function _form_validate in Drupal 4

Same name and namespace in other branches

1. 5 includes/form.inc \_form_validate()
2. 6 includes/form.inc \_form_validate()
3. 7 includes/form.inc \_form_validate()

Related topics

1 call to _form_validate()

drupal_validate_form in includes/form.inc

File

includes/form.inc, line 219

Code

function _form_validate($elements, $form_id = NULL) {

  // Recurse through all children.
  foreach (element_children($elements) as $key) {
    if (isset($elements[$key]) && $elements[$key]) {
      _form_validate($elements[$key]);
    }
  }

  /* Validate the current input */
  if (!$elements['#validated']) {
    if (isset($elements['#needs_validation'])) {

      // An empty textfield returns '' so we use empty(). An empty checkbox
      // and a textfield could return '0' and empty('0') returns TRUE so we
      // need a special check for the '0' string.
      if ($elements['#required'] && empty($elements['#value']) && $elements['#value'] !== '0') {
        form_error($elements, t('%name field is required.', array(
          '%name' => $elements['#title'],
        )));
      }

      // Add legal choice check if element has #options. Can be skipped, but then you must validate your own element.
      if (isset($elements['#options']) && isset($elements['#value']) && !isset($elements['#DANGEROUS_SKIP_CHECK'])) {
        if ($elements['#type'] == 'select') {
          $options = form_options_flatten($elements['#options']);
        }
        else {
          $options = $elements['#options'];
        }
        if (is_array($elements['#value'])) {
          $value = $elements['#type'] == 'checkboxes' ? array_keys(array_filter($elements['#value'])) : $elements['#value'];
          foreach ($value as $v) {
            if (!isset($options[$v])) {
              form_error($elements, t('An illegal choice has been detected. Please contact the site administrator.'));
              watchdog('form', t('Illegal choice %choice in %name element.', array(
                '%choice' => theme('placeholder', check_plain($v)),
                '%name' => theme('placeholder', empty($elements['#title']) ? $elements['#parents'][0] : $elements['#title']),
              )), WATCHDOG_ERROR);
            }
          }
        }
        elseif (!isset($options[$elements['#value']])) {
          form_error($elements, t('An illegal choice has been detected. Please contact the site administrator.'));
          watchdog('form', t('Illegal choice %choice in %name element.', array(
            '%choice' => theme('placeholder', $elements['#value']),
            '%name' => theme('placeholder', empty($elements['#title']) ? $elements['#parents'][0] : $elements['#title']),
          )), WATCHDOG_ERROR);
        }
      }
    }

    // User-applied checks.
    if (isset($elements['#validate'])) {
      foreach ($elements['#validate'] as $function => $args) {
        $args = array_merge(array(
          $elements,
        ), $args);

        // for the full form we hand over a copy of $form_values
        if (isset($form_id)) {
          $args = array_merge(array(
            $form_id,
            $GLOBALS['form_values'],
          ), $args);
        }
        if (function_exists($function)) {
          call_user_func_array($function, $args);
        }
      }
    }
    $elements['#validated'] = TRUE;
  }
}