note 84912 added to function.header

I have designed a php image gallery which works perfectly well 95% of the time but every now and again a page will just display in code and these headers will show before the html: HTTP/1.1 200 OK Date: Tue, 05 Aug 2008 20:15:24 GMT Server: Apache/2 X-Powered-By: PHP/4.4.8 Expires: Thu, 19 Nov 1981 08:52:00 GMT Cache-Control: no-store, no-cache, must-revalidate, post-check=0, pre-check=0 Pragma: no-cache Keep-Alive: timeout=15, max=97 Connection: Keep-Alive Transfer-Encoding: chunked Content-Type: text/html 197 Does anyone know why this is or how it can be fixed? ---- Server IP: 92.48.100.16 Probable Submitter: 84.68.81.134 ---- Manual Page -- http://www.php.net/manual/en/function.header.php Edit -- https://master.php.net/note/edit/84912 Del: integrated -- https://master.php.net/note/delete/84912/integrated Del: useless -- https://master.php.net/note/delete/84912/useless Del: bad code -- https://master.php.net/note/delete/84912/bad+code Del: spam -- https://master.php.net/note/delete/84912/spam Del: non-english -- https://master.php.net/note/delete/84912/non-english Del: in docs -- https://master.php.net/note/delete/84912/in+docs Del: other reasons-- https://master.php.net/note/delete/84912 Reject -- https://master.php.net/note/reject/84912 Search -- https://master.php.net/manage/user-notes.php