我正在制作一个定制的RSS提要，它在特定的名称空间中输出标签。当我输出时<pugpig:summary> 例如pugpig 部分消失了，我只剩下<summary> 在输出标记中。WordPress是如何做到这一点的？我如何才能阻止它？
以下是我的自定义提要逻辑：
add_action(\'init\', \'ns_add_custom_rss_feeds\');
function ns_add_custom_rss_feeds(){
ns_create_pugpig_feed();
ns_create_content_feed();
ns_create_issue_feed();
ns_create_google_currents_feed();
}
/**
* Create the new pugpig feed
* add_feed params: feed name and callback funcion
*/
function ns_create_pugpig_feed(){
add_feed(\'pugpig\', \'ns_get_pugpig_template\');
}
/**
* Callback function to create the feed
* get_template_part link to a separate template file to keep the functionality separate to the layout.
* the file will be: /wp-content/themes/template/rss-pugpig.php
*/
function ns_get_pugpig_template(){
get_template_part(\'rss2\', \'pugpig\');
}
这里是我输出标签的地方：
/**
* RSS2 Feed Template for displaying pugpig feed.
*
* @package newscientist
*/
//URL: http://www.newscientist.com/feed/pugpig (for current issue)
//URL: http://www.newscientist.com/feed/pugpig?issue=1234 (for a given issue)
$issue = get_query_var( \'issue\' );
if(empty($issue)){
//if the parameter "issue" is not in the URL, we take the current issue
$issue = ns_get_current_issue_number();
}
$issue_info = ns_get_issue_info($issue);
$volume = $issue_info -> field(\'volume\');
$args = array(
\'post_type\' => \'article\',
\'meta_query\' => array(
array(
\'key\' => \'issue_number\',
\'value\' => $issue
),
array(
\'key\' => \'pugpig\',
\'value\' => \'1\'
)
),
\'posts_per_page\'=>-1
);
//query posts by type, issue_number and pugpig flag
$posts = query_posts( $args );
echo \'<?xml version="1.0" encoding="\'.get_option(\'blog_charset\').\'"?\'.\'>\';
<rss xmlns:content="http://purl.org/rss/1.0/modules/content/" xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns:media="http://search.yahoo.com/mrss/" xmlns:pugpig="http://schema.pugpig.com/rss/" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:taxo="http://purl.org/rss/1.0/modules/taxonomy/" xmlns:php="http://www.w3.org/1999/XSL/Transform" version="2.0">
<channel>
<title><?php bloginfo_rss(\'name\'); ?> - Vol <?php echo $volume; ?> Issue <?php echo $issue; ?></title>
<?php echo("<link>"); self_link(); echo("</link>\\n"); ?>
<description>RSS feed for Volume <?php echo $volume; ?> Issue <?php echo $issue; ?></description>
<?php while(have_posts()) : the_post(); ?>
<?php
$page = get_post_meta( $post->ID, \'page\', true );
$authors = get_post_meta( $post->ID, \'authors\', true )
?>
<item>
<title><?php the_title_rss(); ?></title>
<author><?php the_author(); ?></author>
<?php
if ( ! empty ( $authors )) {
ns_print_authors( $post->ID, $authors );
}
?>
<?php
if (get_post_meta($post->ID,"standfirst_use_strap",true)){
?>
<?php echo("<pugpig:summary><p class=\\"strap\\">");echo strip_tags(the_excerpt_rss()); echo("</p></pugpig:summary>\\n");
} else {
echo("<pugpig:summary><p class=\\"strap\\">");
echo get_post_meta($post->ID,"standfirst",true);
echo ("</p></pugpig:summary>\\n");
}
?>
<?php echo("<pugpig:subtitle>"); ns_print_taxonomy( $post->ID, \'article_type\');
echo ("</pugpig:subtitle>\\n");
echo("<green:issue>"); echo $issue; echo("</green:issue>\\n");
echo("<pugpig:page>"); echo $page; echo("</pugpig:page>\\n");
