Resolve #3375949

Closes #3375949

config/sample.php

-<?php
-
-/**
- * @file
- * This file is a sample advanced PHP configuration file for the HTML Purifier
- * filter module. In reality, this file would be named N.php, where N is the
- * integer identifying the filter this is configuring. The configure page
- * for HTML Purifier (advanced) will tell you what file to copy this to.
- *
- * See this URI:
- *
- *    http://htmlpurifier.org/live/configdoc/plain.html
- *
- * For full information about permitted directives. The most interesting ones
- * for custom configuration are ones with the 'mixed' type, as they cannot
- * be configured using the webform.
- *
- * @note
- *    A number of directives have been predefined for you in order to better
- *    work with Drupal. You can see what these defaults in the
- *    _htmlpurifier_get_config() function in htmlpurifier.module.php.
- *
- * @warning
- *    Please be mindful of the version of HTML Purifier you have installed!
- *    All of the docs linked to are for the latest version of HTML Purifier;
- *    your installation may or may not be up-to-date.
- */
-
-/**
- * Accepts an HTMLPurifier_Config configuration object and configures it.
- *
- * @param $config
- *    Instance of HTMLPurifier_Config to modify. See
- *        http://htmlpurifier.org/doxygen/html/classHTMLPurifier__Config.html
- *    for a full API.
- *
- * @note
- *    No return value is needed, as PHP objects are passed by reference.
- */
-function htmlpurifier_config_N($config) {
-  // Set your configuration here:
-  $config->set('Core', 'Lexer', 'DirectLex');
-  // $config->set('Namespace', 'Directive', $value);
-
-  // Advanced users:
-  // $def = $config->getDefinition('HTML');
-  // For more information about this, see:
-  //    http://htmlpurifier.org/docs/enduser-customize.html
-}
-