function product($carry, $item) { $carry *= $item; return $carry; }
$a = array(1, 2, 3, 4, 5); $x = array();
var_dump(array_reduce($a, "sum")); // int(15) var_dump(array_reduce($a, "product", 10)); // int(1200), because: 10*1*2*3*4*5 var_dump(array_reduce($x, "sum", "No data to reduce")); // string(17) "No data to reduce" ?>