interface TransliterationInterface

MachineNameController.php in drupal/core/modules/system/lib/Drupal/system/MachineNameController.php

Contains \Drupal\system\MachineNameController.

interface TransliterationInterface {

  /**
   * Transliterates text from Unicode to US-ASCII.
   *
   * @param string $string
   *   The string to transliterate.
   * @param string $langcode
   *   (optional) The language code of the language the string is in. Defaults
   *   to 'en' if not provided.
   * @param string $unknown_character
   *   (optional) The character to substitute for characters in $string without
   *   transliterated equivalents. Defaults to '?'.
   *
   * @return string
   *   $string with non-US-ASCII characters transliterated to US-ASCII
   *   characters, and unknown characters replaced with $unknown_character.
   */
  public function transliterate($string, $langcode = 'en', $unknown_character = '?');

}