note 58904 added to features.http-auth

I'm try whit all exaple in this page. i'm report many problems like this: Warning: session_start(): Cannot send session cookie - headers already sent by (output started at /usr/local/psa/home/vhosts/agrariaponteggia.it/httpdocs/prova.php:8) in /usr/local/psa/home/vhosts/agrariaponteggia.it/httpdocs/prova.php on line 14 Warning: session_start(): Cannot send session cache limiter - headers already sent (output started at /usr/local/psa/home/vhosts/agrariaponteggia.it/httpdocs/prova.php:8) in /usr/local/psa/home/vhosts/agrariaponteggia.it/httpdocs/prova.php on line 14 Warning: Cannot modify header information - headers already sent by (output started at /usr/local/psa/home/vhosts/agrariaponteggia.it/httpdocs/prova.php:8) in /usr/local/psa/home/vhosts/agrariaponteggia.it/httpdocs/prova.php on line 15 Warning: Cannot modify header information - headers already sent by (output started at /usr/local/psa/home/vhosts/agrariaponteggia.it/httpdocs/prova.php:8) in /usr/local/psa/home/vhosts/agrariaponteggia.it/httpdocs/prova.php on line 74 Warning: Cannot modify header information - headers already sent by (output started at /usr/local/psa/home/vhosts/agrariaponteggia.it/httpdocs/prova.php:8) in /usr/local/psa/home/vhosts/agrariaponteggia.it/httpdocs/prova.php on line 75 You need to log in before you can access this page. can you help me? ---- Manual Page -- http://www.php.net/manual/en/features.http-auth.php Edit -- http://master.php.net/manage/user-notes.php?action=edit+58904 Delete: added to the manual -- http://master.php.net/manage/user-notes.php?action=delete+58904&report=yes&reason=added+to+the+manual Delete: bad code -- http://master.php.net/manage/user-notes.php?action=delete+58904&report=yes&reason=bad+code Delete: spam -- http://master.php.net/manage/user-notes.php?action=delete+58904&report=yes&reason=spam Delete: useless -- http://master.php.net/manage/user-notes.php?action=delete+58904&report=yes&reason=useless Delete: non-english -- http://master.php.net/manage/user-notes.php?action=delete+58904&report=yes&reason=non-english Delete: already in docs -- http://master.php.net/manage/user-notes.php?action=delete+58904&report=yes&reason=already+in+docs Delete: other reasons -- http://master.php.net/manage/user-notes.php?action=delete+58904&report=yes Reject -- http://master.php.net/manage/user-notes.php?action=reject+58904&report=yes Search -- http://master.php.net/manage/user-notes.php