mirror of
https://github.com/ezyang/htmlpurifier.git
synced 2024-12-25 01:31:53 +00:00
38 lines
1.0 KiB
PHP
38 lines
1.0 KiB
PHP
<?php
|
|
|
|
// must be called POST validation
|
|
|
|
/**
|
|
* Adds rel="noreferrer" to any links which target a different window
|
|
* than the current one. This is used to prevent malicious websites
|
|
* from silently replacing the original window, which could be used
|
|
* to do phishing.
|
|
* This transform is controlled by %HTML.TargetNoreferrer.
|
|
*/
|
|
class HTMLPurifier_AttrTransform_TargetNoreferrer extends HTMLPurifier_AttrTransform
|
|
{
|
|
/**
|
|
* @param array $attr
|
|
* @param HTMLPurifier_Config $config
|
|
* @param HTMLPurifier_Context $context
|
|
* @return array
|
|
*/
|
|
public function transform($attr, $config, $context)
|
|
{
|
|
if (isset($attr['rel'])) {
|
|
$rels = explode(' ', $attr['rel']);
|
|
} else {
|
|
$rels = array();
|
|
}
|
|
if (isset($attr['target']) && !in_array('noreferrer', $rels)) {
|
|
$rels[] = 'noreferrer';
|
|
}
|
|
if (!empty($rels) || isset($attr['rel'])) {
|
|
$attr['rel'] = implode(' ', $rels);
|
|
}
|
|
|
|
return $attr;
|
|
}
|
|
}
|
|
|