我如何在脚本中分配php定义常量值

这基本上是一个ajax响应，我想从配置文件中分配位置，我存储在常量

define(BASE_URL, "http://example.net/lc-latest/");
$website =  BASE_URL ;

if (response["success"] == true) {
    $("#showMessage").html(response['message']);
    location = "/lc-latest/gdpi.php?jobid="+response["id"]
    /* I want to re write this link as `$website` so that if I changed
    the project location it should not disturb.*/
    location = "<?php BASE_URL ?>gdpi.php?jobid="+response["id"] //can i write like this in script of ajax response.?
    window.open(location);
  }