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Stored procedures are used for validation. These are usually external SQL stored procedures wrapped around a CL or RPG program. A UDF can be very useful when directly invoking an SQL select or update statement.

Thanks,
Todd


-----Original Message-----
From: web400-bounces@xxxxxxxxxxxx [mailto:web400-bounces@xxxxxxxxxxxx] On Behalf Of Michael Ryan
Sent: Wednesday, February 06, 2013 9:20 AM
To: Web Enabling the IBM i (AS/400 and iSeries)
Subject: Re: [WEB400] Simple Validation using PHP

Good point Todd. Do you use UDFs for validation, or Stored Procedures?


On Wed, Feb 6, 2013 at 9:10 AM, Allen, Todd <Todd.Allen@xxxxxxxxxxxxxxxxx>wrote:

The drop-down list of available values works fine on a browser-based
application. If you are calling the same back-end process from a web
service then the input values cannot be limited like that. This may
not be a concern for you but something to consider. I always try to
think of all the ways a "back-end" process can be called. You
generally don't want to rely on "front-end" validation.

Thanks,
Todd

-----Original Message-----
From: web400-bounces@xxxxxxxxxxxx [mailto:web400-bounces@xxxxxxxxxxxx]
On Behalf Of Michael Ryan
Sent: Wednesday, February 06, 2013 8:57 AM
To: Web Enabling the IBM i (AS/400 and iSeries)
Subject: Re: [WEB400] Simple Validation using PHP

Good idea Paul, and one I'll implement. Still unclear on how to do
validation against information that's dynamic.

I want to be able to use an SQL UDF from PHP, Seems like I need to use
the same method as using an SQL Stored Procedure. If that's the case,
the value of a function seems to be less than expected.


On Tue, Feb 5, 2013 at 5:03 PM, Paul Holm <pholm@xxxxxxxxxxxxxxxxx> wrote:

Michael,

If you are validating against data on the i, couldn't you have a
drop down list of possible values? So if you are validating invoice
type or store, then you just allow drop down lists with the valid
entries that way the user can only select valid values?

If you list is large, you could use a type ahead approach as well.

THanks, Paul

On 2/5/2013 10:17 AM, Michael Ryan wrote:
What's a good way to do simple validation against data contained
on the i from a PHP program? I'd rather not invest in having to
prepare, param,
and
execute a stored procedure when all I need is a simple true or
false. I have functions (implemented as procedures in a service
program) that returns what I want, but I'm having trouble
executing that function from PHP. I don't have a problem with a
stored procedure that returns values
or
a stored procedure that returns a result set.

Is there something special/different about functions?

Thanks!


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