(adsbygoogle = window.adsbygoogle || []).push({}); Im trying to do this, and I can't find anything on it.

like lets say...

    

$age = mysql_query(" SELECT age FROM staff WHERE username = '". $_SESSION['username'] ."' ");

how can I get the "age"

so like

    

if ($age < 21) 

{

echo "You are a child.";

}else{

echo "You are an adult.";

}