我找到了一个很好的教程：
tutorial
原文链接：https://www.f2er.com/ajax/160045.html但它在本地不起作用.
问题是,responsetext返回我的整个PHP代码.
我双击我的ajaxclock.html并使用Firefox.
令人惊讶的是,它适用于服务器.
这里的代码：
ajaxclock.html
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
<head>
<title>AJAX Tutorial</title>
</head>
<body>
<div id="time"></div>
<button onclick="getTime();">Aktualisieren</button>
<script type="text/javascript" src="script.js"></script>
</body>
</html>
的script.js
var req = getXmlHttpRequestObject();
window.onload = getTime();
function getXmlHttpRequestObject()
{
if(window.XMLHttpRequest)
{
return new XMLHttpRequest();
}
else if(window.ActiveXObject)
{
return new ActiveXObject("Microsoft.XMLHTTP");
}
else
{
alert('Ajax funktioniert bei Ihnen nicht!');
}
}
function getTime()
{
if(req.readyState == 4 || req.readyState == 0)
{
req.open('GET','ajaxclock.PHP',true);
req.setRequestHeader("Content-Type","text/plain");
req.onreadystatechange = setMessage;
req.send(null);
}
}
function setMessage()
{
if(req.readyState == 4)
{
var response = eval('(' + req.responseText+ ')');
document.getElementById('time').innerHTML = response.time;
}
}
ajaxclock.PHP
<?PHP echo '{"time": "'.date("H:i:s").'"}'; ?>
