<?php /** * Special-case enum attribute definition that lazy loads allowed frame targets */ class HTMLPurifier_AttrDef_HTML_FrameTarget extends HTMLPurifier_AttrDef_Enum { public $valid_values = false; // uninitialized value protected $case_sensitive = false; public function __construct() {} public function validate($string, $config, $context) { if ($this->valid_values === false) $this->valid_values = $config->get('Attr', 'AllowedFrameTargets'); return parent::validate($string, $config, $context); } }