SearchController.php

SearchController.php

<?php

namespace Drupal\custom_api\Controller;

use Drupal\Core\Controller\ControllerBase;

/**
 * Class SearchController.
 */
class SearchController extends ControllerBase {

  /**
   * Search.
   *
   * @return string
   *   Return Hello string.
   */
  public function search($search) {
    return [
      '#type' => 'markup',
      '#markup' => $this->t('Implement method: search with parameter(s): $search'),
    ];
  }

}