Getting through the weekend

My upcoming weekend will be filled with a lot of fun and excitement, I have another World Jamboree troop-weekend. Check out this site to see the other people of my troop.

For the people that can not spend a weekend without wondering about PHP I have a little exercise. What is the output of the following piece of code:
function foo($param1, $param2){
$param1 + $param2;

$result = foo(1,2);

echo $result;


Will it be an error, the result of the function or nothing at all? Don't spoil the fun by running it in PHP without thinking about it! The answer was a little surprising for me.

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