PHP ?? ?? ???? ?? ??
1. ?? ??? ?? ??
??? ??? ???? XMLHttpRequest ??? responseText ?? responseXML ??? ??? ? ????.
2. responseText ??
?? ??? XML? ?? ?? responseText ??? ??????.
responseText ??? ??? ???? ????? ??? ?? ??? ? ????.
4_1.php? ???? 4_2.txt?? ??? ????.
4_1.php ??
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<script>
function loadXMLDoc()
{
var xmlhttp;
if (window.XMLHttpRequest)
{// code for IE7+, Firefox, Chrome, Opera, Safari
xmlhttp=new XMLHttpRequest();
}
else
{// code for IE6, IE5
xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
}
xmlhttp.onreadystatechange=function()
{
if (xmlhttp.readyState==4 && xmlhttp.status==200)
{
document.getElementById("myDiv").innerHTML=xmlhttp.responseText;
}
}
xmlhttp.open("GET","4_2.txt",true);
xmlhttp.send();
}
</script>
</head>
<body>
<h2>AJAX</h2>
<button type="button" onclick="loadXMLDoc()">通過AJAX改變內(nèi)容</button>
<div id="myDiv">AJAX</div>
</body>
</html>4_2.txt ??
* AJAX 是一種用于創(chuàng)建快速動態(tài)網(wǎng)頁的技術(shù)。
3.responseXML ??
??? ??? XML?? XML ??? ?? ???? ?? ?? responseXML ??? ?????.
4_4.xml ??? ???? ??? ?? ?????(???? ??? , ? ????. 4_3.php ???? ?? ???? ?? 4_4.xml )? ?? ???? ????.
4_3.php ??
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<script>
function loadXMLDoc()
{
var xmlhttp;
var txt,x,i;
if (window.XMLHttpRequest)
{// code for IE7+, Firefox, Chrome, Opera, Safari
xmlhttp=new XMLHttpRequest();
}
else
{// code for IE6, IE5
xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
}
xmlhttp.onreadystatechange=function()
{
if (xmlhttp.readyState==4 && xmlhttp.status==200)
{
xmlDoc=xmlhttp.responseXML;
txt="";
x=xmlDoc.getElementsByTagName("title");
for(i=0;i<x.length;i++){
txt=txt+x[i].childNodes[0].nodeValue+"<br/>";
}
document.getElementById("myDiv").innerHTML=txt
}
}
xmlhttp.open("GET","4_4.xml",true);
xmlhttp.send();
}
</script>
</head>
<body>
<h2>AJAX</h2>
<button type="button" onclick="loadXMLDoc()">通過AJAX改變內(nèi)容</button>
<div id="myDiv">AJAX</div>
</body>
</html>4_4.xml ??
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