Today a friend and I made a demo of moodle to some teachers but when we we try to get the excel exportation of our grades we got the following message:
Warning: Cannot modify header information - headers already sent by (output started at /var/www/test/moodle154/mod/dfwiki/blocks/lib.php:13) in /var/www/test/moodle154/grade/lib.php on line 1287
Warning: Cannot modify header information - headers already sent by (output started at /var/www/test/moodle154/mod/dfwiki/blocks/lib.php:13) in /var/www/test/moodle154/grade/lib.php on line 1289
Warning: Cannot modify header information - headers already sent by (output started at /var/www/test/moodle154/mod/dfwiki/blocks/lib.php:13) in /var/www/test/moodle154/grade/lib.php on line 1290
Warning: Cannot modify header information - headers already sent by (output started at /var/www/test/moodle154/mod/dfwiki/blocks/lib.php:13) in /var/www/test/moodle154/grade/lib.php on line 1291
Warning: Cannot modify header information - headers already sent by (output started at /var/www/test/moodle154/mod/dfwiki/blocks/lib.php:13) in /var/www/test/moodle154/grade/lib.php on line 1292
Warning: Cannot modify header information - headers already sent by (output started at /var/www/test/moodle154/mod/dfwiki/blocks/lib.php:13) in /var/www/test/moodle154/grade/lib.php on line 1289
Warning: Cannot modify header information - headers already sent by (output started at /var/www/test/moodle154/mod/dfwiki/blocks/lib.php:13) in /var/www/test/moodle154/grade/lib.php on line 1290
Warning: Cannot modify header information - headers already sent by (output started at /var/www/test/moodle154/mod/dfwiki/blocks/lib.php:13) in /var/www/test/moodle154/grade/lib.php on line 1291
Warning: Cannot modify header information - headers already sent by (output started at /var/www/test/moodle154/mod/dfwiki/blocks/lib.php:13) in /var/www/test/moodle154/grade/lib.php on line 1292
A possible "dirty" solution is requesting php to hide warnings, but I don't like much to go into this way. Any suggestion about how to fix this?
I made some search in the forum but the closest solution I found was related with "blank spaces" at the end of dfwiki.php so I reviewed all my dfwiki.php files and looks like them all are ok.
Thanks a lot in advance,
m.