Executes custom validation and submission handlers for a given form.
Button-specific handlers are checked first. If none exist, the function falls back to form-level handlers.
$type: The type of handler to execute. 'validate' or 'submit' are the defaults used by Form API.
$form: An associative array containing the structure of the form.
$form_state: A keyed array containing the current state of the form. If the user submitted the form by clicking a button with custom handler functions defined, those handlers will be stored here.
function form_execute_handlers($type, &$form, &$form_state) {
$return = FALSE;
// If there was a button pressed, use its handlers.
if (isset($form_state[$type . '_handlers'])) {
$handlers = $form_state[$type . '_handlers'];
}
elseif (isset($form['#' . $type])) {
$handlers = $form['#' . $type];
}
else {
$handlers = array();
}
foreach ($handlers as $function) {
// Check if a previous _submit handler has set a batch, but make sure we
// do not react to a batch that is already being processed (for instance
// if a batch operation performs a drupal_form_submit()).
if ($type == 'submit' && ($batch =& batch_get()) && !isset($batch['id'])) {
// Some previous submit handler has set a batch. To ensure correct
// execution order, store the call in a special 'control' batch set.
// See _batch_next_set().
$batch['sets'][] = array(
'form_submit' => $function,
);
$batch['has_form_submits'] = TRUE;
}
else {
$function($form, $form_state);
}
$return = TRUE;
}
return $return;
}