PHP: Creating dynamic sitemap - php

Question

I was searching for a simple script to generate a dynamic sitemap when i came across what i have below:
<?php
header("Content-Type: application/xml; charset=utf-8");
echo '<?xml version="1.0" encoding="UTF-8"?>'.PHP_EOL;
echo '<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">' .PHP_EOL;
function urlElement($url) {
echo '<url>'.PHP_EOL;
echo '<loc>'.$url.'</loc>'. PHP_EOL;
echo '<changefreq>weekly</changefreq>'.PHP_EOL;
echo '</url>'.PHP_EOL;
}
urlElement('https://www.example.com/sub1');
urlElement('https://www.example.com/sub2');
urlElement('https://www.example.com/sub2');
echo '</urlset>';
?>
The above code works perfectly to generate a sitemap for the specified urls but i need something that can loop through the specified urls and fetch all the links on them to create a single sitemap while ignoring duplicate links.

Answer 1

Store your URLs in an array then do a foreach() on the array and call urlElement($value); on the value within the loop.
<?php
function urlElement($url) {
echo '<url>'.PHP_EOL;
echo '<loc>'.$url.'</loc>'. PHP_EOL;
echo '<changefreq>weekly</changefreq>'.PHP_EOL;
echo '</url>'.PHP_EOL;
}
$urls = array(
"http://www.google.com",
"http://www.google.com/images",
"http://www.google.com/maps"
);
header("Content-Type: application/xml; charset=utf-8");
echo '<?xml version="1.0" encoding="UTF-8"?>'.PHP_EOL;
echo '<urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.sitemaps.org/schemas/sitemap/0.9 http://www.sitemaps.org/schemas/sitemap/0.9/sitemap.xsd">' .PHP_EOL;
foreach($urls as $value) {
urlElement($value);
}
echo '</urlset>';
?>