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]

I noticed that Message-ID: <Of*****************@fe1.texas.rr.com> from
Tesla contained the following:

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

syntax please? :)

yes. :)
if($http_post_vars['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]

Geoff Berrow a écrit le 20/02/2004 :

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

syntax please? :)

yes. :)
if($http_post_vars['name']){do this}

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

[Garrett Albright]

In article <me********************************@free.fr.Remove this>,
Jedi121 <je*********@free.fr.Removethis> wrote:

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

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

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]

Garrett Albright <g_******************@ya-nospam-hoo.com> schrieb:

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.

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

Regards,
Matthias

[Garrett Albright]

In article <c1**********@usenet.esken.de>,
Matthias Esken <mu******************@usenetverwaltung.org> wrote:

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

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