[php] Calculate Age in Days

Just today while driving back home, a random question came across my mind,

What is my age in number days?

Now, I am not good at maths to figure it out manually but since I am decent php programmer, I wrote this small code snippet which helps calculate my age counting in terms days. And its just one line!

$birthday = '1989-03-06';
$now = date("Y-m-d");
echo 'You are '. date_diff(date_create($birthday), date_create($now))->format('%a days old');

So according to this,
Today is the 8,244th day of my life. Cheers!