php怎么修复xss漏洞

使用php对xss漏洞进行修复，具体方法如下：

function search($query, $page)
{
global $db, $bgcolor2, $bgcolor4, $sitename, $io_db, $module_url, $list_page_items, $hm_index;
$option = trim($option);
$query = trim($query);
$query = FixQuotes(nl2br(filter_text($query)));
$db->escape_string($query);
$db->escape_string($option);
alpha_search($query);
$query = FixQuotes(nl2br(filter_text(htmlentities($query))));