Drupal中的hook_form_FORM_ID_alter函数

Question

I would like to overwrite a form by creating a custom module. But therefor, I need to get a hold to my form ID in the function.

Drupal.org mentionned the hook_form_FORM_ID_alter(&$form, &$form_state, $form_id) function, but when I apply this to my form, it doesn't respond. Do I have a syntax error when I use following statement?:

function redactie_omgeving_fiche_node_form__form_alter(&$form, $form_state, $form_id) {
    echo(var_dump('ONZE redactie_omgeving__fiche_node_form__form_alter'));
}

and this is my form:

<form class="node-form node-fiche-form" enctype="multipart/form-data" action="/node/1/edit" method="post" id="fiche-node-form" accept-charset="UTF-8">

Answer 1

A nice little trick to make sure you have the right form id is to first use hook_form_alter() to get the form id, then use hook_form_FORM_ID_alter() . For example, use:

function YOURMODULE_form_alter(&$form, &$form_state, $form_id) {
  drupal_set_message($form_id);
}

to see a Drupal message of all form id's on the current page. Once you have the correct id, then place it into hook_form_FORM_ID_alter() . Try that and make sure you are using the right form id.