Php会话不存储在相同的数组中，而是创建新数组。

I am trying to store variables on a session array on a multiple page web site but it keeps on replacing the data and not storing it whenever a new data is added, I would be very thankful if anyone can help I have been trying to work on it for a long time and I read different helpful tips about it but I still don't know what I am doing wrong in here. I am trying to store variables on a session arr