mirror of
https://github.com/friendica/friendica
synced 2024-11-16 04:53:56 +00:00
33 lines
724 B
PHP
33 lines
724 B
PHP
|
<?php
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Validates based on {ident} CSS grammar production
|
||
|
|
*/
|
||
|
|
class HTMLPurifier_AttrDef_CSS_Ident extends HTMLPurifier_AttrDef
|
||
|
|
{
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @param string $string
|
||
|
|
* @param HTMLPurifier_Config $config
|
||
|
|
* @param HTMLPurifier_Context $context
|
||
|
|
* @return bool|string
|
||
|
|
*/
|
||
|
|
public function validate($string, $config, $context)
|
||
|
|
{
|
||
|
|
$string = trim($string);
|
||
|
|
|
||
|
|
// early abort: '' and '0' (strings that convert to false) are invalid
|
||
|
|
if (!$string) {
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
|
||
|
|
$pattern = '/^(-?[A-Za-z_][A-Za-z_\-0-9]*)$/';
|
||
|
|
if (!preg_match($pattern, $string)) {
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
return $string;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// vim: et sw=4 sts=4
|