[PHP] isset opposite

2004-11-16 Thread Dustin Krysak 
Hi there.. I am pretty new to PHP, and I am familiar with php isset 
option now i was wondering (I have looked at the PHP site - but 
can not find it) how can you check if something is not set? I need to 
test if a $_GET is not set (not just empty).

thanks in advance!
d
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Re: [PHP] isset opposite

2004-11-16 Thread Matthew Sims 
 Hi there.. I am pretty new to PHP, and I am familiar with php isset
 option now i was wondering (I have looked at the PHP site - but
 can not find it) how can you check if something is not set? I need to
 test if a $_GET is not set (not just empty).

 thanks in advance!

 d



I'm sure I'll be one of the many who says this:

!isset

The ! means not. You can use it with most of the functions like !empty
(not empty).

So you can use it like so:

if (!isset($_GET[var])) {
  do stuff
}

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Re: [PHP] isset opposite

2004-11-16 Thread Greg Donald 
On Tue, 16 Nov 2004 15:11:39 -0800, Dustin Krysak
[EMAIL PROTECTED] wrote:
 how can you check if something is not set?

!isset()

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Re: [PHP] isset opposite

2004-11-16 Thread Ryan King 
On Nov 16, 2004, at 5:11 PM, Dustin Krysak wrote:
Hi there.. I am pretty new to PHP, and I am familiar with php isset 
option now i was wondering (I have looked at the PHP site - 
but can not find it) how can you check if something is not set? I need 
to test if a $_GET is not set (not just empty).
!array_key_exists('yourkey', $_GET);
-ryan
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Re: [PHP] isset opposite

2004-11-16 Thread Robby Russell 
On Tue, 2004-11-16 at 15:11 -0800, Dustin Krysak wrote:
 Hi there.. I am pretty new to PHP, and I am familiar with php isset 
 option now i was wondering (I have looked at the PHP site - but 
 can not find it) how can you check if something is not set? I need to 
 test if a $_GET is not set (not just empty).
 
 thanks in advance!
 
 d
 

isset() returns a boolean.

so...try,

if (!isset($x))


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Re: [PHP] isset opposite

2004-11-16 Thread Dustin Krysak 
Thanks!
perfect!
d
On 16-Nov-04, at 4:13 PM, Robby Russell wrote:
On Tue, 2004-11-16 at 15:11 -0800, Dustin Krysak wrote:
Hi there.. I am pretty new to PHP, and I am familiar with php isset
option now i was wondering (I have looked at the PHP site - 
but
can not find it) how can you check if something is not set? I need to
test if a $_GET is not set (not just empty).

thanks in advance!
d
isset() returns a boolean.
so...try,
if (!isset($x))
--
/***
* Robby Russell | Owner.Developer.Geek
* PLANET ARGON  | www.planetargon.com
* Portland, OR  | [EMAIL PROTECTED]
* 503.351.4730  | blog.planetargon.com
* PHP/PostgreSQL Hosting  Development
*--- Now supporting PHP5 ---
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Re: [PHP] isset opposite

2004-11-16 Thread Robby Russell 
On Tue, 2004-11-16 at 17:19 -0800, Dustin Krysak wrote:
 Thanks!
 
 perfect!
 
 d

For future reference, just about any function that uses is at the
beginning should return a boolean result. So if (is_array()) can also be
checked with if (!is_array())

This should apply to all the php included functions that start with is. 

-Robby
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Re: [PHP] isset opposite

2004-11-16 Thread Dustin Krysak 
Yeah as soon as I saw this example, I figured that was the case for 
example something like

if (!empty())
and so on.
d
On 16-Nov-04, at 5:26 PM, Robby Russell wrote:
On Tue, 2004-11-16 at 17:19 -0800, Dustin Krysak wrote:
Thanks!
perfect!
d
For future reference, just about any function that uses is at the
beginning should return a boolean result. So if (is_array()) can also 
be
checked with if (!is_array())

This should apply to all the php included functions that start with is.
-Robby
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/***
* Robby Russell | Owner.Developer.Geek
* PLANET ARGON  | www.planetargon.com
* Portland, OR  | [EMAIL PROTECTED]
* 503.351.4730  | blog.planetargon.com
* PHP/PostgreSQL Hosting  Development
*--- Now supporting PHP5 ---
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