By default in a Drupal 8 form submitform($form, FormStateInterface $form_state) will handle the the submission of form values. However we can also add our own submit handlers easily with Drupal 8 form api. The below example explains that.
Add the custom submit handler function with class name in the $form[‘#submit’] array
Code to add custom submit handler to Drupal 8 form
namespace Drupal\lnformcontrol\Form; use Drupal\Core\Form\FormStateInterface; use Drupal\Core\Form\FormBase; class CustomHandler extends FormBase { public function getFormId() { return 'lnformcontrol_customhandler'; } public function buildForm(array $form, FormStateInterface $form_state) { $form['name'] = array( '#type' => 'textfield', '#title' => $this->t("Enter Your Name"), '#size' => 50, '#maxlength' => 50, '#description' => $this->t("Enter your name to check the value"), ); $form['submit'] = array( '#type' => 'submit', '#value' => $this->t("submit"), ); $form['#submit'][] = '::custom_submit_handler'; return $form; } public function custom_submit_handler(array &$form, FormStateInterface $form_state) { drupal_set_message("Custom submit handler executed"); } public function submitForm(array &$form, FormStateInterface $form_state) { drupal_set_message('Default submit handler executed'); } }
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gianlubettiGianluca
hi can i edit value ‘name’ in my custom_submit_handler ? for example add nome – date?