用PHP计算两个值js的价格

Question

感谢ph1409，我找到了这个解决方案https://jsfiddle.net/poojjaval/a9u4mkwy/7 但是我一直在尝试使此脚本与PHP和MySQLi一起使用，例如，设置数据库的性别和体重范围的类型并将其加载到此脚本中，但是我似乎没有任何操作。谁能指出我正确的方向？

function Ticket(gender, weight) {
  this.gender = gender;
  this.weight = weight;
}

Ticket.prototype.getPrice=function() {
  var price;

  if(this.gender === "male" && this.weight > 200){
    price=20;
  }
  else if(this.gender === "female" && this.weight > 200) {
    price=15;
  }
  else if(this.gender === "male" && this.weight <= 200) {
    price=10;
  }
  else if(this.gender === "female" && this.weight <= 200) {
    price=7;
  }

  return price;
}

$("select").change(function() {
  var genderOptions = [];

  $("select option:selected").each(function() {
    genderOptions.push($(this).text() + " ");
  });

  var newTicket = new Ticket($("#gender").val(),$('#weight').val());
  var multiplyVal = newTicket.weight * newTicket.getPrice();

  $("#yourTicket").text("Gender: " + newTicket.gender + " Weight: " + 
  newTicket.weight + " $" + newTicket.getPrice().toFixed(2) + " and your 
  multiplied value is " + multiplyVal);
});