there was an ellipsis. Please
get a working newsreader; Unicode and UTF-8 are anything but new or exotic
nowadays.

> null's a special case that's NOT reported. Other cases of this are
> reported.
>
> hellsop /home/hellsop
> [07:57:10] $ cat foo.php
> <?php
>
> $arr = array( q => 'r');
>
> print_r($arr);
>
> ?>
> hellsop /home/hellsop
> [07:57:12] $ php -f foo.php
> PHP Notice: Use of undefined constant q - assumed 'q' in
> /home/hellsop/foo.php on line 3

Please notice that this is only a notice.

> Array
> (
> [q] => r
> )
> hellsop /home/hellsop
> [07:57:15] $

Because `null' is a reserved word, thus cannot be the identifier of a
constant. Where `null' is the value of another expression (like a variable
reference), PHP shows its being influenced by C, Perl and Tcl, and its
applicability as a shell scripting language, where (with the exception of C)
loose typing is common and you do not have to declare variables before you
refer to them.

PointedEars
--
realism: HTML 4.01 Strict
evangelism: XHTML 1.0 Strict
madness: XHTML 1.1 as application/xhtml+xml
-- Bjoern Hoehrmann

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[Message index]

		loose thinking By: M. Strobel on Tue, 24 January 2012 10:57
		Re: loose thinking By: alvaro.NOSPAMTHANX on Tue, 24 January 2012 13:04
		Re: loose thinking By: M. Strobel on Tue, 24 January 2012 13:32
		Re: loose thinking By: The Natural Philosoph on Tue, 24 January 2012 13:41
		Re: loose thinking By: Jerry Stuckle on Tue, 24 January 2012 14:35
		Re: loose thinking By: Peter H. Coffin on Tue, 24 January 2012 14:16
		Re: loose thinking By: M. Strobel on Tue, 24 January 2012 16:35
		Re: loose thinking By: The Natural Philosoph on Tue, 24 January 2012 16:59
		Re: loose thinking By: M. Strobel on Tue, 24 January 2012 18:11
		Re: loose thinking By: Thomas 'PointedEars' on Wed, 25 January 2012 03:49
		Re: loose thinking By: Peter H. Coffin on Wed, 25 January 2012 13:58
		Re: loose thinking By: Thomas 'PointedEars' on Wed, 25 January 2012 19:37
		Re: loose thinking By: alvaro.NOSPAMTHANX on Tue, 24 January 2012 15:20
		Re: loose thinking By: The Natural Philosoph on Tue, 24 January 2012 15:43
		Re: loose thinking By: M. Strobel on Tue, 24 January 2012 18:43
		Re: loose thinking By: Arno Welzel on Tue, 24 January 2012 16:02
		Re: loose thinking By: M. Strobel on Tue, 24 January 2012 16:28

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