Yoast sitemap preloader

wp-sitemap-preloader.php

 <?php
 ignore_user_abort( true );
define( 'WP_USE_THEMES', false );
define( 'DONOTCACHEPAGE', true );

require( dirname( __FILE__ ) . '/wp-blog-header.php' );
 
ini_set('memory_limit','6G');
 
$sitemapIndex = home_url('sitemap_index.xml');

$sitemapIndex = json_decode(json_encode(simplexml_load_file($sitemapIndex) ), TRUE);

foreach($sitemapIndex['sitemap'] as $sitemapFile){

 
 
    @$body = file_get_contents($sitemapFile['loc'], false, stream_context_create([
        'http' => [
            'timeout' => 60, 
            'header' => [
                'User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/92.0.4515.159 Safari/537.36',
                'Upgrade-Insecure-Requests: 1',
                'Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.9',
                'Accept-Language: es_ES'
            ],
            'request_fulluri' => true,
        ],
    ]));

    if($body){
        echo $sitemapFile['loc']." Ok ! \n";
    }
    sleep(5); // 5s
}