Some times, you get below error while posting in Joomla .
“Error : Warning: POST Content-Length of 9897293 bytes exceeds the limit of 8388608 bytes in Unknown on line 0?
then you need to increase “post_max_size” in php.ini file
post_max_size =8M
Replaced with as per your require.
post_max_size = 12 M
then check it.
