Source for file _functions_trackback.php

Documentation is available at _functions_trackback.php

<?php
/**
* Trackback functions
*
* b2evolution - {@link http://b2evolution.net/}
* Released under GNU GPL License - {@link http://b2evolution.net/about/license.html}
*
* @package evocore
* @author This file built upon code from original b2 - http://cafelog.com/
*/
if( !defined('DB_USER') ) die( 'Please, do not access this page directly.' );
/**
* trackbacks(-)
*
* Do multiple trackbacks
*
* fplanque: added
*/
function trackbacks( $post_trackbacks, $content, $post_title, $post_ID )
{
echo "<div class=\"panelinfo\">\n";
echo "<h3>", T_('Sending trackbacks...'), "</h3>\n";
if(empty($post_trackbacks))
{
echo "<p>", T_('No trackback to be sent.'), "</p>\n";
}
else
{
$excerpt = (strlen(strip_tags($content)) > 255) ? substr(strip_tags($content), 0, 252).'...' : strip_tags($content);
echo "<p>", T_('Excerpt to be sent:'), " $excerpt</p>\n";
$trackback_urls = split('( )+', $post_trackbacks,10); // fplanque: ;
foreach($trackback_urls as $tb_url)
{ // trackback each url:
$tb_url = trim($tb_url);
if( empty( $tb_url ) ) continue;
trackback($tb_url, $post_title, $excerpt, $post_ID);
}
echo "<p>", T_('Trackbacks done.'), "</p>\n";
}
echo "</div>\n";
}
/*
* trackback(-)
*
* sending Trackback to single URL:
* TODO: add autodiscovery
*/
function trackback(
$trackback_url,
$title,
$excerpt,
$ID) // post ID
{
global $ItemCache;
echo "<p>", T_('Sending trackback to:'), " $trackback_url ...\n";
$title = urlencode($title);
$excerpt = urlencode($excerpt);
$blog_name = urlencode(get_bloginfo('name'));
$Item = $ItemCache->get_by_ID( $ID );
$url = rawurlencode( $Item->gen_permalink('', '', false, '&') );
// dis is the trackback stuff to be sent:
$query_string = "title=$title&url=$url&blog_name=$blog_name&excerpt=$excerpt";
// echo "url:$trackback_url<br>$sending:$query_string<br />";
if (strstr($trackback_url, '?'))
{
echo '[get]';
$trackback_url .= "&".$query_string;;
flush();
$fp = fopen($trackback_url, 'r');
$result = fread($fp, 4096);
fclose($fp);
/* debug code
$debug_file = 'trackback.log';
$fp = fopen($debug_file, 'a');
fwrite($fp, "\n*****\nTrackback URL query:\n\n$trackback_url\n\nResponse:\n\n");
fwrite($fp, $result);
fwrite($fp, "\n\n");
fclose($fp);
*/
}
else
{
echo '[post]';
$trackback_url = parse_url($trackback_url);
$port = isset($trackback_url['port']) ? $trackback_url['port'] : 80;
$http_request = 'POST '.$trackback_url['path']." HTTP/1.0\r\n";
$http_request .= 'Host: '.$trackback_url['host']."\r\n";
$http_request .= 'Content-Type: application/x-www-form-urlencoded'."\r\n";
$http_request .= 'Content-Length: '.strlen($query_string)."\r\n";
$http_request .= "\r\n";
$http_request .= $query_string;
flush();
$fs = fsockopen($trackback_url['host'], $port);
fputs($fs, $http_request);
$result = '';
while(!feof($fs)) {
$result .= fgets($fs, 4096);
}
/* debug code
$debug_file = 'trackback.log';
$fp = fopen($debug_file, 'a');
fwrite($fp, "\n*****\nRequest:\n\n$http_request\n\nResponse:\n\n$result");
while(!@feof($fs)) {
fwrite($fp, @fgets($fs, 4096));
}
fwrite($fp, "\n\n");
fclose($fp);
*/
fclose($fs);
}
echo "<br \>", T_('Response:'), " $result</p>\n";
return $result;
}
function trackback_response($error = 0, $error_message = '')
{ // trackback - reply
echo '<?xml version="1.0" encoding="iso-8859-1"?'.">\n";
