函数原型
function drupal_process_form($form_id, &$form, &$form_state) { //-- }
1 初始化 $form_state['values']
$form_state['values'] = array();
2 把$form赋值给一个变量, 然后生成新的$form
form builder 函数主要以下作用
a 给每个表单元素加上必须的属性值
b 吧用户输入的值放到#value上
c, 调用每个表单元素的#process handler
d, 把用户输入的值放到$form_state['values']下面
$unprocessed_form = $form; $form = form_builder($form_id, $form, $form_state);
3 如果有用户输入 要验证之
if ($form_state['process_input']) { drupal_validate_form($form_id, $form, $form_state); }
4 如果没有错误 要重置form id static ?
if (!form_get_errors()) { // In case of errors, do not break HTML IDs of other forms. drupal_static_reset('drupal_html_id'); }
5 运行submit handler
if ($form_state['submitted'] && !form_get_errors() && !$form_state['rebuild']) { // Execute form submit handlers. form_execute_handlers('submit', $form, $form_state); }
6 生成form cache
if (!$form_state['rebuild'] && $form_state['cache'] && empty($form_state['no_cache'])) { form_set_cache($form['#build_id'], $unprocessed_form, $form_state); }
-- 这个函数很复杂 真的不懂