处理 $Behind[select top 10 title as tt,filepath,filename from web_userform_web where sortid=26 and charindex(substring('AJAX 请求区分 $_SERVER['HTTP_X_REQUESTED_WITH'] 小解',0,charindex(',','AJAX 请求区分 $_SERVER['HTTP_X_REQUESTED_WITH'] 小解')),keyword)>0 |10]$ 标签时出现如下错误：'HTTP_X_REQUESTED_WITH' 附近有语法错误。