Retrieve the modified date and populate de sitemap about php-sitemap-generator

[oblab]

I found a solution with php command get_meta_tags :

foreach ($pages as $page) {		
		 $tags = get_meta_tags($page);	
		 $tag = $tags['date'];  //We get the "meta name "date" content
$xml .= "<url><loc>" . $page . "</loc>
            <lastmod>" . $tag . "</lastmod> //We add the date content
            <changefreq>" . $this->config['CHANGE_FREQUENCY'] . "</changefreq>
            <priority>" . $this->config['PRIORITY'] . "</priority></url>";
		}