我有这个用于生成动态xml站点地图的PHP类：
类：：
namespace SitemapPHP;
class Sitemap {
/**
*
* @var \XMLWriter
*/
private $writer;
private $domain;
private $path;
private $filename = 'sitemap';
private $current_item = 0;
private $current_sitemap = 0;
const EXT = '.xml';
const SCHEMA = 'http://www.sitemaps.org/schemas/sitemap/0.9';
const DEFAULT_PRIORITY = 0.5;
const ITEM_PER_SITEMAP = 50000;
const SEPERATOR = '-';
const INDEX_SUFFIX = 'index';
/**
*
* @param string $domain
*/
public function __construct($domain) {
$this->setDomain($domain);
}
/**
* Sets root path of the website, starting with http:// or https://
*
* @param string $domain
*/
public function setDomain($domain) {
$this->domain = $domain;
return $this;
}
/**
* Returns root path of the website
*
* @return string
*/
private function getDomain() {
return $this->domain;
}
/**
* Returns XMLWriter object instance
*
* @return \XMLWriter
*/
private function getWriter() {
return $this->writer;
}
/**
* Assigns XMLWriter object instance
*
* @param \XMLWriter $writer
*/
private function setWriter(\XMLWriter $writer) {
$this->writer = $writer;
}
/**
* Returns path of sitemaps
*
* @return string
*/
private function getPath() {
return $this->path;
}
/**
* Sets paths of sitemaps
*
* @param string $path
* @return Sitemap
*/
public function setPath($path) {
$this->path = $path;
return $this;
}
/**
* Returns filename of sitemap file
*
* @return string
*/
private function getFilename() {
return $this->filename;
}
/**
* Sets filename of sitemap file
*
* @param string $filename
* @return Sitemap
*/
public function setFilename($filename) {
$this->filename = $filename;
return $this;
}
/**
* Returns current item count
*
* @return int
*/
private function getCurrentItem() {
return $this->current_item;
}
/**
* Increases item counter
*
*/
private function incCurrentItem() {
$this->current_item = $this->current_item + 1;
}
/**
* Returns current sitemap file count
*
* @return int
*/
private function getCurrentSitemap() {
return $this->current_sitemap;
}
/**
* Increases sitemap file count
*
*/
private function incCurrentSitemap() {
$this->current_sitemap = $this->current_sitemap + 1;
}
/**
* Prepares sitemap XML document
*
*/
private function startSitemap() {
$this->setWriter(new \XMLWriter());
if ($this->getCurrentSitemap()) {
$this->getWriter()->openURI($this->getPath() . $this->getFilename() . self::SEPERATOR . $this->getCurrentSitemap() . self::EXT);
} else {
$this->getWriter()->openURI($this->getPath() . $this->getFilename() . self::EXT);
}
$this->getWriter()->startDocument('1.0', 'UTF-8');
$this->getWriter()->setIndent(true);
$this->getWriter()->startElement('urlset');
$this->getWriter()->writeAttribute('xmlns', self::SCHEMA);
}
/**
* Adds an item to sitemap
*
* @param string $loc URL of the page. This value must be less than 2,048 characters.
* @param string|null $priority The priority of this URL relative to other URLs on your site. Valid values range from 0.0 to 1.0.
* @param string|null $changefreq How frequently the page is likely to change. Valid values are always, hourly, daily, weekly, monthly, yearly and never.
* @param string|int|null $lastmod The date of last modification of url. Unix timestamp or any English textual datetime description.
