Ident.php

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<?php
 
class HTMLPurifier_AttrDef_CSS_Ident extends HTMLPurifier_AttrDef
{
 
    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