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<?php
class HTMLPurifier_URIFilter_DisableExternal extends HTMLPurifier_URIFilter
{
public $name = 'DisableExternal';
protected $ourHostParts = false;
public function prepare($config) {
$our_host = $config->getDefinition('URI')->host;
if ($our_host !== null) $this->ourHostParts = array_reverse(explode('.', $our_host));
}
public function filter(&$uri, $config, $context) {
if (is_null($uri->host)) return true;
if ($this->ourHostParts === false) return false;
$host_parts = array_reverse(explode('.', $uri->host));
foreach ($this->ourHostParts as $i => $x) {
if (!isset($host_parts[$i])) return false;
if ($host_parts[$i] != $this->ourHostParts[$i]) return false;
}
return true;
}
}
// vim: et sw=4 sts=4
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