$article_section = wp_get_object_terms($post->ID,\'article_section\');
$article_types = wp_get_object_terms($post->ID, \'article_subject\');
$istech = false;
$isnews = false;
foreach($article_section as $section){
if ($section->name == \'News\'){ $isnews = true;}
}
foreach($article_types as $subject){
if ($subject->name ==\'Technology\'){ $istech = true; }
}
if ($istech && $isnews ){
?><category>Technology</category><?php
} else {
?>
<category><?php ns_print_taxonomy( $post->ID, \'article_section\'); ?></category>
<?php
}
?>
<?php echo("<pugpig:thumbnail>");
echo get_post_meta($post->ID, \'_wp_article_thumbnail\', true);
echo("</pugpig:thumbnail>\\n");
echo("<pugpig:topics>"); ns_print_taxonomy( $post->ID, \'article_topic\'); echo("</pugpig:topics>\\n");
echo("<pugpig:channels>"); ns_print_taxonomy( $post->ID, \'article_subject\'); echo("</pugpig:channels>\\n");
?>
<link><?php the_permalink_rss(); ?></link>
<pubDate><?php ns_print_pubdate( $post->ID ); ?></pubDate>
<guid isPermaLink="false"><?php ns_print_guid (get_the_guid()) ?></guid>
<description>
<?php
if (!get_post_meta($post->ID,"standfirst_use_strap",true)){
echo \'<p class="infuse">\'.strip_tags(get_the_excerpt()).\'</p>\';
} else {
if (get_post_meta("standfirst",true));
echo \'<p class="note">\'.get_post_meta($post->ID,"standfirst",true).\'</p>\';
}
?>
<?php ns_print_description(get_the_content_feed(\'rss2\'));
?></description>
<?php rss_enclosure(); ?>
<?php do_action(\'rss2_item\'); ?>
</item>
<?php endwhile; ?>
</channel>
</rss>
<?php
/*
* Print pubdate.
* it will be embargo_date if set. Otherwise, it will be post date.
*/
function ns_print_pubdate( $post_id ) {
//mysql2date(\'F d Y \', get_post_time(\'Y-m-d H:i:s\', true), false);
$embargo_date = get_post_meta($post_id, \'embargo_date\', true);
$creation_date = get_post_time(\'Y-m-d H:i:s\', $post_id);
$publication_date = empty($embargo_date) ? $creation_date : $embargo_date;
echo mysql2date(\'F d Y \', $publication_date, false);
}
/*
* Print description.
* Process the body to adapt it to pugpig content.
* Decode html characters
*/
function ns_print_description ( $content ) {
//Instead of get_teh_content(), use get_the_content_feed(\'rss2\') and fix empty tags
$content = str_replace("–","-",$content);
$content = str_replace(" "," ",$content);
$content = str_replace("…","...",$content);
$content = str_replace(":",":",$content);
$content = preg_replace("#<script.*?>.*?</script>#","",$content); // remove javascript from description
$final_content = str_replace(\'<p>\', \'<p class="infuse">\', $content);
$final_content = str_replace(\'<div class=\\\'box-out\\\'>\', \'<div class=\\\'artbx bxbg\\\'>\', $final_content);
$final_content = str_replace(\'<p class=\\\'credit\\\'>\', \'<p class=\\\'copyright\\\'>\', $final_content);
$final_content = preg_replace(\'#\\[/?caption.*?\\]#\',"",$final_content);
$callback3 = function($matches){
$imgdata = $matches[3];
$matches1 = array();
preg_match(\'#src="(.*?)"#\',$imgdata,$matches1);
$src = $matches1[1];
$matches1 = array();
preg_match(\'#title="(.*?)"#\',$imgdata,$matches1);
$title = $matches1[1];
$matches1 = array();
preg_match(\'#class="(.*?)"#\',$imgdata,$matches1);
$class = $matches1[1];
$matches1 = array();
