Changing the height of a textarea

Forms in Drupal are managed using the Form API and modified using hook_form_alter(). In this recipe, we will look at changing the default height, or to be more precise, the default number of rows of the textarea which represents the body field in a node form.

Getting ready

We will be using the mysite module created earlier in this book to contain the hook_form_alter().

How to do it...

Navigate to the mysite module folder at sites/all/modules/mysite to perform the following steps:

1. Locate the file mysite.module and open it in an editor.

2. Scroll down to the bottom and add the following function:

   /**
   * Implementation of hook_form_alter().
   */
   function mysite_form_alter(&$form, &$form_state, $form_id) {
   // dpm($form_id);
   // dpm($form);
   if (isset($form['#node']) && $form['#node']->type . '_node_form' == $form_id) {
   $form['body_field']['body']['#rows'] = 5;
   }
   }
   

   If there is a pre-existing implementation of hook_form_alter(), the highlighted code above...