echo "<response>\n";
echo "<error>$error</error>\n";
echo "<message>$error_message</message>\n";
echo "</response>";
die();
}
/*
* TEMPLATE FUNCTIONS:
*/
/*****
* Trackback tags
*****/
/**
*
* @deprecated deprecated by {@link Item::trackback_url()}
*/
function trackback_url($display = 1)
{
global $htsrv_url, $id;
global $Settings;
if( $Settings->get('links_extrapath') )
{
$tb_url = "$htsrv_url/trackback.php/$id";
}
else
{
$tb_url = "$htsrv_url/trackback.php?tb_id=$id";
}
if ($display) {
echo $tb_url;
} else {
return $tb_url;
}
}
/**
* trackback_number(-)
* @deprecated deprecated by {@link Item::feedback_link()}
*/
function trackback_number( $zero='#', $one='#', $more='#' )
{
if( $zero == '#' ) $zero = T_('Trackback (0)');
if( $one == '#' ) $one = T_('Trackback (1)');
if( $more == '#' ) $more = T_('Trackbacks (%d)');
global $id, $tablecomments, $tb, $querycount, $cache_trackbacknumber, $use_cache;
$number = generic_ctp_number($id, 'trackbacks');
if ($number == 0) {
$blah = $zero;
} elseif ($number == 1) {
$blah = $one;
} elseif ($number > 1) {
$n = $number;
$more = str_replace('%d', $n, $more);
$blah = $more;
}
echo $blah;
}
/**
* Displays link to the trackback page
* @deprecated deprecated by {@link Item::feedback_link()}
*/
function trackback_link($file='',$c=0,$pb=0)
{
global $id;
if( ($file == '') || ($file == '/') )
$file = get_bloginfo('blogurl');
echo url_add_param( $file, 'p='.$id );
if( $c == 1 )
{ // include comments
echo '&c=1';
}
echo '&tb=1';
if( $pb == 1 )
{ // include pingback
echo '&pb=1';
}
echo '#trackbacks';
}
/**
*
* @deprecated deprecated by {@link Item::feedback_link()}
*/
function trackback_popup_link($zero='#', $one='#', $more='#', $CSSclass='')
{
global $blog, $id, $b2trackbackpopupfile, $b2commentsjavascript;
echo '<a href="';
if ($b2commentsjavascript) {
echo url_add_param( get_bloginfo('blogurl'), 'template=popup&p='.$id.'&tb=1' );
echo '" onclick="b2open(this.href); return false"';
} else {
// if comments_popup_script() is not in the template, display simple comment link
trackback_link();
echo '"';
}
if (!empty($CSSclass)) {
echo ' class="'.$CSSclass.'"';
}
echo '>';
trackback_number($zero, $one, $more);
echo '</a>';
}
/**
* This adds trackback autodiscovery information
*
* @deprecated deprecated by {@link Item::trackback_rdf()}
*/
function trackback_rdf($timezone=0)
{
global $id, $blogfilename; // fplanque added: $blogfilename
// if (!stristr($_SERVER['HTTP_USER_AGENT'], 'W3C_Validator')) {
// fplanque WARNING: this isn't a very clean way to validate :/
// fplanque added: html comments (not perfect but better way of validating!)
echo "<!--\n";
echo '<rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" '."\n";
echo ' xmlns:dc="http://purl.org/dc/elements/1.1/"'."\n";
echo ' xmlns:trackback="http://madskills.com/public/xml/rss/module/trackback/">'."\n";
echo '<rdf:Description'."\n";
echo ' rdf:about="';
permalink_single();
echo '"'."\n";
echo ' dc:identifier="';
permalink_single();
echo '"'."\n";
echo ' dc:title="'.format_to_output(get_the_title(),'xmlattr').'"'."\n";
echo ' trackback:ping="'.trackback_url(0).'" />'."\n";
echo '</rdf:RDF>';
echo "-->\n";
// }
}
/*****
* /Trackback tags
*****/
?>

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Source for file _functions_trackback.php

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