我正在尝试构建HTML / PHP应用程序,在该应用程序中,您将RSS URL输入到表单字段中,然后由于进入rssfeed.php页面而在浏览器中检索RSS feed。目前,我收到一个错误file_get_contents() expects parameter 1 to be a valid path, array given in C:\xampp\htdocs\week14\rssfeed.php on line 2
这是我的index.html代码:
<html>
<body>
<form action="rssfeed.php" method="post">
Please enter the RSS feed URL: <input type="content" name="name"><br>
<input type="submit">
</form>
</body>
</html>
这里是rssfeed.php代码:
<?php
$content = file_get_contents($_POST);
?>
甚至都不知道要搜索什么,我是从头开始构建代码的新手。
所以这是显示espn的供稿的内容,但我需要对其进行集成,以便在将URL输入表单时将其放置在此代码段中的url当前所在的位置:
$feed_url = "http://rssfeeds.usatoday.com/UsatodaycomGolf-TopStories";
$content = file_get_contents($feed_url);
$x = new SimpleXmlElement($content);
echo '<ul>';
foreach($x->channel->item as $entry) {
echo '<li>';
echo '<a href="'.$entry->link.'" title="'.$entry->title.'" target="_blank">' . $entry->title . '</a>'; // output link & title
echo $entry->description; // return post content
echo '</li>';
}
echo "</ul>";
给出一个想法,您可以将一些RSSFeed
的URL发布到脚本中,然后对其进行处理,也许这可能有所帮助。
[通常要使用DOMDocument
或SimpleXML
处理RSSFeed的内容-此处的代码只是将远程XML文件直接直接加载到DOMDocument
中,并实例化XPath对象以进一步查询以查找节点。还有许多其他方法可以做到这一点-但很快就以示例形式编写了它。
<html>
<head>
<title>RSS</title>
</head>
<body>
<form method='post'>
<input type='text' name='name' value='https://www.huffingtonpost.co.uk/feeds/index.xml' />
<input type='submit'>
</form>
<?php
if( $_SERVER['REQUEST_METHOD']=='POST' && !empty( $_POST['name'] ) ){
$dom=new DOMDocument;
$dom->load( $_POST['name'] );
$xp=new DOMXPath( $dom );
$col=$xp->query( '//channel/item' );
if( $col->length > 0 ){
foreach( $col as $node ){
printf(
'<h3>%s</h3>',
$xp->query('title',$node)->item(0)->textContent
);
}
}
}
?>
</body>
</html>
输出片段:
<h3>Where To Travel In 2020: The Top 10 Emerging Destinations</h3>
<h3>Gavin And Stacey Christmas Special: First Reviews Of Reunion Episode Are In</h3>
<h3>Jeremy Corbyn Speaks To The Common People | The People's Election</h3>
一个更完整的示例,它显示了多个可能的RSS提要以及每篇文章中的更多字段:
<html>
<head>
<title>RSS</title>
</head>
<body>
<form method='post'>
<select name='name'>
<optgroup label='World news'>
<option>http://rssfeeds.usatoday.com/UsatodaycomGolf-TopStories
<option>http://feeds.reuters.com/Reuters/worldNews
<option>http://rss.cnn.com/rss/edition_world.rss
</optgroup>
<optgroup label='UK news'>
<option>http://feeds.bbci.co.uk/news/rss.xml
<option>http://feeds.skynews.com/feeds/rss/uk.xml
<option>http://feeds.reuters.com/reuters/UKdomesticNews
</optgroup>
<optgroup label='US news'>
<option>http://rssfeeds.usatoday.com/usatoday-newstopstories
<option>http://feeds.reuters.com/Reuters/domesticNews
<option>http://feeds.skynews.com/feeds/rss/us.xml
</optgroup>
<optgroup label='Miscellaneous'>
<option>https://www.wired.com/feed
<option>http://rss.slashdot.org/Slashdot/slashdot
<option>https://www.huffingtonpost.co.uk/feeds/index.xml
</optgroup>
</select>
<input type='submit'>
</form>
<?php
if( $_SERVER['REQUEST_METHOD']=='POST' && !empty( $_POST['name'] ) ){
$url=$_POST['name'];
$max=150;
$ellipsis=str_repeat('.',5);
$dom=new DOMDocument;
$dom->load( $url );
$xp=new DOMXPath( $dom );
$col=$xp->query( '//channel/item' );
if( $col->length > 0 ){
echo '<ul>';
foreach( $col as $node ){
try{
$description=$xp->evaluate('string(description)',$node);
if( strlen( $description ) > $max )$description=substr( $description, 0, $max ) . $ellipsis;
$category=$xp->evaluate( 'string(category)', $node );
printf(
'<li>
<a href="%s" target="_blank">%s</a>
<div>Category: %s</div>
<p>%s</p>
</li>',
$xp->evaluate( 'string(link)', $node ),
$xp->evaluate( 'string(title)',$node ),
$category,
$description
);
}catch( Exception $e ){
continue;
}
}
echo '</ul>';
} else {
echo 'nothing found for given XPath query';
}
}
?>
</body>
</html>
授予此权限仅读取http链接,而不读取https:
Index.html:
<!DOCTYPE html>
<html>
<head>
<link rel="stylesheet" href="styles.css" type="text/css">
<title>RSS Feed Search</title>
</head>
<body>
<h2>RSS Search</h2>
<form form action="rss.php" method="post">
<input type='text' name='name' value='' />
<input type='submit'>
</form>
</body>
</html>
rss.php:
<?php
if( $_SERVER['REQUEST_METHOD']=='POST' && !empty( $_POST['name'] ) ){
$feed_url = ( $_POST['name'] );
$content = file_get_contents($feed_url);
$x = new SimpleXmlElement($content);
echo '<ul>';
foreach($x->channel->item as $entry) {
echo '<li>';
echo '<a href="'.$entry->link.'" title="'.$entry->title.'" target="_blank">' . $entry->title . '</a>'; // output link & title
echo $entry->description; // return post content
echo '</li>';
}
echo "</ul>";
};
?>