PHP: Check if variable exist but also if has a value equal to something

Question

I have (or not) a variable $_GET[\'myvar\'] coming from my query string and I want to check if this variable exists and also if the value corresponds to somethi

Answer 1

A solution that I have found from playing around is to do:

if($x=&$_GET["myvar"] == "something")
{
    // do stuff with $x
}