PHP Max Input Vars means the maximum number of variables your server can use for a single function to avoid overloads.
The max_input_vars can be set by modifying multiple files. They are .htaccess, php.ini, .user.ini, or wp-config.php. files. You are gonna need FTP access to modify those files. You can find the credentials for your FTP access from your hosting provider.
To set max_execution_time please follow the steps given below,
- Go to your WordPress root installation folder and locate any of these files .htaccess, php.ini, .user.ini or wp-config.php
- Select any of the files above and Edit and paste the code given below,
Save the file.
It's better to ask the Hosting to increase this value.
php_value max_input_vars 4000
for php.ini or .user.ini
max_input_vars = 4000
@ini_set( 'max_input_vars' , 4000 );
The recommended limit is 4000 minimum.