[development] Form Textfield numeric

William Smith william.darren at gmail.com
Thu Mar 10 16:59:35 UTC 2011

When your form is submitted, it will pass through a validation function if
you define one.  The function name should be nameofyourform_validate($form,

See http://drupal.org/node/751826 (The Drupal forms quickstart guide).

This function will be automatically called when a user submits your form.
Inside this function, you can check on the values of $form and use PHP's
is_numeric to be sure that $form_state['ci'] is a numerical value.  If it is
not (that is, if is_numeric returns FALSE), use form_set_error to invalidate
the submission and return the user to the form page with an error message.

On Thu, Mar 10, 2011 at 11:46 AM, Damian Adriel Perez Valdes <
damian.adriel at gmail.com> wrote:

> Hello:
> I need your help. I'm making a Drupal module, and i need to validate if the
> textfield data are numeric or not. can i use a drupal functions for this ?
> This is my form code:
>             'ci' => array (
>                 '#title' => t('C.I.'),
>                 '#type' => 'textfield',
>                 '#maxlength' => 11,
>                 '#size' => 20,
>                 '#required' => TRUE,
>             ),
> Thanks.
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