preg_match(\'#alt="(.*?)"#\',$imgdata,$matches1);
$alt = $matches1[1];
$matches1 = array();
preg_match(\'#wp-image-(\\d+)#\',$class,$matches1);
$imgnumber = $matches1[1];
$credit ="";
if ($matches[2]){ $title = $matches[2]; }
if ($matches[4]){
$matches1 = array();
preg_match(\'/<figcaption>(.*?)<\\/figcaption>/\',$matches[4],$matches1);
$caption = $matches1[1];
}
if ($matches[5]){
$matches1 = array();
preg_match(\'/<p\\sclass="copyright">(.*?)</p>\',$matches[5],$matches1);
$credit = $matches1[1];
}
if ($imgnumber && !$credit){
$credit = get_post_meta($imgnumber,\'credit\',true);
}
if (preg_match(\'/graphic/\',$class)){
return "<figure class=\\"infographic article-img-left\\"><img src=\\"$src\\"/><figcaption>$caption</figcaption>";
}
return "<figure><img class=\\"$class\\" src=\\"$src\\"/><figcaption>$caption</figcaption><p class=\\"copyright\\">$credit</p></figure>";
};
$callback2 = function($matches){
$imgdata = $matches[2];
$matches1 = array();
preg_match(\'#src="(.*?)"#\',$imgdata,$matches1);
$src = $matches1[1];
$matches1 = array();
preg_match(\'#title="(.*?)"#\',$imgdata,$matches1);
$title = $matches1[1];
$matches1 = array();
preg_match(\'#class="(.*?)"#\',$imgdata,$matches1);
$class = $matches1[1];
$matches1 = array();
preg_match(\'#alt="(.*?)"#\',$imgdata,$matches1);
$alt = $matches1[1];
$matches1 = array();
preg_match(\'#wp-image-(\\d+)#\',$class,$matches1);
$imgnumber = $matches1[1];
$credit ="";
if ($matches[2]){ $title = $matches[2]; }
if ($matches[3]){ $credit = $matches[3]; }
$caption = $matches[3];
$credit = $matches[4];
if (preg_match(\'/graphic/\',$class)){
return "<figure class=\\"infographic article-img-left\\"><img src=\\"$src\\"><figcaption>$caption</figcaption>";
}
return "<figure><img class=\\"$class\\" src=\\"$src\\"><figcaption>$caption</figcaption><p class=\\"copyright\\">$credit</p></figure>";
};
$final_content = preg_replace_callback("#<figure(.*?)><img(.*?)\\"/><div class=\\"image-details\\"><figcaption>(.*?)</figcaption><p class=\'credit\'>(.*?)</p></div></figure>#",$callback3,$final_content);
$callback1 = function($matches){
$imgdata = $matches[1];
$matches1 = array();
preg_match(\'#src="(.*?)"#\',$imgdata,$matches1);
$src = $matches1[1];
$matches1 = array();
preg_match(\'#title="(.*?)"#\',$imgdata,$matches1);
$title = $matches1[1];
$matches1 = array();
preg_match(\'#class="(.*?)"#\',$imgdata,$matches1);
$class = $matches1[1];
$matches1 = array();
preg_match(\'#alt="(.*?)"#\',$imgdata,$matches1);
$alt = $matches1[1];
$matches1 = array();
preg_match(\'#wp-image-(\\d+)#\',$class,$matches1);
$imgnumber = $matches1[1];
$credit ="";
if ($matches[2]){ $title = $matches[2]; }
if ($matches[3]){ $credit = $matches[3]; }
if ($imgnumber && !$credit){
$credit = get_post_meta($imgnumber,\'credit\',true);
}
if (!preg_match(\'/graphic/\',$class)){
return "<figure><img class=\\"$class\\" src=\\"$src\\" alt=\\"$alt\\" title=\\"$title\\"><figcaption>$title</figcaption><p class=\\"copyright\\">$credit</p></figure>";
}
return "<figure class=\\"infographic\\ article-img-left\\"><img src=\\"$src\\" alt=\\"$alt\\" title=\\"$title\\"><figcaption>$title</figcaption><p class=\\"copyright\\">$credit</p></figure>";
};
