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CHecking variable Existence

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? :)
Jul 17 '05 #1
5 7914
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_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/
Jul 17 '05 #2
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_v ars['name']){do this}

I prefer using isset() function : http://www.php.net/isset
Jul 17 '05 #3
In article <me************ *************** *****@free.fr.R emovethis>,
Jedi121 <je*********@fr ee.fr.Removethi s> wrote:
if($http_post_v ars['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 ($POST['name']) seems to always evaluate as true in my tests -- as
well as pop up a Notice.
Jul 17 '05 #4
Garrett Albright <g_************ ******@ya-nospam-hoo.com> schrieb:
isset($_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.

Jul 17 '05 #5
In article <c1**********@u senet.esken.de> ,
Matthias Esken <mu************ ******@usenetve rwaltung.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. :/
Jul 17 '05 #6

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