public function RegexpValidator::validate in Form API Validation 8.2

Execute validation.

Parameters

\Drupal\fapi_validation\Validator $validator: Validator.

array $element: Form Element.

\Drupal\Core\Form\FormStateInterface $form_state: Form State.

Return value

bool Check.

Overrides FapiValidationValidatorsInterface::validate

File

src/Plugin/FapiValidationValidator/RegexpValidator.php, line 22

Class

RegexpValidator

Fapi Validation Plugin for Regex validation.

Namespace

Drupal\fapi_validation\Plugin\FapiValidationValidator

Code

public function validate(Validator $validator, array $element, FormStateInterface $form_state) {
  $params = $validator
    ->getParams();
  $value = $validator
    ->getValue();

  // Some FAPI elements types, such as those provided by the Date API module,
  // will come in as an array (with date in one element and time in another).
  // To handle this use-case we simply implode them into a string.
  if (is_array($value)) {

    // Using array filter ensures that empty array elements do not cause an
    // extra space to be added to the value. We can't use trim to fix this
    // issue cause trim will remove all trailing whitespace in a string,
    // which may be meaningful.
    $value = implode(' ', array_filter($value));
  }
  return (bool) preg_match($params[0], (string) $value);
}