note 73973 added to faq.installation

I use windows IIS server her i get some Notice and warning to my php code the Notice is:Undefined index: action in E:\Improsys\psys\index.php on line 135 And when i log out this warning shows Warning: Cannot modify header information - headers already sent by (output started at E:\Improsys\psys\user\index.php:165) in E:\Improsys\psys\user\index.php on line 161 Is there any way to solve this problem.I am a beginner in php and i work in local host. please answer my question to help my php programming improve ---- Server IP: 69.147.83.197 Probable Submitter: 202.168.235.131 ---- Manual Page -- http://www.php.net/manual/en/faq.installation.php Edit -- https://master.php.net/note/edit/73973 Del: integrated -- https://master.php.net/note/delete/73973/integrated Del: useless -- https://master.php.net/note/delete/73973/useless Del: bad code -- https://master.php.net/note/delete/73973/bad+code Del: spam -- https://master.php.net/note/delete/73973/spam Del: non-english -- https://master.php.net/note/delete/73973/non-english Del: in docs -- https://master.php.net/note/delete/73973/in+docs Del: other reasons-- https://master.php.net/note/delete/73973 Reject -- https://master.php.net/note/reject/73973 Search -- https://master.php.net/manage/user-notes.php