In this article, I'll show you how to add multiple submit buttons using Form API in drupal 8.
to add many submit buttons to your form, juste add "#submit" property to every element like this:
$form['actions']['previous'] = array(
'#type' => 'submit',
'#submit' => array([$this, 'previousForm']),
'#value' => 'Previous',
'#limit_validation_errors' => array(), //no validation for back button
);
public static function previousForm(array &$form, FormStateInterface $form_state) {
//TODO: your code
}
or you can use it like this '#submit' => array('::previousForm').
#submit: Specifies an alternate callback for form submission when the submit button is pressed. Use '::methodName' format or an array containing the object and method name (for example, [ $this, 'methodName'] ).
Example
<?php
namespace Drupal\codimth_form_api\Form;
use Drupal\Core\Form\ConfigFormBase;
use Drupal\Core\Form\FormBase;
use Drupal\Core\Form\FormStateInterface;
use Drupal\Core\Url;
/**
* Implements a codimth Config Form API.
*/
class CodimthConfigForm extends ConfigFormBase
{
/**
* @return string
*/
public function getFormId()
{
return 'codimth_form_api_admin_settings';
}
/**
* Gets the configuration names that will be editable.
*
* @return array
* An array of configuration object names that are editable if called in
* conjunction with the trait's config() method.
*/
protected function getEditableConfigNames()
{
return [
'codimth_form_api.settings',
];
}
/**
* @param array $form
* @param FormStateInterface $form_state
* @return array
*/
public function buildForm(array $form, FormStateInterface $form_state)
{
$form['actions'] = [
'#type' => 'actions',
];
$form['actions']['submit1'] = [
'#type' => 'submit',
'#value' => $this->t('Submit One'),
"#weight" => 1,
'#submit' => array([$this, 'submitFormOne']),
'#limit_validation_errors' => array()
];
$form['actions']['submit2'] = [
'#type' => 'submit',
'#value' => $this->t('Submit Two'),
"#weight" => 2,
'#button_type' => 'primary',
'#submit' => array([$this, 'submitFormTwo']),
'#limit_validation_errors' => array()
];
return parent::buildForm($form, $form_state);
}
/**
* {@inheritdoc}
*/
public function submitForm(array &$form, FormStateInterface $form_state)
{
//TODO: write your code
parent::submitForm($form, $form_state);
}
/**
* {@inheritdoc}
*/
public function submitFormPreOne(array &$form, FormStateInterface $form_state)
{
//TODO: write your code
}
/**
* {@inheritdoc}
*/
public function submitFormTwo(array &$form, FormStateInterface $form_state)
{
//TODO: write your code
}
}
the result is like this:
