sitemap xml生成方法
<?php
/**
* SitemapService.php.
*
* 生成sitemap
*/
class Sitemap
{
public $newLine = "\n";
public $indent = " ";
public $xmlHeader = "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n";
public $urlsetOpen = "<urlset xmlns=\"http://www.sitemaps.org/schemas/sitemap/0.9\"
xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\"
xsi:schemaLocation=\"http://www.sitemaps.org/schemas/sitemap/0.9
http://www.sitemaps.org/schemas/sitemap/0.9/sitemap.xsd\">\n";
public $urlsetValue = "";
public $urlsetClose = "</urlset>\n";
public $rootUrl = "";
public function __construct($rootUrl = "https://www.xxx")
{
if (empty($rootUrl)) {
$rootUrl = "https://www.xxx";
}
$this->rootUrl = $rootUrl;
}
private function makeUrlString ($urlString) {
return htmlentities($urlString, ENT_QUOTES|ENT_XML1, 'UTF-8');
}
/**
* 返回格式: 2019-02-01T12:40:05+00:00
* 参数格式: 2019-02-01 12:40:05
* @param $dateTime
* @return bool|string
*/
private function makeIso8601TimeStamp ($dateTime) {
if (!$dateTime) {
$dateTime = date('Y-m-d H:i:s');
}
if (is_numeric(substr($dateTime, 11, 1))) {
$isoTS = substr($dateTime, 0, 10) ."T"
.substr($dateTime, 11, 8) ."+00:00";
} else {
$isoTS = substr($dateTime, 0, 10);
}
return $isoTS;
}
private function makeUrlTag ($url, $modifiedDateTime, $changeFrequency, $priority) {
$newLine = $this->newLine;
$indent = $this->indent;
$urlOpen = "$indent<url>$newLine";
$urlClose = "$indent</url>$newLine";
$locOpen = "$indent$indent<loc>";
$locClose = "</loc>$newLine";
$lastmodOpen = "$indent$indent<lastmod>";
$lastmodClose = "</lastmod>$newLine";
$changefreqOpen = "$indent$indent<changefreq>";
$changefreqClose = "</changefreq>$newLine";
$priorityOpen = "$indent$indent<priority>";
$priorityClose = "</priority>$newLine";
$urlTag = $urlOpen;
$urlValue = $locOpen .$this->makeUrlString($url) .$locClose;
if ($modifiedDateTime) {
$urlValue .= $lastmodOpen .$this->makeIso8601TimeStamp($modifiedDateTime) .$lastmodClose;
}
if ($changeFrequency) {
$urlValue .= $changefreqOpen .$changeFrequency .$changefreqClose;
}
if ($priority) {
$urlValue .= $priorityOpen .$priority .$priorityClose;
}
$urlTag .= $urlValue;
$urlTag .= $urlClose;
return $urlTag;
}
/**
* 验证是否符合url格式
* url format: /xxx|lastmod|changefreq|priority
*
* @param $pageLine
* @return bool
*/
private function validateEntry ($pageLine) {
$page = explode("|", $pageLine);
$url = trim($page[0]);
$processLine = TRUE;
if (substr($url, 0, 1) != "/") {
$processLine = FALSE;
}
return $processLine;
}
/**
* 获取待生成的链接
* url format: /xxx|lastmod|changefreq|priority
*
* @return array
*/
private function getUrls()
{
$lastmod = date('Y-m-d H:i:s');
$changefreq = "daily";
$priority_index = "1.0";
$priority_category = "0.8";
$priority_details = "0.5";
$pageList = [];
$pageList[] = "/|$lastmod|$changefreq|$priority_index";
// 添加自己的网站url
$pageList[] = "/ranking|$lastmod|$changefreq|$priority_category";
return $pageList;
}
/**
* 生成sitemap文件
*/
public function generate()
{
$pageList = $this->getUrls();
foreach($pageList as $pageLine) {
$processLine = $this->validateEntry ($pageLine);
$page = explode("|", $pageLine);
$url = trim($page[0]);
if ($processLine) {
$this->urlsetValue .= $this->makeUrlTag ($this->rootUrl .$url, trim($page[1]), trim($page[2]), trim($page[3]));
}
}
return $this->xmlHeader . $this->urlsetOpen . $this->urlsetValue . $this->urlsetClose;
}
}
/**
* 1. Sitemap 构造方法，默认的rootUrl 修改为待整理的网站域名
* 2. Sitemap getUrls方法，添加自己网站的url
* 3. 调用Sitemap时，rootUrl的参数修改
*/
$rootUrl = "";
$sitemap = new Sitemap($rootUrl);
$xml_data = $sitemap->generate();
header('Content-type: application/xml; charset="utf-8"');
echo $xml_data;
参考链接
谷歌帮助文档
sitemap xml格式
谷歌seo优化