PHP collects the input variables from the cookies enabled on-page from the GET and POST requests. By default, the PHP scripts can only take 1000 variables and many WordPress themes require Max Input Variables to be increased from the default values. Please refer to the below steps to change max input vars in cPanel.
- Login to your cPanel account.
- Click on the MultiPHP INI Editor under the software section.
- Select the location of php.ini for which you want to increase and click on the Apply button.
- Now find the max_input_vars and enter your preferred value in it then click on the Apply button at the bottom of the page.