Drupal\Core\Form\FormValidatorInterface | Drupal Core API Explorer

interface FormValidatorInterface (View source)

Provides an interface for validating form submissions.

Methods

executeValidateHandlers($form, FormStateInterface $form_state)

Executes custom validation handlers for a given form.

validateForm($form_id, $form, FormStateInterface $form_state)

Validates user-submitted form data in the $form_state.

$this

setInvalidTokenError(FormStateInterface $form_state)

Sets a form_token error on the given form state.

Executes custom validation handlers for a given form.

Button-specific handlers are checked first. If none exist, the function falls back to form-level handlers.

	$form	An associative array containing the structure of the form.
FormStateInterface	$form_state	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.

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.
FormStateInterface	$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.

Sets a form_token error on the given form state.

$form_state

The current state of the form.

$this