PHP Warning: Unknown: Input variables exceeded 1000. To increase the limit change max_input_vars in php.ini. in Unknown on line 0

To fix error message:

PHP Warning: Unknown: Input variables exceeded 1000. To increase the limit change max_input_vars in php.ini. in Unknown on line 0

Change/add PHP ini configuration directive max_input_vars default value in main configuration file /etc/php.ini and restart web server Apache using command:

# /sbin/service httpd graceful