PHP记录IP,时间,想加个分辨率怎么解决能写入TXT

<?php
header('Content-type: text/html; charset=utf-8');
$time = date('Y-m-d H:i:s',time());
$ip = $_SERVER["REMOTE_ADDR"];
$file = fopen("ua.txt",  "a+");
fwrite( $file, "($time|$ip|)\r\n");
?>

还差个分辨率写入txt有什么方法  js只能显示出来 如何变成PHP输出到TXT

<script language="JavaScript" type="text/javascript">
                        document.write("&nbsp;&nbsp分辨率&nbsp;&nbsp");
                        document.write(window.screen.width + "×" + window.screen.height);
</script>

//根据这个代码改进一下
function download(name, data) {
    var urlObject = window.URL || window.webkitURL || window;

    var downloadData = new Blob([data]);

    var save_link = document.createElementNS("http://www.w3.org/1999/xhtml", "a")
    save_link.href = urlObject.createObjectURL(downloadData);
    save_link.download = name;
    fake_click(save_link);
}
//调用方法
download("save.txt","内容");