Warning: Cannot modify header information - headers already sent by (output started at /var/www/html/header.php:4) in /var/www/html/index.php on line 9

Warning: include(pages/sitemap.xml.php): failed to open stream: No such file or directory in /var/www/html/index.php on line 12

Warning: include(): Failed opening 'pages/sitemap.xml.php' for inclusion (include_path='.:/usr/local/lib/php') in /var/www/html/index.php on line 12