Use one form field to complete another

backagain

Hi all,

My problem is this: I have one form field from which counties are selected, and I want this to fill a field below it with the towns in that county.

This represents my dismal attempt at achieving this:

switch ($_POST['counties']) {

case "BD";

$_POST['places'] == "BED";

break;

case "BK";

$_POST['places'] == "BER";

break;

case "BU";

$_POST['places'] == "BUK";

break;

}

I've two large arrays, tried to post them here but where to long. The items in double quotes are the keys from the arrays. I tied using :globals ($counties) and globals ($places), these are the arrays vars names, didn't work either.

What the entry is suppose to mean is:

If $counties (key is equal to Bd (bedford) then $places (form_field)
should == (equal to only the towns in bedford, represents by the array key "BED"

If some kind person could point me in the right direction it would be gratefully appreciated.

Matt_Kindig

I think you mean to use the single = sign (assignment) rather than the == sign (equality). Such that:

switch ($_POST['counties']) {

case "BD";

$_POST['places'] = "BED";

break;

case "BK";

$_POST['places'] = "BER";

break;

case "BU";

$_POST['places'] = "BUK";

break;

}

Matt_Kindig

On second thought...are you intending for the user to select a county on a form, and then have the form automatically fill out the towns, without reloading the form? Because if so, you won't be able to do this with PHP. You need to use Javascript or another client-side language for that.

harmor

You want something like this
http://www.webpasties.com/xmlHttpRequest/
But ofcoarse using cars make and models with drop down menus?

edcellgavin

check this out

http://www.supermarketings.com/images/cscombo.js

backagain

Hi edcellgavin

Have downloaded the class file, but not sure what to do with it? Have tried calling it: include ('name') then called the funtion: function name(), get an error saying function not available, so put it in head and tried again, still no luck. Any ideas how to call it?

edcellgavin

sorry 'but that but i realized that the link i posted is a javascript function. it'll work on the client level (within the browser) and php has nothing to do with it. it does the job, though.
i don't have it in php but you could try calling the fillcountry() when the script is called and and fillstate() when the user chose a different entry in the country combo box(perhaps in the onchange() event). With regard to coding, same logic applies, and you can skip the browser sniffing (browser checking) part.