header('HTTP/1.1 503 Service Temporarily Unavailable');
header('Retry-After: Thu, 19 Jan 2012 00:00:00 GMT');


<br />
<b>Warning</b>:  Cannot modify header information - headers already sent by (output started at /home/hazarus/public_html/index.php:3) in <b>/home/hazarus/public_html/wp-includes/pluggable.php</b> on line <b>866</b><br />