May 2012 – AgileAdam.com

Using hook_form_alter or hook_form_FORM_ID_alter one can easily add a “Reset” button to a Drupal form.

In this example we’re actually trying to reset anything the user typed after the form loaded. This will not remove the default values.

Here’s a simple example (Drupal 6)

/**
 * Implementation of hook_form_alter().
 */
function mymodule_form_alter(&$form, &$form_state, $form_id) {
  switch ($form_id) {
    case 'myform':
      $form['buttons']['reset_button'] = array(
        '#type' => 'markup',
        '#value' => '<input class="form-button" type="reset" value="Reset">',
        '#weight' => 2000,
      );
      break;
  }
}

/**

* Implementation of hook_form_alter().

function mymodule_form_alter(&$form, &$form_state, $form_id) {

switch ($form_id) {

case 'myform':

$form['buttons']['reset_button'] = array(

'#type' => 'markup',

'#value' => '<input class="form-button" type="reset" value="Reset">',

'#weight' => 2000,

);

break;

}

It may not be appropriate for you to put your new reset element into the buttons array. Use dpm() (part of the Devel module) to show what $form looks like. If you don’t understand this, and the code above isn’t working for you, you may try $form[‘reset_button’] = array….

Adjust the value of #weight to move the button around the form. dpm($form) will show you weights (if any) of existing elements so you can make educated decisions about the weight of your new field.

One last note about the ‘#type’ => ‘markup’ line: this is not a requirement, but I like to include it for clarity.

UPDATE:
Here’s what the field might look like for Drupal 7:

$form['reset'] = array(
  '#type' => 'markup',
  '#markup' => '<input class="form-submit" type="reset" value="Reset">',
);

$form['reset'] = array(

'#type' => 'markup',

'#markup' => '<input class="form-submit" type="reset" value="Reset">',

);