library/HTMLPurifier/URIFilter.php

   1 <?php
   2
   3 /**
   4  * Chainable filters for custom URI processing.
   5  *
   6  * These filters can perform custom actions on a URI filter object,
   7  * including transformation or blacklisting.
   8  *
   9  * @warning This filter is called before scheme object validation occurs.
  10  *          Make sure, if you require a specific scheme object, you
  11  *          you check that it exists. This allows filters to convert
  12  *          proprietary URI schemes into regular ones.
  13  */
  14 class HTMLPurifier_URIFilter
  15 {
  16
  17     /**
  18      * Unique identifier of filter
  19      */
  20     var $name;
  21
  22     /**
  23      * Performs initialization for the filter
  24      */
  25     function prepare($config) {}
  26
  27     /**
  28      * Filter a URI object
  29      * @param &$uri Reference to URI object
  30      * @param $config Instance of HTMLPurifier_Config
  31      * @param &$context Instance of HTMLPurifier_Context
  32      * @return bool Whether or not to continue processing: false indicates
  33      *         URL is no good, true indicates continue processing. Note that
  34      *         all changes are committed directly on the URI object
  35      */
  36     function filter(&$uri, $config, &$context) {
  37         trigger_error('Cannot call abstract function', E_USER_ERROR);
  38     }
  39
  40 }