How to adjust max_vars_input on CWP

To adjust the max_input_vars setting on CWP (CentOS Web Panel), you can modify the PHP configuration for the server or for specific domains. The max_input_vars setting controls the maximum number of input variables that PHP can process in a single request, and increasing it may be necessary for handling large forms or complex applications.

A. Adjust max_input_vars Globally( for a Specific PHP Version ) #

Please note that if you are on free version of CWP, the following steps will make changes for the current PHP version. However if you are on pro-version, you can use PHP Selector feature to make changes for each PHP version independently.

Steps

1. Log into CWP Admin using these steps #

2. Open the PHP ini file #

• From the CWP admin dashboard, on the left-side pane, go to PHP Settings->PHP.ini COnfiguration and click on it.

3. Edit the php.ini File #

• You will be directed to the page where you can edit the php.ini configuration file.
• Alternatively, you can edit the file manually via SSH at the following location

/usr/local/php/php.ini

• Search for the max_input_vars setting in the php.ini file and remove the preceeding semi colon, then give it a value that you want
• If it’s not already present, add it

max_input_vars = 3000

4. Save Changes:

• After making the change, save the file.

5. Restart Apache/PHP-FPM:

• For the changes to take effect, you need to restart the web server or PHP-FPM depending on the PHP handler in use.
• You can restart services via CWP’s interface or by running the following commands via SSH:

systemctl restart httpd   # For Apache

systemctl restart php-fpm # For PHP-FPM

A. Adjust max_input_vars for a Specific Domain #

To adjust max_input_vars for a particular domain, you can use a .htaccess file or modify the php.ini file specific to the domain.

• Access the Domain’s user panel using these steps

• On the panel’s landing page, check the left side pane and go to CWP Settings->Edit php.ini or scroll down toCWP Settings->Edit php.ini

• Click on Edit php.ini to access the php.ini editor
  • Click on Advanced Editor. You will see other existing settings in the editor.

• On a new line, add the following code. Adjust the 3000 to be a value that you desire.

max_input_vars = 3000

• Once added, click on Save to save your changes

By following these steps, you can adjust the max_input_vars setting globally or for specific domains on your CWP (CentOS Web Panel) server.