This is a simple one but I am all for making code neater, tidier and more readable.
If you are using a boolean value for evaluating an IF statement, you would typically:
$valid = true; if ($valid == true) { # do something } else { # do something else }
A shorter and more readable (try saying it out loud in pseudo code) method would be:
if ($valid) { # do something }
And to test for false:
if (!$valid) { # do something }
A basic one, but I find the little touches make a big difference.
