search_api-8.x-1.15/src/Plugin/search_api/processor/Resources/Pi.php

<?php

namespace Drupal\search_api\Plugin\search_api\processor\Resources;

/**
 * Represents characters of the category "Pi" ("Punctuation, Initial quote").
 */
class Pi implements UnicodeCharacterPropertyInterface {

  /**
   * {@inheritdoc}
   */
  public static function getRegularExpression() {
    // phpcs:disable
    return
      '\x{00AB}\x{2018}\x{201B}\x{201C}\x{201F}\x{2039}\x{2E02}' .
      '\x{2E04}\x{2E09}\x{2E0C}\x{2E1C}\x{2E20}';
    // phpcs:enable
  }

}