How can I implode an array while skipping empty array items?

Question

Perl\'s join() ignores (skips) empty array values; PHP\'s implode() does not appear to.

Suppose I have an array:

$array = a         


        

Answer 1

I suppose you can't consider it built in (because the function is running with a user defined function), but you could always use array_filter.
Something like:

function rempty ($var)
{
    return !($var == "" || $var == null);
}
$string = implode('-',array_filter($array, 'rempty'));