53 lines
1.3 KiB
PHP
53 lines
1.3 KiB
PHP
|
<?php
|
||
|
|
|
||
|
|
// must be called POST validation
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Adds rel="nofollow" to all outbound links. This transform is
|
||
|
|
* only attached if Attr.Nofollow is TRUE.
|
||
|
|
*/
|
||
|
|
class HTMLPurifier_AttrTransform_Nofollow extends HTMLPurifier_AttrTransform
|
||
|
|
{
|
||
|
|
/**
|
||
|
|
* @type HTMLPurifier_URIParser
|
||
|
|
*/
|
||
|
|
private $parser;
|
||
|
|
|
||
|
|
public function __construct()
|
||
|
|
{
|
||
|
|
$this->parser = new HTMLPurifier_URIParser();
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @param array $attr
|
||
|
|
* @param HTMLPurifier_Config $config
|
||
|
|
* @param HTMLPurifier_Context $context
|
||
|
|
* @return array
|
||
|
|
*/
|
||
|
|
public function transform($attr, $config, $context)
|
||
|
|
{
|
||
|
|
if (!isset($attr['href'])) {
|
||
|
|
return $attr;
|
||
|
|
}
|
||
|
|
|
||
|
|
// XXX Kind of inefficient
|
||
|
|
$url = $this->parser->parse($attr['href']);
|
||
|
|
$scheme = $url->getSchemeObj($config, $context);
|
||
|
|
|
||
|
|
if ($scheme->browsable && !$url->isLocal($config, $context)) {
|
||
|
|
if (isset($attr['rel'])) {
|
||
|
|
$rels = explode(' ', $attr['rel']);
|
||
|
|
if (!in_array('nofollow', $rels)) {
|
||
|
|
$rels[] = 'nofollow';
|
||
|
|
}
|
||
|
|
$attr['rel'] = implode(' ', $rels);
|
||
|
|
} else {
|
||
|
|
$attr['rel'] = 'nofollow';
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return $attr;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// vim: et sw=4 sts=4
|