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How to do Numeric Validation in Drupal Webforms

Submitted by vaibhav on Sat, 10/10/2009 - 11:13
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I spent a lot of time to figure out How to restrict only numeric data in drupal webforms. To my surprise drupal does'nt provide such functionality. But we can achieve it through Additional Validation in Webform Advanced Settings.

Just write this PHP code in additional validation.

  $mobile_no = $form_values['submitted_tree']['mobile_no'];
  if (strlen(trim($mobile_no)) > 0){
    if (!is_numeric($mobile_no)) {
      form_set_error('submitted][mobile_no', t('Mobile No. must be Numeric'));
    }
  }

Replace mobile_no with your "Field Key" of the component you want to validate

Thanks

Submitted by Nikhil (not verified) on Sat, 10/24/2009 - 12:27.

Thanks for this great information. You save me a lot of time.

@Nikhil

Submitted by vaibhav on Thu, 11/05/2009 - 02:35.

My pleasure.

Thanks. Can you provide more

Submitted by Greg T (not verified) on Tue, 11/17/2009 - 19:19.

Thanks. Can you provide more information. If you can attach some snapshots, it would be great

The field module has a

Submitted by Jelle (not verified) on Fri, 02/04/2011 - 16:35.

The field module has a function for this: _element_validate_number, so you can do:

$form['my_numeric_field'] = array(
    '#type' => 'textfield',
    '#title' => t('Number'),
    '#description' => t('This is a numeric field'),
    '#default_value' => 0,
    '#element_validate' => '_element_validate_number',
);

Sorry, I made a mistake, the

Submitted by Jelle (not verified) on Fri, 02/04/2011 - 16:39.

Sorry, I made a mistake,
the validate functions should be in an array, so the code looks like:

$form['my_numeric_field'] = array(
    '#type' => 'textfield',
    '#title' => t('Number'),
    '#description' => t('This is a numeric field'),
    '#default_value' => 0,
    '#element_validate' => array('_element_validate_number'),
);

How do I implement this?

Submitted by swehes (not verified) on Sat, 03/12/2011 - 03:49.

This is awesome Jelle,

I am a noob and wonder how I can implement this into a form. Where does the code go?

Thanks a lot

Submitted by donSchoe (not verified) on Wed, 03/02/2011 - 22:12.

Thanks a lot for this code snippet! :)

than ks a lot

Submitted by Tanmoy (not verified) on Fri, 12/16/2011 - 17:31.

It solve my problem thanks a lot sir

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