$final_content = preg_replace_callback(\'#<img(.*?)>([^<]+)<i>([^<]+)</i>#\',$callback1,$final_content);
$final_content = preg_replace_callback("#<figure(.*?)\\"><h3>(.*?)</h3><img(.*?)><div\\sclass=\\"images-detail\\">(<figcaption>.*?<figcaption>)?(<p\\sclass=\\"image-descrption\\">.*?</p>)(<p\\sclass=\\"copyright\\">.*?</p>)<div></figure>#",$callback3,$final_content);
$callback = function($matches){
$imgdata = $matches[1];
$matches1 = array();
preg_match(\'#src="(.*?)"#\',$imgdata,$matches1);
$src = $matches1[1];
$matches1 = array();
preg_match(\'#title="(.*?)"#\',$imgdata,$matches1);
$title = $matches1[1];
$matches1 = array();
preg_match(\'#class="(.*?)"#\',$imgdata,$matches1);
$class = $matches1[1];
$matches1 = array();
preg_match(\'#alt="(.*?)"#\',$imgdata,$matches1);
$alt = $matches1[1];
$matches1 = array();
preg_match(\'#wp-image-(\\d+)#\',$class,$matches1);
$imgnumber = $matches1[1];
$credit ="";
if ($matches[2]){ $title = $matches[2]; }
if ($matches[3]){ $credit = $matches[3]; }
if ($imgnumber && !$credit){
$credit = get_post_meta($imgnumber,\'credit\',true);
}
return "<figure><img class=\\"$class\\" src=\\"$src\\" alt=\\"$alt\\" title=\\"$title\\"><figcaption>$title<p class=\\"copyright\\">$credit</p></figcaption></figure>";
};
$final_content = preg_replace_callback(\'#(?<!<figure).*?<img(.*?)>([^<]+)<i>([^<]+)</i></p>#\',$callback,$final_content);
# $final_content = preg_replace_callback(\'#(?<!<figure).*?<img(.*?)>#\',$callback,$final_content);
$final_content = preg_replace(\'#&([^;]{1,8})#\',\'&$1\',$final_content);
$final_content = preg_replace(\'/</\',\'<\',$final_content);
$final_content = preg_replace(\'/>/\',\'>\',$final_content);
$final_content = ns_decode_characters( $final_content );
$final_content = preg_replace(\'/<figure class="article-img-inline">/\',\'<figure>\',$final_content);
$final_content = preg_replace(\'/<figure class="article-img-right">/\',\'<figure>\',$final_content);
$final_content = preg_replace(\'#<img(.*?)>#\',\'<img$2>\',$final_content);
echo $final_content;
}
// Print authors
function ns_print_authors( $post_id, $authors ){
for ($i = 0; $i < $authors; $i++) {
$author_name = get_post_meta($post_id, \'authors_\'.$i.\'_name\', true);
$author_affiliation = get_post_meta($post_id, \'authors_\'.$i.\'_affiliation\', true);
$author_affiliation = ns_decode_characters( $author_affiliation);
$author_location = get_post_meta($post_id, \'authors_\'.$i.\'_location\', true);
$author_location = ns_decode_characters( $author_location);
echo \'<pugpig:author>\';
echo \'<pugpig:aname>\'.$author_name.\'</pugpig:aname>\';
echo \'<pugpig:alocation>\'.$author_location.\'</pugpig:alocation>\';
echo \'<pugpig:affiliation>\'.$author_affiliation.\'</pugpig:affiliation>\';
echo \'</pugpig:author>\';
}
}
// Print taxonomy
function ns_print_taxonomy ( $post_id, $taxonomy ) {
$article_types = wp_get_object_terms($post_id, $taxonomy);
$output = \'\';
if(!empty($article_types) && !is_wp_error( $article_types )){
$count = 0;
foreach($article_types as $type){
if ($count == 0) {
$output = $type->name;
} else {
$output = $output.\', \'.$type->name;
}
$count++;
}
}
echo $output;
}
// Print guid
function ns_print_guid ( $guid) {
$dir = substr(strrchr($guid, "/"), 1);
echo $dir;
