note 28058 rejected from faq.databases by nicos

I have tried to use sessions based on Mysql ,and the test program is from the book<<professional php programming>> ,my operating system is redhat 7.2.I do exactly as what the book tells me and the following is the problem occured: (line 37:sesson_start();) /////////////////////// Warning: Cannot send session cookie - headers already sent by (output started at /var/www/html/test/test.php:4) in /var/www/html/test/test.php on line 37 Warning: Cannot send session cache limiter - headers already sent (output started at /var/www/html/test/test.php:4) in /var/www/html/test/test.php on line 37 Fatal error: Failed to initialize session module in /var/www/html/test/test.php on line 37 ///////////////////// I think my php maybe newer than that in the book ,can you tell me how to deal with it? Thank you very much!