* @return Sitemap
*/
public function addItem($loc, $priority = self::DEFAULT_PRIORITY, $changefreq = NULL, $lastmod = NULL) {
if (($this->getCurrentItem() % self::ITEM_PER_SITEMAP) == 0) {
if ($this->getWriter() instanceof \XMLWriter) {
$this->endSitemap();
}
$this->startSitemap();
$this->incCurrentSitemap();
}
$this->incCurrentItem();
$this->getWriter()->startElement('url');
$this->getWriter()->writeElement('loc', $this->getDomain() . $loc);
if($priority !== null)
$this->getWriter()->writeElement('priority', $priority);
if ($changefreq)
$this->getWriter()->writeElement('changefreq', $changefreq);
if ($lastmod)
$this->getWriter()->writeElement('lastmod', $this->getLastModifiedDate($lastmod));
$this->getWriter()->endElement();
return $this;
}
/**
* Prepares given date for sitemap
*
* @param string $date Unix timestamp or any English textual datetime description
* @return string Year-Month-Day formatted date.
*/
private function getLastModifiedDate($date) {
if (ctype_digit($date)) {
return date('Y-m-d', $date);
} else {
$date = strtotime($date);
return date('Y-m-d', $date);
}
}
/**
* Finalizes tags of sitemap XML document.
*
*/
private function endSitemap() {
if (!$this->getWriter()) {
$this->startSitemap();
}
$this->getWriter()->endElement();
$this->getWriter()->endDocument();
}
/**
* Writes Google sitemap index for generated sitemap files
*
* @param string $loc Accessible URL path of sitemaps
* @param string|int $lastmod The date of last modification of sitemap. Unix timestamp or any English textual datetime description.
*/
public function createSitemapIndex($loc, $lastmod = 'Today') {
$this->endSitemap();
$indexwriter = new \XMLWriter();
$indexwriter->openURI($this->getPath() . $this->getFilename() . self::SEPERATOR . self::INDEX_SUFFIX . self::EXT);
$indexwriter->startDocument('1.0', 'UTF-8');
$indexwriter->setIndent(true);
$indexwriter->startElement('sitemapindex');
$indexwriter->writeAttribute('xmlns', self::SCHEMA);
for ($index = 0; $index < $this->getCurrentSitemap(); $index++) {
$indexwriter->startElement('sitemap');
$indexwriter->writeElement('loc', $loc . $this->getFilename() . ($index ? self::SEPERATOR . $index : '') . self::EXT);
$indexwriter->writeElement('lastmod', $this->getLastModifiedDate($lastmod));
$indexwriter->endElement();
}
$indexwriter->endElement();
$indexwriter->endDocument();
}
}
我可以使用：$sitemap->addItem('/', '1.0', 'daily', 'Today');添加项目并使用以下命令添加sitemapindex：$sitemap->createSitemapIndex('http://example.com/sitemap/', 'Today');现在我需要为每个月的存档生成多个站点地图和动态的MySQL数据库：
$sql = "SELECT YEAR(FROM_UNIXTIME(timestamp)) AS YEAR,
MONTH(FROM_UNIXTIME(timestamp)) AS MONTH
FROM ".NEWS_ARTICLES." GROUP BY YEAR, MONTH ORDER BY YEAR DESC, MONTH ";
$newsdata = DataAccess::Fetch($sql);
$currentYear = null;
foreach($newsdata AS $news){
$sitemap->setFilename('posts-.'.$news['MONTH'].'-'.$news['YEAR'].'');
$sitemap->addItem('/post/' . $news['slug'], '0.6', 'weekly', $post['created_at']);
}
但在行动中，我看到一个文件和结果数据。如何为每个月生成一个xml文件并将数据/插入/插入此文件（例如：posts-6-2016.xml posts-7-2016.xml）？！
Sitemap类只允许一个$filename，这意味着你可以创建类的多个实例并设置文件：
foreach($newsdata AS $news){
$sitemap = new Sitemap('http://example.com/');
$sitemap->setFilename('posts-.'.$news['MONTH'].'-'.$news['YEAR'].'');
$sitemap->addItem('/post/' . $news['slug'], '0.6', 'weekly', $post['created_at']);
}
假设您正在使用的其他代码正确地创建了站点地图文件，则创建新实例应该正确创建多个文件。