Drupal 8.0.0 beta 12. More info: https://www.drupal.org/node/2514176

core/lib/Drupal/Component/Transliteration/TransliterationInterface.php

@@ -0,0 +1,54 @@
+<?php
+
+/**
+ * @file
+ * Contains \Drupal\Component\Transliteration\TransliterationInterface.
+ */
+
+namespace Drupal\Component\Transliteration;
+
+/**
+ * Defines an interface for classes providing transliteration.
+ *
+ * @ingroup transliteration
+ */
+interface TransliterationInterface {
+
+  /**
+   * Removes diacritics (accents) from certain letters.
+   *
+   * This only applies to certain letters: Accented Latin characters like
+   * a-with-acute-accent, in the UTF-8 character range of 0xE0 to 0xE6 and
+   * 01CD to 024F. Replacements that would result in the string changing length
+   * are excluded, as well as characters that are not accented US-ASCII letters.
+   *
+   * @param string $string
+   *   The string holding diacritics.
+   *
+   * @return string
+   *   $string with accented letters replaced by their unaccented equivalents.
+   */
+  public function removeDiacritics($string);
+
+  /**
+   * 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. Warning: this can be unfiltered user input.
+   * @param string $unknown_character
+   *   (optional) The character to substitute for characters in $string without
+   *   transliterated equivalents. Defaults to '?'.
+   * @param int $max_length
+   *   (optional) If provided, return at most this many characters, ensuring
+   *   that the transliteration does not split in the middle of an input
+   *   character's transliteration.
+   *
+   * @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 = '?', $max_length = NULL);
+}