warning:Cannot modify header information

Warning: Cannot modify header information - headers already sent by (output started at /home/content/f/u/n/function/html/Connections/connBlueSky.php:12) in /home/content/f/u/n/function/html/order_history.php on line 45 (raWVWq   
=R*&+`9!  
but, in "connBlueSky.php", there is only 10 lines visible. 9u#{{H,D  
of course this can be fixed by put cursor over line 10, then press delete for a few times. /M�!"4`|  
but what about there are 1000 files? you have to do it one by one??? that's crazy.... .u_VdX7VU  
OyQ~m[G6['  
However, here I wanna tell you another solution!! t~ `kT  
-open php.ini file l6;'i/  
-Find output_buffering >x J<pSlG  
-set output_buffering = On o>a 5HUBa.  
-Replace output_buffering = Off GKv"YpL8U  
'.3W(z a  
then, it works, no more warning any more!!!