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1. drupal
   1. drupal7

Menu callback for AHAH callbacks through the #ahah['callback'] FAPI property.

Verwandte Themen

Form generation

Functions to enable the processing and display of HTML forms.

Code

includes/form.inc, line 1780

<?php
function form_ahah_callback() {
  $form_state = form_state_defaults();

  $form_build_id = $_POST['form_build_id'];

  // Get the form from the cache.
  $form = form_get_cache($form_build_id, $form_state);
  if (!$form) {
    // If $form cannot be loaded from the cache, the form_build_id in $_POST must
    // be invalid, which means that someone performed a POST request onto
    // system/ahah without actually viewing the concerned form in the browser.
    // This is likely a hacking attempt as it never happens under normal
    // circumstances, so we just do nothing.
    exit;
  }

  // We will run some of the submit handlers so we need to disable redirecting.
  $form['#redirect'] = FALSE;

  // We need to process the form, prepare for that by setting a few internals
  // variables.
  $form_state['input'] = $_POST;
  $form_state['args'] = $form['#args'];
  $form_id = $form['#form_id'];

  // Build, validate and if possible, submit the form.
  drupal_process_form($form_id, $form, $form_state);

  // This call recreates the form relying solely on the form_state that the
  // drupal_process_form set up.
  $form = drupal_rebuild_form($form_id, $form_state, $form_build_id);

  // Get the callback function from the clicked button.
  $callback = $form_state['clicked_button']['#ahah']['callback'];
  if (drupal_function_exists($callback)) {
    $callback($form, $form_state);
  }
}
?>