static function ischinese($s){        $allen = preg_match("/^[^/x80-/xff]+$/", $s);   //判断是否是英文        $allcn = preg_match("/^[".chr(0xa1)."-".chr(0xff)."]+$/",$s);  //判断是否是中文        if($allen){                return 'allen';          }else{                if($allcn){                     return 'allcn';                }else{                     return 'encn';                }          }                   }