我在这里是因为我在网页上遇到了一些麻烦。我的网页上显示了谷歌新闻RSS。我将XML代码（链接）与RSS_PARSER库（PHP）一起使用，并将其内容发送到我的数据库。在这个数据库上，它动态地存储了标题，描述，日期和时间以及MD5标题（我真的不知道这是什么）。存储在数据库中的内容必须显示在此网页上，但问题在于：自项目开始以来已创建了2个用户。当您使用这2个用户登录时，此页面显示存储在数据库中的RSS，但是当我从数据库创建新用户时，它没有显示任何内容，db不会自动创建这些注册表。这真的很奇怪，因为老用户创建的方式与最新用户相同。这个项目是由其他人创建的，我没有与他们联系过。这就是为什么我真的输了，我不明白为什么这不能正常工作，没有人改变代码。它应该工作正常！有任何想法吗？
这是我的库:(这一切都是用CodeIgniter制作的）
<?php if (!defined('BASEPATH')) exit('No direct script access allowed');
/*
* This class is written based entirely on the work found below
* www.techbytes.co.in/blogs/2006/01/15/consuming-rss-with-php-the-simple-way/
* All credit should be given to the original author
*
* Example:
$this->load->library('rssparser');
$this->rssparser->set_feed_url('http://example.com/feed');
$this->rssparser->set_cache_life(30);
$rss = $this->rssparser->getFeed(6); // Get six items from the feed
// Using a callback function to parse addictional XML fields
$this->load->library('rssparser', array($this, 'parseFile')); // parseFile method of current class
function parseFile($data, $item)
{
$data['summary'] = (string)$item->summary;
return $data;
}
*/
class RSSParser {
public $feed_uri = NULL; // Feed URI
public $data = FALSE; // Associative array containing all the feed items
public $channel_data = array(); // Store RSS Channel Data in an array
public $feed_unavailable = NULL; // Boolean variable which indicates whether an RSS feed was unavailable
public $cache_life = 0; // Cache lifetime
public $cache_dir = './application/cache/'; // Cache directory
public $write_cache_flag = FALSE; // Flag to write to cache
public $callback = FALSE; // Callback to read custom data
function __construct($callback = FALSE)
{
if ($callback)
{
$this->callback = $callback;
}
}
// --------------------------------------------------------------------
function parse()
{
// Are we caching?
if ($this->cache_life != 0)
{
$filename = $this->cache_dir.'rss_Parse_'.md5($this->feed_uri);
// Is there a cache file ?
if (file_exists($filename))
{
// Has it expired?
$timedif = (time() - filemtime($filename));
if ($timedif < ( $this->cache_life * 60))
{
$rawFeed = file_get_contents($filename);
}
else
{
// So raise the falg
$this->write_cache_flag = true;
}
}
else
{
// Raise the flag to write the cache
$this->write_cache_flag = true;
}
}
// Reset
$this->data = array();
$this->channel_data = array();
// Parse the document
if (!isset($rawFeed))
{
$rawFeed = file_get_contents($this->feed_uri);
}
$xml = new SimpleXmlElement($rawFeed);
if ($xml->channel)
{
// Assign the channel data
$this->channel_data['title'] = $xml->channel->title;
$this->channel_data['description'] = $xml->channel->description;
// Build the item array
foreach ($xml->channel->item as $item)
{
$data = array();
$data['title'] = (string)$item->title;
$data['description'] = (string)$item->description;
$data['pubDate'] = (string)$item->pubDate;
$data['link'] = (string)$item->link;
$dc = $item->children('http://purl.org/dc/elements/1.1/');
$data['author'] = (string)$dc->creator;
if ($this->callback)
{
$data = call_user_func($this->callback, $data, $item);
}
$this->data[] = $data;
}
}
else
{
// Assign the channel data
$this->channel_data['title'] = $xml->title;
$this->channel_data['description'] = $xml->subtitle;
// Build the item array
foreach ($xml->entry as $item)
{
$data = array();
$data['id'] = (string)$item->id;
$data['title'] = (string)$item->title;
$data['description'] = (string)$item->content;
$data['pubDate'] = (string)$item->published;
$data['link'] = (string)$item->link['href'];
$dc = $item->children('http://purl.org/dc/elements/1.1/');
$data['author'] = (string)$dc->creator;
if ($this->callback)
{
$data = call_user_func($this->callback, $data, $item);
}
$this->data[] = $data;
}
}
// Do we need to write the cache file?
if ($this->write_cache_flag)
{
if (!$fp = @fopen($filename, 'wb'))
{
echo "RSSParser error";
log_message('error', "Unable to write cache file: ".$filename);
return;
}
flock($fp, LOCK_EX);
fwrite($fp, $rawFeed);
flock($fp, LOCK_UN);
fclose($fp);
}
return TRUE;
}
// --------------------------------------------------------------------
function set_cache_life($period = NULL)
{
$this->cache_life = $period;
return $this;
}
// --------------------------------------------------------------------
function set_feed_url($url = NULL)
{
$this->feed_uri = $url;
return $this;
}
// --------------------------------------------------------------------
/* Return the feeds one at a time: when there are no more feeds return false
* @param No of items to return from the feed
* @return Associative array of items
*/
function getFeed($num)
{
$this->parse();
$c = 0;
$return = array();
foreach ($this->data AS $item)
{
$return[] = $item;
$c++;
if ($c == $num)
{
break;
}
}
return $return;
}
// --------------------------------------------------------------------
/* Return channel data for the feed */
function & getChannelData()
{
$flag = false;
if (!empty($this->channel_data))
{
return $this->channel_data;
}
else
{
return $flag;
}
}
// --------------------------------------------------------------------
/* Were we unable to retreive the feeds ? */
function errorInResponse()
{
return $this->feed_unavailable;
}
// --------------------------------------------------------------------
/* Initialize the feed data */
function clear()
{
$this->feed_uri = NULL;
$this->data = FALSE;
$this->channel_data = array();
$this->cache_life = 0;
$this->callback = FALSE;
return $this;
}
}