note 1033 deleted from sizeof by danbeck

If you're used to arrays in other languages, this function may trip you up: it returns the number of elements in the array that is actually filled. If only myarray[2] has a value and mayarray[0] and myarray[1] do not, then *sizeof(mayarray)* will return *1*, not *3*. This is caused by the fact that arrays here are actually always associative arrays. If you're filling some elements of the array using an index counter, you may want to save the counter value for the highest element to access the array later on. count() does the same thing: it also returns only the number of actually _filled_ elements.