migrate_spip-1.0.0/src/Plugin/SpipRichText/ChevronSolitary.php

<?php

declare(strict_types=1);

namespace Drupal\migrate_spip\Plugin\SpipRichText;

use Drupal\Core\StringTranslation\TranslatableMarkup;
use Drupal\migrate_spip\Attribute\SpipRichText;
use Drupal\migrate_spip\SpipRichTextBase;

/**
 * Replace chevron solitary to prevent opened tag.
 */
#[SpipRichText(
  id: 'chevron_solitary',
  label: new TranslatableMarkup('Chevron solitary'),
  weight: -20,
)]
final class ChevronSolitary extends SpipRichTextBase {

  /**
   * {@inheritdoc}
   */
  public function apply(string $text): string {
    return preg_replace(
      [
        '#<(?=[^a-z/!])#Uims',
        '#<([^><"\'!]*)(?=<|$)#Uims',
      ],
      [
        '&lt;',
        '&lt;$1',
      ],
        $text
    );
  }

}