On Z-Index

Common issue but one that I often forget and see people asking about:

The z-index css property does not work on static positioned elements (the default positioning). Make it at least position: relative to make z-index do something.

The problem with Mac users finally getting Steam...

Now that everyone on Macs can experience Valve's games, and Portal in particular, I've noticed a bit of a problem on the internet the last few weeks...

Calculate the age from a DOB in one line

There are lots of complex ways to calculate someone's age from their DOB via PHP, but here's a simple one:

function getAge($dob) {
   return date("Y", time() - strtotime($dob)) - 1970;
}

echo getAge($dob);