note 112155 modified in function.array-filter by googleguy

If you need this function to return falsy results (like "0"), yet discard truly empty ones (that have a 0 string length, like null, false, ''), you can use strlen() as the callback: <?php array_filter($array, 'strlen'); ?> --was-- If you need this function to return falsy results (like "0"), yet discard truly empty ones (that have a 0 string length, like null, false, ''), you can use strlen() as the callback: <?php array_filter($array, 'strlen'); ?> Another option is to use the ord() as the callback, which should be ~7-8% faster on average (because it only uses the first character). http://php.net/manual/en/function.array-filter.php