Does hook_form_alter Drupal 7 work on node form? This is a common question among Drupal 7 developers who are looking to customize their site’s node forms. In this article, we will delve into the functionality of the hook_form_alter function and its application on node forms in Drupal 7.
The hook_form_alter is a powerful function in Drupal 7 that allows developers to modify existing forms before they are rendered. This function is particularly useful when you want to add additional fields, change the default values, or even remove certain fields from the form. In the context of node forms, this hook can be used to customize the way content is created and edited on your Drupal site.
To answer the question, yes, hook_form_alter Drupal 7 does work on node forms. When you implement this hook in your module, it will be called before the node form is rendered. This gives you the opportunity to modify the form’s structure, behavior, and even the data that is being submitted.
Here’s a basic example of how you can use hook_form_alter to modify a node form in Drupal 7:
“`php
function mymodule_form_alter(&$form, &$form_state, $form_id) {
if ($form_id == ‘node_form’) {
// Add a new field to the node form
$form[‘new_field’] = array(
‘type’ => ‘textfield’,
‘title’ => t(‘New Field’),
‘default_value’ => ‘Default Value’,
);
// Remove the ‘Body’ field from the node form
unset($form[‘body’][‘value’]);
}
}
“`
In this example, we are modifying the node form by adding a new text field called ‘New Field’ and removing the ‘Body’ field from the form. The `$form_id` parameter is used to identify the specific form we want to modify, in this case, the node form.
It’s important to note that when using hook_form_alter on node forms, you should be cautious about modifying the form’s structure and data, as it can lead to unexpected behavior or errors. Always ensure that your modifications are compatible with the rest of your Drupal site and that you have thoroughly tested your changes.
In conclusion, yes, hook_form_alter Drupal 7 does work on node forms. By utilizing this hook, you can customize your site’s node forms to meet your specific requirements. However, it’s crucial to approach this with care and thoroughly test your modifications to ensure a smooth and error-free experience for your users.
