// $set $foo to $bar
    $foo == $bar; 
    
    // print out value of $foo
    echo $foo; 

    // is $bar the same as $foo? if so, return true, otherwise return false
    if ( $bar === $foo ) { // check if the same
        return true; // great, it's true!
    } else { // here we check if it isn't true
        return false; // nope, not true, let's return false
    }

Edited for clarity.