我是rss提要和php分页的新手。我正在尝试解析rss提要，并在单独的页面上显示每个提要的详细信息。我从中复制并粘贴了分页代码http://www.phpeasystep.com/phptu/29.html.当我在localhost上运行index.php时，不会显示任何内容。
我使用curl下载rss提要没有问题。我还尝试过print_r（$data），数据显示良好。
有人能告诉我哪里出了问题吗？非常感谢。
我的代码：
<?php
if (function_exists("curl_init")){
$ch=curl_init();
curl_setopt($ch,CURLOPT_URL,"http://feeds.feedburner.com/rb286");
curl_setopt($ch,CURLOPT_RETURNTRANSFER,1);
$data=curl_exec($ch);
curl_close($ch);
$doc=new SimpleXmlElement($data);
//print_r($doc);
}
function parseRSS($xml){
$items=$xml->xPath('/rss/channels/item');
$count=count($items);
// How many adjacent pages should be shown on each side?
$adjacents =3;
$total_pages = $count;
/* Setup vars for query. */
$targetpage = "index.php"; //your file name (the name of this file)
$limit = 1; //how many items to show per page
$page = $_GET['page'];
if($page)
$start = ($page - 1) * $limit; //first item to display on this page
else
$start = 0; //if no page var is given, set start to 0
/* Setup page vars for display. */
if ($page == 0) $page = 1; //if no page var is given, default to 1.
$prev = $page - 1; //previous page is page - 1
$next = $page + 1; //next page is page + 1
$lastpage = ceil($total_pages/$limit); //lastpage is = total pages / items per page, rounded up.
$lpm1 = $lastpage - 1; //last page minus 1
/*
Now we apply our rules and draw the pagination object.
We're actually saving the code to a variable in case we want to draw it more than once.
*/
$pagination = "";
if($lastpage > 1)
{
$pagination .= "<div class='"pagination'">";
//previous button
if ($page > 1)
$pagination.= "<a href='"$targetpage?page=$prev'">� previous</a>";
else
$pagination.= "<span class='"disabled'">� previous</span>";
//pages
if ($lastpage < 7 + ($adjacents * 2)) //not enough pages to bother breaking it up
{
for ($counter = 1; $counter <= $lastpage; $counter++)
{
if ($counter == $page)
$pagination.= "<span class='"current'">$counter</span>";
else
$pagination.= "<a href='"$targetpage?page=$counter'">$counter</a>";
}
}
elseif($lastpage > 5 + ($adjacents * 2)) //enough pages to hide some
{
//close to beginning; only hide later pages
if($page < 1 + ($adjacents * 2))
{
for ($counter = 1; $counter < 4 + ($adjacents * 2); $counter++)
{
if ($counter == $page)
$pagination.= "<span class='"current'">$counter</span>";
else
$pagination.= "<a href='"$targetpage?page=$counter'">$counter</a>";
}
$pagination.= "...";
$pagination.= "<a href='"$targetpage?page=$lpm1'">$lpm1</a>";
$pagination.= "<a href='"$targetpage?page=$lastpage'">$lastpage</a>";
}
//in middle; hide some front and some back
elseif($lastpage - ($adjacents * 2) > $page && $page > ($adjacents * 2))
{
$pagination.= "<a href='"$targetpage?page=1'">1</a>";
$pagination.= "<a href='"$targetpage?page=2'">2</a>";
$pagination.= "...";
for ($counter = $page - $adjacents; $counter <= $page + $adjacents; $counter++)
{
if ($counter == $page)
$pagination.= "<span class='"current'">$counter</span>";
else
$pagination.= "<a href='"$targetpage?page=$counter'">$counter</a>";
}
$pagination.= "...";
$pagination.= "<a href='"$targetpage?page=$lpm1'">$lpm1</a>";
$pagination.= "<a href='"$targetpage?page=$lastpage'">$lastpage</a>";
}
//close to end; only hide early pages
else
{
$pagination.= "<a href='"$targetpage?page=1'">1</a>";
$pagination.= "<a href='"$targetpage?page=2'">2</a>";
$pagination.= "...";
for ($counter = $lastpage - (2 + ($adjacents * 2)); $counter <= $lastpage; $counter++)
{
if ($counter == $page)
$pagination.= "<span class='"current'">$counter</span>";
else
$pagination.= "<a href='"$targetpage?page=$counter'">$counter</a>";
}
}
}
//next button
if ($page < $counter - 1)
$pagination.= "<a href='"$targetpage?page=$next'">next �</a>";
else
$pagination.= "<span class='"disabled'">next �</span>";
$pagination.= "</div>'n";
}
foreach($items as $item){
echo("<a href='".$item[0]->link."'>".$item[0]->title."</a>");
}
}
if (isset($doc->channel))parseRSS($doc);
?>
<?php
echo($pagination);
?>
</body>
好的，所以这个代码有一些问题：
首先，变量$pagination;在函数内创建，因此在全局范围外不可用。快速解决方法是：
在页面开头添加：
<?php
$pagination = '';
在功能内部添加：
function parseRSS($xml){
global $pagination;
接下来Xpath位置错误
更改：
$items=$xml->xPath('/rss/channels/item');
进入
$items=$xml->xPath('/rss/channel/item');
这些更改应该会给你一些开始的输出，我认为你的分页还有更多的问题，但一旦你有了一些输出，你应该设法解决它。
编辑：要只获得所需的链接，您应该更改：
<?php
foreach($items as $item){
echo("<a href='".$item[0]->link."'>".$item[0]->title."</a>");
}
进入：
<?php
foreach($items as $key => $item){
if( ( $key >= $start) && ($key < $start + $limit) ){
echo("<a href='".$item[0]->link."'>".$item[0]->title."</a>");
}
}
DonSeba，您的第二个foreach循环运行良好。每个链接都在不同的页面上显示良好。然而，你能告诉我你的if声明有两个条件的目的是什么吗？我尝试了以下只有1如果条件，它也工作得很好：
foreach($items as $key => $item){
//if( ( $key >= $start) && ($key < $start + $limit) ){ //your if statement
if ($key==$start){
echo("<a href='".$item[0]->link."'>".$item[0]->title."</a>");
}
}
谢谢。