using php can you make a code to replace any variable less then 0 with 0?

[T G]

heres the real question..

im writing a game and im having the problem with negative health if you get hit too hard..

i want it to be if you have less then 0 health replace with 0

 

[TygrHawk]

I'm not real familiar with PHP, but I believe it would be something like this:

if ($health < 0) {
$health = 0;
}

 

[Peter K]

if ($health<0)
{
$health=0;
echo "You are dead :-( ";
}