PHP functions

timezone must define first

date_default_timezone_set('Asia/Hong_Kong');

$today = date("Y-m-d h:i:s");

pathinfo($filename, PATHINFO_EXTENSION);

Welcome to Michael's code notepad

Let's focus on code structure and logic

Syntax changed all the time, in every language.

I confess I can't memorize them all. 

Piece of codes were kept here for my own emergency.