PHP AJAX RSS
RSS ??? ?? ?? RSS ?????.
RSS? ???? ??? ????? ??? ??? ? ????.
AJAX RSS ??
?? ???? RSS ??? ?????. , ? ???? ?? ??? ?? RSS ???? ???? ??:
?
???? ?? ???? ???? RSS ??? ???? "showRSS()"?? ??? ?????. ? ??? "onchange" ???? ?? ??????:
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>PHP中文網(wǎng)(php.cn)</title>
<script>
function showRSS(str)
{
if (str.length==0)
{
document.getElementById("rssOutput").innerHTML="";
return;
}
if (window.XMLHttpRequest)
{
// IE7+, Firefox, Chrome, Opera, Safari 瀏覽器執(zhí)行代碼
xmlhttp=new XMLHttpRequest();
}
else
{
// IE6, IE5 瀏覽器執(zhí)行代碼
xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
}
xmlhttp.onreadystatechange=function()
{
if (xmlhttp.readyState==4 && xmlhttp.status==200)
{
document.getElementById("rssOutput").innerHTML=xmlhttp.responseText;
}
}
xmlhttp.open("GET","getrss.php?q="+str,true);
xmlhttp.send();
}
</script>
</head>
<body>
<form>
<select onchange="showRSS(this.value)">
<option value="">選擇一個(gè) RSS-feed:</option>
<option value="rss">讀取 RSS 數(shù)據(jù)</option>
</select>
</form>
<br>
<div id="rssOutput">RSS-feed 數(shù)據(jù)列表...</div>
</body>
</html>showRSS() ??? ?? ??? ?????:
· RSS ??? ?????? ??
· XMLHttpRequest ?? ??
· ?? ??? ???? ???? ?? ??
· ??? ??? ?? ???
· ????? ?????( q) URL ?? ???(???? ??? ?? ??)
XML ??
<?xml version="1.0" encoding="UTF-8" ?> <rss version="2.0"> <channel> <title>php教程</title> <link>http://miracleart.cn</link> <description>學(xué)的不僅技術(shù)，更新夢(mèng)想??！</description> <item> <title>RSS 教程</title> <link>http://miracleart.cn/rss/rss-tutorial.html</link> <description>通過(guò)使用 RSS，您可以瀏覽與您的工作相關(guān)的新聞</description> </item> <item> <title>XML 教程</title> <link>http://miracleart.cn/xml/xml-tutorial.html</link> <description>XML 指可擴(kuò)展標(biāo)記語(yǔ)言（eXtensible Markup Language)</description> </item> </channel> </rss>
PHP ??
? JavaScript?? ???? ?? ???? "getrss.php"?? ??? PHP ?????.
<?php
header("Content-type:text/html;charset=utf-8"); //設(shè)置編碼
// rss 文件
$xml="rss_demo.xml";
$xmlDoc = new DOMDocument();
$xmlDoc->load($xml);
// 從 "<channel>" 中讀取元素
$channel=$xmlDoc->getElementsByTagName('channel')->item(0);
$channel_title = $channel->getElementsByTagName('title')
->item(0)->childNodes->item(0)->nodeValue;
$channel_link = $channel->getElementsByTagName('link')
->item(0)->childNodes->item(0)->nodeValue;
$channel_desc = $channel->getElementsByTagName('description')
->item(0)->childNodes->item(0)->nodeValue;
// 輸出 "<channel>" 中的元素
echo("<p><a href='" . $channel_link
. "'>" . $channel_title . "</a>");
echo("<br>");
echo($channel_desc . "</p>");
// 輸出 "<item>" 中的元素
$x=$xmlDoc->getElementsByTagName('item');
for ($i=0; $i<=1; $i++) {
$item_title=$x->item($i)->getElementsByTagName('title')
->item(0)->childNodes->item(0)->nodeValue;
$item_link=$x->item($i)->getElementsByTagName('link')
->item(0)->childNodes->item(0)->nodeValue;
$item_desc=$x->item($i)->getElementsByTagName('description')
->item(0)->childNodes->item(0)->nodeValue;
echo ("<p><a href='" . $item_link
. "'>" . $item_title . "</a>");
echo ("<br>");
echo ($item_desc . "</p>");
}
?>??? ?? ? RSS ??? JavaScript?? PHP ??? ???? ??? ?? ?? ?????.
· ?? RSS ??? ?????? ??
· ? XML DOM ?? ???
· XML ??
? RSS ??? ?????. ????
??? ???? ?????. ?? ????
??? ???? ?????. ???? ?? ??:
