How can i make my website to base its time in online? I dont want it to read my computer's time. I'm currently working on voting system [closed]

date_default_timezone_set('Asia/Manila');
echo date('F j, Y g:i:a  ');

this is my code in time zone. I want to learn how to read time via online not reading my computer's time. A lot of computer is not set in correct time.