public FormValidatorInterface::validateForm($form_id, &$form, FormStateInterface &$form_state)
Validates user-submitted form data in the $form_state.
$form_id: A unique string identifying the form for validation, submission, theming, and hook_form_alter functions.
$form: An associative array containing the structure of the form, which is passed by reference. Form validation handlers are able to alter the form structure (like #process and #after_build callbacks during form building) in case of a validation error. If a validation handler alters the form structure, it is responsible for validating the values of changed form elements in $form_state->getValues() to prevent form submit handlers from receiving unvalidated values.
$form_state: The current state of the form. The current user-submitted data is stored in $form_state->getValues(), though form validation functions are passed an explicit copy of the values for the sake of simplicity. Validation handlers can also use $form_state to pass information on to submit handlers. For example: $form_state->set('data_for_submission', $data); This technique is useful when validation requires file parsing, web service requests, or other expensive requests that should not be repeated in the submission step.
public function validateForm($form_id, &$form, FormStateInterface &$form_state);
© 2001–2016 by the original authors
Licensed under the GNU General Public License, version 2 and later.
Drupal is a registered trademark of Dries Buytaert.