DrupalVariable.php

<?php

namespace Drupal\devel\Plugin\Devel\Dumper;

use Drupal\Component\Utility\Variable;
use Drupal\Component\Utility\Xss;
use Drupal\devel\DevelDumperBase;

/**
 * Provides a DrupalVariable dumper plugin.
 *
 * @DevelDumper(
 *   id = "drupal_variable",
 *   label = @Translation("Drupal variable."),
 *   description = @Translation("Wrapper for <a href='https://api.drupal.org/api/drupal/core%21lib%21Drupal%21Component%21Utility%21Variable.php/class/Variable/8'>Drupal Variable</a> class.")
 * )
 */
class DrupalVariable extends DevelDumperBase {
    
    /**
     * {@inheritdoc}
     */
    public function export($input, $name = NULL) {
        $name = $name ? $name . ' => ' : '';
        $dump = Variable::export($input);
        // Run Xss::filterAdmin on the resulting string to prevent
        // cross-site-scripting (XSS) vulnerabilities.
        $dump = Xss::filterAdmin($dump);
        $dump = '<pre>' . $name . $dump . '</pre>';
        return $this->setSafeMarkup($dump);
    }
    
    /**
     * {@inheritdoc}
     */
    public function exportAsRenderable($input, $name = NULL) {
        $output['container'] = [
            '#type' => 'details',
            '#title' => $name ?: $this->t('Variable'),
            '#attached' => [
                'library' => [
                    'devel/devel',
                ],
            ],
            '#attributes' => [
                'class' => [
                    'container-inline',
                    'devel-dumper',
                    'devel-selectable',
                ],
            ],
            'export' => [
                '#markup' => $this->export($input),
            ],
        ];
        return $output;
    }
    
    /**
     * {@inheritdoc}
     */
    public static function checkRequirements() {
        return TRUE;
    }

}