nodeapi_example_form_alter
- Versions
- 4.7 – 5
nodeapi_example_form_alter($form_id, &$form)- 6 – 7
nodeapi_example_form_alter(&$form, $form_state, $form_id)
Implementation of hook_form_alter().
By implementing this hook, we're able to modify any form. We'll only make changes to two types: a node's content type configuration and edit forms.
Code
developer/examples/nodeapi_example.module, line 18
<?php
function nodeapi_example_form_alter($form_id, &$form) {
// We're only modifying node forms, if the type field isn't set we don't need
// to bother; otherwise, store it for later retrieval.
if (isset($form['type'])) {
$type = $form['type']['#value'];
}
elseif (isset($form['orig_type'])) {
$type = $form['orig_type']['#value'];
}
else {
return;
}
// The rating is enabled on a per node type basis. The variable used to store
// this information is named named using both the name of this module, to
// avoid namespace conflicts, and the node type, because we support multiple node
// types.
$enabled = variable_get('nodeapi_example_'. $type, 0);
switch ($form_id) {
// We need to have a way for administrators to indicate which content
// types should have our rating field added. This is done by inserting a
// checkbox in the node's content type configuration page. The variable will
// be automatically saved by the settings form.
case 'node_type_form':
$form['workflow']['nodeapi_example_'. $type] = array(
'#type' => 'radios',
'#title' => t('NodeAPI Example Rating'),
'#default_value' => $enabled,
'#options' => array(0 => t('Disabled'), 1 => t('Enabled')),
'#description' => t('Should this node have a rating attached to it?'),
);
break;
case $type .'_node_form':
// If the rating is enabled for this node type, we insert our control
// into the form.
if ($enabled) {
$options = array(0 => t('Unrated'), 1, 2, 3, 4, 5);
$form['nodeapi_example_rating'] = array(
'#type' => 'select',
'#title' => t('Rating'),
'#default_value' => $form['#node']->nodeapi_example_rating,
'#options' => $options,
'#required' => TRUE,
'#weight' => 0,
);
}
break;
}
}
?>