我遇到过这种语法：var ==“”？ “ - ”：var。有人可以解释一下吗？

The code is this one:

代码就是这个:

$vendors[] = array(
    "id" => $row['vendorID'],
    "name" => $row['name'] == "" ? "-" : $row['name'],
    "tel1" => $row['phone1'] == "" ? "-" : $row['phone1'],
    "tel2" => $row['phone2'] == "" ? "-" : $row['phone2'],
    "mail" => $row['email'] == "" ? "-" : $row['email'],
    "web" => $row['web'] == "" ? "-" : $row['web']);
$vendors[] =