@Stew

The php.ini file should be located in the /etc/php directory, more specifically:

/etc/php/7.0/apache2/

If you’re not using PHP 7.x, then look in /etc/php and find the version you are using and replace the 7.0 in the path above with the version you’re using.

i.e. - if you’re using 5.6, then your path may look something like:

/etc/php/5.6/apache2/