导航返回的对象

Question

In PHP I have a multidimensional object created from looping through a list of ids

 $summary = array();
 foreach ( $request->id as $id ) {
 ...
 $summary[] = $summary_data;
 }

it's then passed to my javascript.

 return json_encode(array('summary' => $summary));

Not sure how to navigate the returned object correctly. Do I have to use the original list of id's, and use that as an index against this object? Or is there a better way to keep track of this?

End result, I want a select box such that when a new item is selected, its data is displayed.

Answer 1

A general JSON object would look like this (trying to put all possible cases):

{
    "key1":"value1", 
    "subObject":{
        "subKey1":"subValue1",
        "subKey2":"subValue2"
    },
    "arrayOfSubObjects":[
        {"subKey3":"subValue3"},
        {"subKey4":"subValue4"}
    ]
}

You can reference any element of a JSON object with jsonObject.key, but remember those part between [] are arrays so you'll need to index them as if they were in an array so:

// to point subKey1:

jsonObject.subObject.subKey1;

// to point subKey3

jsonObject.arrayOfSubObjects[0].subKey3;

OR

// to point subKey1:

jsonObject["subObject"]["subKey1"];

// to point subKey3

jsonObject["arrayOfSubObjects"][0]["subKey3"];

note the 0 has no quotes because it's an index.