Anass Rahou

Define the constant path to make files requiring action more dynamic.

I have made some few changes to remove "superfluous" code while requiring necessary files in the plugin.

Typo error corrected. # FEATURE_NAME ### Goal ### DESCRIPTION

Define path of the plugin and disallow direct access to improve plugin's security.

Link on php.net site is no longer available.

Adjust drop-down expiry units list position

3

These changes offer a more aligned position, and a nice and orderly view of the drop-down expiry units list.