library/HTMLPurifier/StringHash.php

   1 <?php
   2
   3 /**
   4  * This is in almost every respect equivalent to an array except
   5  * that it keeps track of which keys were accessed.
   6  *
   7  * @warning For the sake of backwards compatibility with early versions
   8  *     of PHP 5, you must not use the $hash[$key] syntax; if you do
   9  *     our version of offsetGet is never called.
  10  */
  11 class HTMLPurifier_StringHash extends ArrayObject
  12 {
  13     protected $accessed = array();
  14
  15     /**
  16      * Retrieves a value, and logs the access.
  17      */
  18     public function offsetGet($index) {
  19         $this->accessed[$index] = true;
  20         return parent::offsetGet($index);
  21     }
  22
  23     /**
  24      * Returns a lookup array of all array indexes that have been accessed.
  25      * @return Array in form array($index => true).
  26      */
  27     public function getAccessed() {
  28         return $this->accessed;
  29     }
  30
  31     /**
  32      * Resets the access array.
  33      */
  34     public function resetAccessed() {
  35         $this->accessed = array();
  36     }
  37 }
  38
  39 // vim: et sw=4 sts=4