DevelExecutePHP.php

<?php

namespace Drupal\devel\Plugin\Block;

use Drupal\Core\Access\AccessResult;
use Drupal\Core\Block\BlockBase;
use Drupal\Core\Session\AccountInterface;

/**
 * Provides a block for executing PHP code.
 *
 * @Block(
 *   id = "devel_execute_php",
 *   admin_label = @Translation("Execute PHP")
 * )
 */
class DevelExecutePHP extends BlockBase {
    
    /**
     * {@inheritdoc}
     */
    protected function blockAccess(AccountInterface $account) {
        return AccessResult::allowedIfHasPermission($account, 'execute php code');
    }
    
    /**
     * {@inheritdoc}
     */
    public function build() {
        return \Drupal::formBuilder()->getForm('Drupal\\devel\\Form\\ExecutePHP');
    }

}