How to Increase memory_limit in PHP Ubuntu?

 Find PHP Configuration File Location:

Here, you need to run the following command to get the currently loaded php.ini file in your ubuntu system.

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
Update php.ini File: 
Here, you need to run the following command to open the php.ini file and update it using the nano command:
sudo nano /etc/php/8.1/cli/php.ini
Next, the php.ini file will open, find the following variable, and update the value:
post_max_size = 100M
upload_max_filesize = 100M
max_file_uploads = 20
  
max_input_vars = 200
memory_limit = -1
Then save it.
Nano: Press Ctrl + O (Write Out) and then Enter to save the file.
Restart Apache Server:
Next, restart your apache server using the following command:
sudo service apache2 restart