Warning: Cannot modify header information - headers already sent by (output started at c:\wamp\www\test-club-asia\index.php:20) in c:\wamp\www\test-club-asia\index.php on line 84
Warning: Cannot modify header information - headers already sent by (output started at c:\wamp\www\test-club-asia\index.php:20) in c:\wamp\www\test-club-asia\index.php on line 85
Warning: Cannot modify header information - headers already sent by (output started at c:\wamp\www\test-club-asia\index.php:20) in c:\wamp\www\test-club-asia\index.php on line 86
Warning: Cannot modify header information - headers already sent by (output started at c:\wamp\www\test-club-asia\index.php:20) in c:\wamp\www\test-club-asia\index.php on line 87
Warning: Cannot modify header information - headers already sent by (output started at c:\wamp\www\test-club-asia\index.php:20) in c:\wamp\www\test-club-asia\index.php on line 88
Warning: Cannot modify header information - headers already sent by (output started at c:\wamp\www\test-club-asia\index.php:20) in c:\wamp\www\test-club-asia\index.php on line 89
Warning: Cannot modify header information - headers already sent by (output started at c:\wamp\www\test-club-asia\index.php:20) in c:\wamp\www\test-club-asia\index.php on line 90
Warning: Cannot modify header information - headers already sent by (output started at c:\wamp\www\test-club-asia\index.php:20) in c:\wamp\www\test-club-asia\index.php on line 91
the line 84 t0 91 are
header("Pragma: public");
header("Expires: 0");
header("Cache-Control: must-revalidate, post-check=0, pre-check=0");
header("Content-Type: application/force-download");
header("Content-Type: application/octet-stream");
header("Content-Type: application/download");;
header("Content-Disposition: attachment;filename=your_file_name.xls");
header("Content-Transfer-Encoding: binary ");
so how to remove this error ?
why getting this error?