php获取屏幕分辨率的例子

例子，php获取屏幕分辨率。

<? 
 echo "<script type="text/javascript">var w = window.screen.width;document.cookie = "".$LOGIN_USER_ID."_sw = " + w;</script>";
    $SCREEN_WIDTH = $_COOKIE[$LOGIN_USER_ID."_sw"];
 switch(true)
 {
  case (int)$SCREEN_WIDTH-800<=0:
   $SHOW_VISIT_MSG = "";
      break;
  case (int)$SCREEN_WIDTH-1024<=0:
   $SHOW_VISIT_MSG = "，上次登录：".format_datetime_short($LAST_VISIT_TIME);
      break;
  default:
   $SHOW_VISIT_MSG = "登入办公系统，上次登录时间：".format_datetime($LAST_VISIT_TIME);
 }
 //@setcookie($LOGIN_USER_ID."_sw","");
?>