Solved

check if variable is set

Posted on 2004-09-21
4
204 Views
Last Modified: 2008-01-09
I'm working on something which I am sure is very simple to do in asp but as I'm a php person I'm a bit stuck.

I've got most of what I need but I have to get the script working so that a form's action is the existing page when the submit button is pressed.

In php I would use if (isset ($var)){ } but what is the equivalent in php?
0
Comment
Question by:richardwhit
  • 2
4 Comments
 
LVL 3

Accepted Solution

by:
WhisperUK earned 125 total points
ID: 12110681
Forgive me if I'm misunderstanding you here but I assume that you mean the current page is "default.asp" & you're form is posting to "default.asp". If that's the case then try this.....

<%
  ' Check if variable has been set
  If isNull(request.form("var")) OR request.form("var") = ""  THEN
     ' Variable has not been set or is an empty string
  End If
%>

Hope that helps

0
 

Author Comment

by:richardwhit
ID: 12110706
Yep that looks like it might be what I'm looking for. Sorry my question wasn't very well worded, thats what staring at a computer screen for too long does to you!
0
 
LVL 3

Expert Comment

by:WhisperUK
ID: 12110718
lol - yep i know exactly what you mean
0
 
LVL 7

Expert Comment

by:kmorris1186
ID: 12112396
Here is somthing i like to do when i am posting to teh same site since all the vars will be null before you post...

submit = request.form("Submit")
Var1 = Request.form("Var1")

If Submit = "submit" then
     'then do all other code
end if
0

Featured Post

Is Your Active Directory as Secure as You Think?

More than 75% of all records are compromised because of the loss or theft of a privileged credential. Experts have been exploring Active Directory infrastructure to identify key threats and establish best practices for keeping data safe. Attend this month’s webinar to learn more.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

I recently decide that I needed a way to make my pages scream on the net.   While searching around how I can accomplish this I stumbled across a great article that stated "minimize the server requests." I got to thinking, hey, I use more than one…
I would like to start this tip/trick by saying Thank You, to all who said that this could not be done, as it forced me to make sure that it could be accomplished. :) To start, I want to make sure everyone understands the importance of utilizing p…
This Micro Tutorial will teach you how to censor certain areas of your screen. The example in this video will show a little boy's face being blurred. This will be demonstrated using Adobe Premiere Pro CS6.
This tutorial gives a high-level tour of the interface of Marketo (a marketing automation tool to help businesses track and engage prospective customers and drive them to purchase). You will see the main areas including Marketing Activities, Design …

867 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

12 Experts available now in Live!

Get 1:1 Help Now