获取数组内部的数据ArrayObject

Question

MONTHLY_PAYMENT: "9.7",
MAINTAINANCE_FEE: "20000",
areapoints: [
{
station: "大塚",
bus: null,
walking_distance: null
},
{
station: null,
bus: null,
walking_distance: null
},
{
station: null,
bus: null,
walking_distance: null
}
]

Getting the monthly payment and maintenance fee is easy, I just use $room->MONTHLY_PAYMENT .

But there is an arrayobject inside of the array which I am getting an error when I use $room->areapoints[0]->bus

This is the error:

Undefined property: ArrayObject::$bus

What am I doing wrong here

Answer 1

Your property of $room->areapoints[0]->bus is null in your list syntax. Therefore, that property doesn't exist.

You need to check if it exists before using it with:

if (isset($room->areapoints[0]->bus)) {
    // ... CODE HERE ...
}

Answer 2

将$room->areapoints[0]->bus更改$room->areapoints[0]->bus $room->areapoints[0]['bus']