Identify different php.ini files

This find command:

find /etc -name php.ini 

returns:

/etc/php/7.1/apache2/php.ini
/etc/php/7.1/cli/php.ini

Identify loaded php.ini files from command line

This command:

php --ini

returns:

Configuration File (php.ini) Path: /etc/php/7.1/cli
Loaded Configuration File:         /etc/php/7.1/cli/php.ini
Scan for additional .ini files in: /etc/php/7.1/cli/conf.d
Additional .ini files parsed:      /etc/php/7.1/cli/conf.d/10-mysqlnd.ini,
/etc/php/7.1/cli/conf.d/10-opcache.ini,
/etc/php/7.1/cli/conf.d/10-pdo.ini,
/etc/php/7.1/cli/conf.d/15-xml.ini,
...

Get configuration values from the command line

This command returns:

php -i | grep upload_max_filesize

returns:

upload_max_filesize => 2M => 2M

Common configuration to change in php.ini files:

memory_limit
max_execution_time
max_input_time
post_max_size
upload_max_filesize

display_errors
html_errors