php - 使用 php 在 depth2 中查找 RSS 提要

Question

这是我的代码：

<?php

$location = 'http://timesofindia.indiatimes.com//';
$html = file_get_contents($location);
echo getRSSLocation($html, $location); # http://hakre.wordpress.com/feed/

/**
 * @link http://keithdevens.com/weblog/archive/2002/Jun/03/RSSAuto-DiscoveryPHP
 */
function getRSSLocation($html, $location){
if(!$html or !$location){
return false;
}else{
#search through the HTML, save all <link> tags
# and store each link's attributes in an associative array
preg_match_all('/<link\s+(.*?)\s*\/?>/si', $html, $matches);
$links = $matches[1];
$final_links = array();
$link_count = count($links);
for($n=0; $n<$link_count; $n++){
    $attributes = preg_split('/\s+/s', $links[$n]);
    foreach($attributes as $attribute){
        $att = preg_split('/\s*=\s*/s', $attribute, 2);
        if(isset($att[1])){
            $att[1] = preg_replace('/([\'"]?)(.*)\1/', '$2', $att[1]);
            $final_link[strtolower($att[0])] = $att[1];
        }
    }
    $final_links[$n] = $final_link;
}
#now figure out which one points to the RSS file
for($n=0; $n<$link_count; $n++){
    if(strtolower($final_links[$n]['rel']) == 'alternate'){
        if(strtolower($final_links[$n]['type']) == 'application/rss+xml'){
            $href = $final_links[$n]['href'];
        }
        if(!$href and strtolower($final_links[$n]['type']) == 'text/xml'){
            #kludge to make the first version of this still work
            $href = $final_links[$n]['href'];
        }
        if($href){
            if(strstr($href, "http://") !== false){ #if it's absolute
                $full_url = $href;
            }else{ #otherwise, 'absolutize' it
                $url_parts = parse_url($location);
                #only made it work for http:// links. Any problem with this?
                $full_url = "http://$url_parts[host]";
                if(isset($url_parts['port'])){
                    $full_url .= ":$url_parts[port]";
                }
                if($href{0} != '/'){ #it's a relative link on the domain
                    $full_url .= dirname($url_parts['path']);
                    if(substr($full_url, -1) != '/'){
                        #if the last character isn't a '/', add it
                        $full_url .= '/';
                    }
                }
                $full_url .= $href;
            }
            return $full_url;
        }
    }
}
return false;
}
}

此代码只会在当前链接中找到 rss 提要，但该站点有一些内部选项卡，其中每个内部选项卡都有一个 rss 提要。如何修改我的代码以在内部选项卡中获取 rss 提要。