通过AJAX传输变量(Transmitting variables via AJAX)

 目前我正在制作日历。 在日历旁边，我想要一个描述框，其中当用户单击日历中的日期时，应该显示有关该事件的更多信息。 
 
 我到现在为止：HTML / PHP： 
 
// Variables from MySQL request:    
$event
$date
$place
$start
$end

<button type="button" onclick="event_description()">$day</button>

<div id="details"></div>
 
 AJAX： 
 
function event_description() {
  var xhttp = new XMLHttpRequest();
  xhttp.onreadystatechange = function() {
    if (xhttp.readyState == 4 && xhttp.status == 200) {
      document.getElementById("details").innerHTML = xhttp.responseText;
    }
  };
  xhttp.open("GET", "kalender/description.php", true);
  xhttp.send();
}
 
 那么我该怎么做才能在description.php中使用MySQL变量？ 
 
 谢谢你的帮助！ 

I am working at a calendar at the moment. Next to the calendar I want to have a description box in which some more informations about the event should be displayed when the user clicks on the date in the calendar.
 
What I have until now: HTML/PHP:
 
// Variables from MySQL request:    
$event
$date
$place
$start
$end

<button type="button" onclick="event_description()">$day</button>

<div id="details"></div>
 
AJAX:
 
function event_description() {
  var xhttp = new XMLHttpRequest();
  xhttp.onreadystatechange = function() {
    if (xhttp.readyState == 4 && xhttp.status == 200) {
      document.getElementById("details").innerHTML = xhttp.responseText;
    }
  };
  xhttp.open("GET", "kalender/description.php", true);
  xhttp.send();
}
 
So what can I do so I can use the MySQL variables in the description.php?
 
Thanks for your help!

原文：https://stackoverflow.com/questions/37254992