Shoutbox

Hi, again! hahaha, I want to make something like this in PHP

if ( $a=yes OR ($b<=10 AND $c<=10) { etc.

Were, <= means "smaller or equal to"
and one condition is $a=yes
and the other conditions is $b<=10 AND $c<=10

I think this could be like...

if ($a=="yes" || ($b<="10" && $c<=10)) {

My question is can i group conditions using ()? Is <= the way you write "smaller or equal to"?

Thank you in advance for your help.