This is very simple way to find php.ini file to make changes. You need to have access to these files, and SSH login.
Step 1: To quickly find the file type:
php -i | grep 'Configuration File'
It will show you the location of the file. For most VPS servers, the file is located is /usr/local/lib.
Step 2: Enter the following command to change the directory:
Step 3: You can use ls command to confirm the location. This command will display list of all the files and directories in the current location.
Step 4: To edit the file: