PHP Check if array has one item with a value [duplicate]

I need to print both $a and $b but never $c how I can do this with if?

$a = array("1", "2", "3");
$b = array("A");
$c = array("");


var_dump($a); // array(3) { [0]=> string(1) "1" [1]=> string(1) "2" [2]=> string(1) "3" }
var_dump($b); // array(1) { [0]=> string(5) "A" }
var_dump($c); // array(1) { [0]=> string(0) "" }