PHP - 冷却器功能参数

Question

I have this:

function boo($show_one = false){
  if(!show_one) return 1; else return 2;
}

how can I call boo like this:

boo(SHOW_ALL);

instead of boo(false). I see some native php function have parameters like that which make the code more easy to read

Answer 1

define("SHOW_ALL", false);
define("SHOW_ONE", true);

would correspond to your code there. But I'd reccomend using numbers instead of booleans. What if next weeks you decide to have a SHOW_PAGINATED option?