PHP使用两个表创建树视图

Question

我有两个mysql表

  1. questions
  2. answers 

问题表有问答表有相关答案 每个答案都指向一个问题，所以它有水平

离

question 1 -> answer 1 -> question 2
           -> answer 2 -> question 3
           -> answer 3 -> question 4 -> answer 1 -> question 5
                                     -> answer 2 -> question 6
                                     -> answer 3 -> question 7
question 8 -> answer 1 -> question 9
           -> answer 2 -> question 10-> answer 1 ->question 12
                                        answer 2 ->question 13
           -> answer 3 -> question 11 

我需要以树状视图显示问题

离

question 1->question2
            question3
            question4->question 5
                       question 6
                       question 7
question 8->question 9
            question 10->question 12
                         question 13
            question 11

我的问题表字段

id  qtype   qtext

我的回答表字段是

id  answer  quzid   targetquz

任何人都知道如何使用基于这两个表的php创建树视图。非常感谢你。

Answer 1

希望我不会在这里误解事物（不确定你是否故意在没有任何答案的情况下回答另一个问题）;但一般来说我会使用while循环。

while()
{ first level here
while()
     { second level here
        while()
          { third level here
           ....
}
}
}