CHecking variable Existence

[Tesla]

Hey guys, I want to PHP to do stuff only if a sertain form variable exists.
How do i check to see if a variable exists or not?

Something like If $http_post_vars['name'] exists, then do this.

syntax please? :)

[Geoff Berrow]

Re: CHecking variable Existence

I noticed that Message-ID: <OfvZb.5860$J84 .5476@fe1.texas .rr.com> from
Tesla contained the following:
[color=blue]
>Something like If $http_post_vars['name'] exists, then do this.
>
>syntax please? :)[/color]

yes. :)


if($http_post_v ars['name']){do this}



--
Geoff Berrow (put thecat out to email)
It's only Usenet, no one dies.
My opinions, not the committee's, mine.
Simple RFDs http://www.ckdog.co.uk/rfdmaker/

[Jedi121]

Re: CHecking variable Existence

Geoff Berrow a écrit le 20/02/2004 :[color=blue][color=green]
>> Something like If $http_post_vars['name'] exists, then do this.
>>
>> syntax please? :)[/color]
>
> yes. :)
>
>
> if($http_post_v ars['name']){do this}[/color]

I prefer using isset() function : http://www.php.net/isset

[Garrett Albright]

Re: CHecking variable Existence

In article <mesnews.a83c7d 42.89c625b7.549 .2689@free.fr.R emovethis>,
Jedi121 <jedi121news@fr ee.fr.Removethi s> wrote:
[color=blue][color=green]
> > if($http_post_v ars['name']){do this}[/color]
>
> I prefer using isset() function : http://www.php.net/isset[/color]

I have a similar issue as the first poster.

isset($_POST['name']) works, as does if ($_POST['name']!=NULL) . The
problem is that, if error_reporting is set to E_ALL, both of those will
pop up an error that says "Notice: Undefined index: name" at the top of
the page. Yes, you can make that go away by setting error_reporting to
ignore Notices, but when I'm testing scripts I like to keep it on E_ALL
so I know if I'm doing something that's not fatal but still stupid.

So is there a way to check for a variable's existence without PHP
whining if it doesn't exist? :P

if ($POST['name']) seems to always evaluate as true in my tests -- as
well as pop up a Notice.

[Matthias Esken]

Re: CHecking variable Existence

Garrett Albright <g_m_albr-nospam-ight@ya-nospam-hoo.com> schrieb:
[color=blue]
> isset($_POST['name']) works, as does if ($_POST['name']!=NULL) . The
> problem is that, if error_reporting is set to E_ALL, both of those will
> pop up an error that says "Notice: Undefined index: name" at the top of
> the page.[/color]

isset($_POST['name']) shouldn't give a notice. Please recheck that.

Regards,
Matthias

[Garrett Albright]

Re: CHecking variable Existence

In article <c1ae4f.1nc.1@u senet.esken.de> ,
Matthias Esken <muelleimer2004 nospam@usenetve rwaltung.org> wrote:
[color=blue]
> isset($_POST['name']) shouldn't give a notice. Please recheck that.[/color]

Recheck I did, and it did not give a notice. I must have had an error
elsewhere in the code. My bad. :/