How to Increase max_input_vars in PHP Ubuntu

Websolutionstuff | Feb-02-2024 | Categories : Other

Hey folks! If you've ever encountered issues with PHP hitting the max_input_vars limit, you're not alone. In this guide, I'll walk you through the steps to increase the max_input_vars settings on Ubuntu. Let's dive right in!

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You can use this command with your Ubuntu 16.04, ubuntu 18.04, ubuntu 20.04, ubuntu 21.04, ubuntu 21.10, ubuntu 22.04, or ubuntu 22.10.

Find PHP Configuration File:

First, we find the PHP configuration using the following command.

php -i | grep php.ini

You will find the following output and copy the loaded php.ini file path:

Configuration File (php.ini) Path => /etc/php/8.1/cli
Loaded Configuration File => /etc/php/8.1/cli/php.ini

In most Ubuntu setups, the configuration file is located at /etc/php/{PHP_VERSION}/apache2/php.ini. Open your terminal and use your favorite text editor to open the file:

sudo nano /etc/php/{PHP_VERSION}/apache2/php.ini

Replace {PHP_VERSION} with your PHP version, for example, 7.4 or 8.0.


Step 2: Find max_input_vars Setting

Now that you're in the PHP configuration file, look for the max_input_vars setting. You can use Ctrl + W in nano to search. It should look something like this:

post_max_size = 100M
upload_max_filesize = 100M
max_file_uploads = 20
max_input_vars = 1000
memory_limit = -1


Step 3: Update max_input_vars Value

Increase the max_input_vars value to meet your application's needs. For example, set it to 5000:

max_input_vars = 5000

Feel free to adjust this value based on your specific requirements.


Step 4: Save and Close

Save the changes by pressing Ctrl + X, then press Y to confirm, and finally press Enter to exit.


Step 5: Restart Apache

For the changes to take effect, you need to restart the Apache web server. Run the following command in your terminal:

sudo service apache2 restart

If you're using Nginx or another web server, adjust the command accordingly.


Step 6: Verify the Changes

To ensure that the changes have been applied, create a simple PHP script (e.g., phpinfo.php) in your web server's root directory with the following content:


Access this script in your browser and search for "max_input_vars" to confirm that the new value is reflected.

And there you have it! You've successfully increased the max_input_vars in PHP on Ubuntu. If you ever need to adjust it again, just revisit the configuration file and make the necessary changes.

Happy coding! 🚀


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