RSS(Really Simple Syndication)是一種描述和同步網(wǎng)站內(nèi)容的格式,是使用最廣泛的XML應(yīng)用。RSS搭建了信息迅速傳播的一個(gè)技術(shù)平臺(tái),使得每個(gè)人都成為潛在的信息提供者。
本文實(shí)例為大家分享了php ajax異步讀取rss文檔數(shù)據(jù)的相關(guān)代碼,供大家參考,具體內(nèi)容如下
代碼如下:
index.html
<html>
<head>
<script>
function showRSS(str) {
if (str.length==0) {
document.getElementById("output").innerHTML="";
return;
}
if (window.XMLHttpRequest) {
xmlhttp=new XMLHttpRequest();
}
else
{
xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
}
xmlhttp.onreadystatechange=function() {
if (xmlhttp.readyState==4 && xmlhttp.status==200) {
document.getElementById("output").innerHTML=xmlhttp.responseText;
}
}
xmlhttp.open("GET","rss.php?q="+str,true);
xmlhttp.send();
}
</script>
</head>
<body>
<p>Please Select an option to get RSS:</p>
<form>
<select onchange="showRSS(this.value)">
<option value="">Select an RSS-feed:</option>
<option value="cnn">CNN</option>
<option value="bbc">BBC News</option>
<option value="pc">PC World</option>
</select>
</form>
<br>
<div id="output">RSS-feeds</div>
</body>
</html>
rss.php
<?php
$q=$_GET["q"];
if($q=="cnn") {
$xml=("http://rss.cnn.com/rss/cnn_topstories.rss");
}
elseif($q=="bbc") {
$xml=("http://newsrss.bbc.co.uk/rss/newsonline_world_edition/americas/rss.xml");
}
elseif($q="pcw"){
$xml=("http://www.pcworld.com/index.rss");
}
$xmlDoc = new DOMDocument();
$xmlDoc->load($xml);
$channel=$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;
echo("<p><a href='" . $channel_link . "'>" . $channel_title . "</a>");
echo("<br>");
echo($channel_desc . "</p>");
$x=$xmlDoc->getElementsByTagName('item');
for ($i=0; $i<=2; $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>");
}
?>
以上就是本文的全部內(nèi)容,希望對(duì)大家學(xué)習(xí)php程序設(shè)計(jì)有所幫助。