PHP ?? - AJAX ? XML
PHP ? - AJAX ? XML
AJAX? ???? XML ??? ????? ??? ? ????.
AJAX XML ?
?? ?? ? ???? AJAX? ?? XML ???? ??? ?? ??? ?????.
?? ?? - HTML ???
? ???? ???? ???? CD? ???? "showCD()"?? ??? ?????. ? ??? "onchange" ???? ?? ??????:
<html>
<head>
<script>
function showCD(str)
{
if (str=="")
{
document.getElementById("txtHint").innerHTML="";
return;
}
if (window.XMLHttpRequest)
{
// IE7+, Firefox, Chrome, Opera, Safari 瀏覽器執(zhí)行
xmlhttp=new XMLHttpRequest();
}
else
{
// IE6, IE5 瀏覽器執(zhí)行
xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
}
xmlhttp.onreadystatechange=function()
{
if (xmlhttp.readyState==4 && xmlhttp.status==200)
{
document.getElementById("txtHint").innerHTML=xmlhttp.responseText;
}
}
xmlhttp.open("GET","getcd.php?q="+str,true);
xmlhttp.send();
}
</script>
</head>
<body>
<form>
Select a CD:
<select name="cds" onchange="showCD(this.value)">
<option value="">Select a CD:</option>
<option value="Bob Dylan">Bob Dylan</option>
<option value="Bonnie Tyler">Bonnie Tyler</option>
<option value="Dolly Parton">Dolly Parton</option>
</select>
</form>
<div id="txtHint"><b>CD info will be listed here...</b></div>
</body>
</html>showCD() ? ??? ?? ??? ?????.
·??????????????????????????????????????????????<建> · ??? ??? ? ???? ??
?? · ??? ??? ?? ???
· URL ?(q)? ????? ?????(???? ?? ?? ??? ??).
PHP ??
??? JavaScript? ?? ???? ?? ???? "getcd.php"?? ??? PHP ?????.
PHP ????? XML ?? "cd_catalog.xml"? ???? XML ??? ?? ??? ??? ? ??? HTML? ?????.
<?php
$q=$_GET["q"];
$xmlDoc = new DOMDocument();
$xmlDoc->load("cd_catalog.xml");
$x=$xmlDoc->getElementsByTagName('ARTIST');
for ($i=0; $i<=$x->length-1; $i++)
{
// 處理元素節(jié)點
if ($x->item($i)->nodeType==1)
{
if ($x->item($i)->childNodes->item(0)->nodeValue == $q)
{
$y=($x->item($i)->parentNode);
}
}
}
$cd=($y->childNodes);
for ($i=0;$i<$cd->length;$i++)
{
// 處理元素節(jié)點
if ($cd->item($i)->nodeType==1)
{
echo("<b>" . $cd->item($i)->nodeName . ":</b> ");
echo($cd->item($i)->childNodes->item(0)->nodeValue);
echo("<br>");
}
}
?>CD ??? JavaScript?? ???? ?? PHP ????? ??:
1. PHP? XML DOM ??? ?????.
2. JavaScript?? ??? ???? ???? ?? <artist> ???? ??? ????. ?? ??? ???? "txtHint" ?? ???? ?? ????
