PHP gets the input variables from the HTML forms and cookies. By default, it limits the number of input variables. This limit affects your $_GET, $_POST and $_COOKIE. You can fix this by increasing the max_input_vars directive in .htaccess file.

The below steps will guide you to increase the max_input_vars value in .htaccess file.

Step 1: Connect to your server via FTP.

Step 2: Locate .htaccess file in the root of your site directory.

Step 3: Add the below line of code at the end of the .htaccess file.