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<?php
/**
* The dynamic Google Sitemap builder.
*
* http://[...]/sitemap.xml.php
* http://[...]/sitemap.xml.php?gz=1
* http://[...]/sitemap.xml
* http://[...]/sitemap.gz
* http://[...]/sitemap.xml.gz
*
* The Google Sitemap protocol is described here:
* http://www.google.com/webmasters/sitemaps/docs/en/protocol.html
*
* PHP Version 5.3
*
* This Source Code Form is subject to the terms of the Mozilla Public License,
* v. 2.0. If a copy of the MPL was not distributed with this file, You can
* obtain one at http://mozilla.org/MPL/2.0/.
*
* @category phpMyFAQ
* @package SEO
* @author Matteo Scaramuccia <matteo@phpmyfaq.de>
* @copyright 2006-2012 phpMyFAQ Team
* @license http://www.mozilla.org/MPL/2.0/ Mozilla Public License Version 2.0
* @link http://www.phpmyfaq.de
* @since 2006-06-26
*/
define('PMF_SITEMAP_GOOGLE_CHANGEFREQ_ALWAYS', 'always');
define('PMF_SITEMAP_GOOGLE_CHANGEFREQ_HOURLY', 'hourly');
define('PMF_SITEMAP_GOOGLE_CHANGEFREQ_DAILY', 'daily');
define('PMF_SITEMAP_GOOGLE_CHANGEFREQ_WEEKLY', 'weekly');
define('PMF_SITEMAP_GOOGLE_CHANGEFREQ_MONTHLY', 'monthly');
define('PMF_SITEMAP_GOOGLE_CHANGEFREQ_YEARLY', 'yearly');
define('PMF_SITEMAP_GOOGLE_CHANGEFREQ_NEVER', 'never');
define('PMF_SITEMAP_GOOGLE_MAX_URL_LENGTH', 2048);
define('PMF_SITEMAP_GOOGLE_MAX_URLS', 50000);
define('PMF_SITEMAP_GOOGLE_MAX_FILE_LENGTH', 10485760); // 10MB
define('PMF_SITEMAP_GOOGLE_PRIORITY_MIN', '0.0');
define('PMF_SITEMAP_GOOGLE_PRIORITY_MAX', '1.0');
define('PMF_SITEMAP_GOOGLE_PRIORITY_DEFAULT', '0.5');
define('PMF_SITEMAP_GOOGLE_GET_GZIP', 'gz');
define('PMF_SITEMAP_GOOGLE_GET_INDEX', 'idx');
define('PMF_SITEMAP_GOOGLE_FILENAME', 'sitemap.xml');
define('PMF_SITEMAP_GOOGLE_FILENAME_GZ', 'sitemap.xml.gz');
define('PMF_SITEMAP_GOOGLE_INDEX_FILENAME', 'sitemap_index.xml');
define('PMF_ROOT_DIR', __DIR__);
define('IS_VALID_PHPMYFAQ', null);
require PMF_ROOT_DIR .'/inc/Bootstrap.php';
//
// Initalizing static string wrapper
//
PMF_String::init('en');
// {{{ Functions
function buildSitemapNode($location, $lastmod = null, $changeFreq = null, $priority = null)
{
if (!isset($lastmod)) {
$lastmod = PMF_Date::createIsoDate($_SERVER['REQUEST_TIME'], DATE_W3C, false);
}
if (!isset($changeFreq)) {
$changeFreq = PMF_SITEMAP_GOOGLE_CHANGEFREQ_DAILY;
}
$node =
'<url>'
.'<loc>'.PMF_String::htmlspecialchars($location).'</loc>'
.'<lastmod>'.$lastmod.'</lastmod>'
.'<changefreq>'.$changeFreq.'</changefreq>'
.(isset($priority) ? '<priority>'.$priority.'</priority>' : '')
.'</url>';
return $node;
}
//
// Future improvements
// WHEN a User PMF Sitemap will be:
// a. bigger than 10MB (!)
// b. w/ more than 50K URLs (!)
// we'll manage this issue using a Sitemap Index Files produced by this PHP code
// including Sitemap URLs always produced by this same PHP code (see PMF_SITEMAP_GOOGLE_GET_INDEX)
//
PMF_Init::cleanRequest();
session_name(PMF_Session::PMF_COOKIE_NAME_AUTH);
session_start();
$oFaq = new PMF_Faq($faqConfig);
// Load the faq
$items = $oFaq->getTopTenData(PMF_SITEMAP_GOOGLE_MAX_URLS - 1);
$visitsMax = 0;
$visitMin = 0;
if (count($items) > 0) {
$visitsMax = $items[0]['visits'];
$visitMin = $items[count($items)-1]['visits'];
}
// Sitemap header
$sitemap =
'<?xml version="1.0" encoding="UTF-8"?>'
.'<urlset xmlns="http://www.google.com/schemas/sitemap/0.84"'
.' xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"'
.' xsi:schemaLocation="http://www.google.com/schemas/sitemap/0.84'
.' http://www.google.com/schemas/sitemap/0.84/sitemap.xsd">';
// 1st entry: the faq server itself
$sitemap .= buildSitemapNode(
$faqConfig->get('main.referenceURL'),
PMF_Date::createIsoDate($_SERVER['REQUEST_TIME'], DATE_W3C, false),
PMF_SITEMAP_GOOGLE_CHANGEFREQ_DAILY,
PMF_SITEMAP_GOOGLE_PRIORITY_MAX
);
// nth entry: each faq
foreach ($items as $item) {
$priority = PMF_SITEMAP_GOOGLE_PRIORITY_DEFAULT;
if (($visitsMax - $visitMin) > 0) {
$priority = sprintf('%.1f', PMF_SITEMAP_GOOGLE_PRIORITY_DEFAULT * (1 + (($item['visits'] - $visitMin)/($visitsMax - $visitMin))));
}
// a. We use plain PMF urls w/o any SEO schema
$link = str_replace($_SERVER['SCRIPT_NAME'], '/index.php', $item['url']);
// b. We use SEO PMF urls
if (PMF_SITEMAP_GOOGLE_USE_SEO) {
if (isset($item['thema'])) {
$oL = new PMF_Link($link, $faqConfig);
$oL->itemTitle = $item['thema'];
$link = $oL->toString();
}
}
$sitemap .= buildSitemapNode(
$faqConfig->get('main.referenceURL').$link,
PMF_Date::createIsoDate($item['date'], DATE_W3C),
// @todo: manage changefreq node with the info provided by faqchanges,
// if this will not add a big load to the server (+1 query/faq)
PMF_SITEMAP_GOOGLE_CHANGEFREQ_DAILY,
$priority
);
}
$sitemap .= '</urlset>';
$getgezip = PMF_Filter::filterInput(INPUT_GET, PMF_SITEMAP_GOOGLE_GET_GZIP, FILTER_VALIDATE_INT);
if (!is_null($getgezip) && (1 == $getgezip)) {
if (function_exists('gzencode')) {
$sitemapGz = gzencode($sitemap);
header('Content-Type: application/x-gzip');
header('Content-Disposition: attachment; filename="'.PMF_SITEMAP_GOOGLE_FILENAME_GZ.'"');
header('Content-Length: '.strlen($sitemapGz));
print $sitemapGz;
} else {
$http = new PMF_Helper_Http();
$http->sendStatus(404);
}
} else {
header('Content-Type: text/xml');
header('Content-Disposition: inline; filename="'.PMF_SITEMAP_GOOGLE_FILENAME.'"');
header('Content-Length: '.PMF_String::strlen($sitemap));
print $sitemap;
}
$faqConfig->getDb()->close();
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