[development] Form Textfield numeric

[Ted]

On 3/10/2011 11:46 AM, Damian Adriel Perez Valdes wrote:
> ...i need to validate if the textfield data are numeric or not. can i 
> use a drupal functions for this ?
>

Looks like you got your answer before I could hit send. Here's some more 
links and info:

For Drupal 6, read the Form API Quickstart Guide 
(http://drupal.org/node/751826, search for "Validating Forms"), which is 
linked from the main Form API doc page (http://drupal.org/node/204270). 
You can also read about the #validate and #element_validate attributes 
at [1] and [2].

For Drupal 7, things are mostly the same, at least as far as validation 
goes. See http://randyfay.com/taxonomy/term/21 for some other changes if 
you're interested.

[1] 
http://api.drupal.org/api/drupal/developer--topics--forms_api_reference.html/6#validate
[2] 
http://api.drupal.org/api/drupal/developer--topics--forms_api_reference.html/6#element_validate