Sorting array question

I've got an array, $points1, just had a problem sorting it though...

print "points1 type: ".gettype($points1)."<br>";
$points2 = rsort($points1);
print "points2 type: ".gettype($points2);

This gives
array
boolean

Which really confuses me!
I can do what I want as below...

print "points1 type: ".gettype($points1)."<br>";
$points2 = $points1;
rsort($points2);
print "points2 type: ".gettype($points2);

and get
array
array

just fine, but why doesn't the above code using
$var1 = rsort($var2); work?

Thanks for any help

I would think because rsort returns boolean. So if, rsort had a problem sorting points1, prints2 would be false.

I think the way you did it is fine, because i cant think of another way to do it right now.

Thanks for the reply anyways.

I mean sure I got around it, I could just swear I'd been able to sort an array directly into a different variable on the same line in the past.

Are there any array sorting functions that do allow it as in

$var1 = function_name($var2); ?

sort and rsort certainly don't.

Make your own function that does that, coz PHP doesn't have one.

Diego