FW: [PHP-DB] error checking question

------ Forwarded Message > From: David Shugarts <Azimuth@CompuServe.com> > Date: Thu, 26 Jun 2003 18:53:53 -0400 > To: <dpgirago@mdanderson.org> > Subject: Re: [PHP-DB] error checking question > > Hi, David-- > > The question you are asking belongs to the topic or concept called "form > validation" and you will see lots of hits about it on a Google search. I have > been looking at the same issue and I am impressed with one solution, > http://www.x-code.com/vdaemon_web_form_validation.php. However, > I am > interested in what other people might think. > > With the help of this List, I have had some success in validation of one or > two variables in a form, but this solution, vdaemon, represents an attempt to > cover the complete spectrum of the variables people most often want to > validate. I feel it may be on the right track (even though the one I wish to > validate isn't covered). > > --Dave Shugarts > >> >> >> >> Hello everyone, >> >> I've been experimenting with checking for errors in data inserted into a >> table >> using an html form. The main page displays the result of a "select * from >> the_table" at the top of the page, with the form for inserting the data >> beneath. >> The SQL for the insert occurs on a different page, with redirection back to >> the >> main page using the header() function ( as I've learned to do from reading >> this >> list ). This all works well. The inserted data shows up in the table, and >> there >> are no surprises when refreshing, etc... I have also implemented some error >> checking on the client side using JavaScript, and this is also working well. >> >> What I would like to do is somehow have a redundant error check on the server >> side and then display an error message above the form on the main page should >> fields be left blank or forbidden characters entered. Since I have access to >> the >> $_POST['variables'] on the form processing page, I've already written some >> code >> to detect the presence of error characters, etc...and no query is performed >> if >> there is an error. But how do I pass a "flag" variable back to the main page >> to >> echo an appropriate message above the form? >> >> Advice or suggestions greatly appreciated. >> >> David >> >> ------ End of Forwarded Message