CiviCRM Community Forums (archive)

Hello,

I want to change the address (sub)page (for Belgian post system!) from this

[ City ]    [ Zip ]

to

[ Zip ] [ Drop down of cities depending on zip ]

In words: First the zip code is filled in, then, depending on that code a (short list of) cities is displayed in a drop down and with a click the corresponding city is selected.

Actually, I can use any type of advice here. I am an experienced (database) programmer but new to CiviCRM as well as PHP (tutorial helped here). I have done some reading and looked in the code but I am somewhat clueless where to start. I *think* I should write a "hook" to do this, but I could not find any appropriate page to find more about that.

Help is welcome in any form like:

• General advice (is a hook the way to go?)
• Links of tutorials or help-files about hooks, or similar adjustments of CiviCRM
• What are all the files that I might need to edit (I came as far as ..\CRM\Contact\form\edit\address.php)
• Ready-to-use code - yes, I would accept that too

Thanks, Bert.

Thanks lobo,

The blog link is a good start. While I learn more questions pop up:
1. I can not seem to find "tmcivicrm.module" somewhere in the CiviCRM files, which makes me think it should be created from scratch?! But where?
2. Is there more documentation on hook_civicrm_buildForm() ? I only found a few lines...
3. Using javascript could be a good idea, however, database access will be needed (to find which cities have the given zipcode). Should I look into Ajax to do this?

The second link you gave me might be good for later (or, put differently, I did not really understood what I was reading there)

Regards, Bert.