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 = array('one', '', '', 'four', '', 'six'); implode('-', $array); 

yields:

one---four--six 

instead of (IMHO the preferable):

one-four-six 

Any other built-ins with the behaviour I'm looking for? Or is it going to be a custom jobbie?

Answer 1

You can use array_filter():

If no callback is supplied, all entries of input equal to FALSE (see converting to boolean) will be removed.

implode('-', array_filter($array)); 

Obviously this will not work if you have 0 (or any other value that evaluates to false) in your array and you want to keep it. But then you can provide your own callback function.

Answer 2

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'));