How do I access a JSON array in JavaScript

I have a PHP script to which I make an Ajax request, and most of it works okay, but I’m having trouble accessing an array in the data returned to the JavaScript function.

So, the PHP has a bunch of regular variables, and one array. The array, $places, has four elements, which each have three values, as so:

[["z","815","1"],["w","2813","0"],["s","1582","2"],["b","1220","5"]]

A relevant excerpt of the PHP script is:

$encoded_places = json_encode($places);  // if I don't do this then I end up with a value of "Array"
$qobject->name = "$name";
$qobject->multi = "$multi";
$qobject->places= "$encoded_places";

$myJSON = json_encode($qobject);
echo $myJSON;

In the JavaScript script (using JQuery), I successfully obtain the data from the Ajax request, and I can access all the data okay, except the $places data.

 $.getJSON(url, function(data, status){

   var stringified = JSON.stringify(data);
   var parsedObj = JSON.parse(stringified);

   var x = parsedObj.name; // alert(x);  // which works fine

   var myArray = new Array();
   myArray.push(parsedObj.places);

   for(var i = 0; i < myArray.length; i++){
        console.log(myArray[i]);
   }

… and the console will display what I’m expecting, namely:

[["z","815","1"],["w","2813","0"],["s","1582","2"],["b","1220","5"]]

However, I’m having difficulty accessing these values. For example, supposing I try to access the “815” portion of the first element, with something like: myArray[0][1], all I end up with is “[“.

I guess somehow this whole piece of data is just a string, instead of an array, but I’m not familiar enough with JavaScript to quite know how to progress.

If, for example, I do this in the JavaScript script (hoping to see 815, 2813, 1582 and 1220 in the alerts) all I’ll see is the single alert with “[“. (i.e. it does the loop only once, and selects the character in position 1).

for(var i = 0; i < myArray.length; i++){
    console.log(myArray[i]);
    alert(myArray[i][1]);                                                                                                             
}

I would very much appreciate someone explaining: (a) how I can access the individual elements and values in JS (b) how I can loop through them, although presumably once it’s an array and not a string then the code above should do this.

Many thanks for any assistance.

Now Resolved: As noted by @charlietfl, below, using quotes in

$qobject->places= "$encoded_places";

screwed things up, along with using json_encode on $places. However, without removing the quotes nothing worked either way. So, removed quotes and just used json_encode on the entire structure at the end, which now works fine.

So, the original snippet of code, given above, now looks like:

$qobject->name = $name;
$qobject->multi = $multi;
$qobject->places= $places;

$myJSON = json_encode($qobject);
echo $myJSON;

Answer

Change

$qobject->places = "$encoded_places";

To

$qobject->places = $places;

And get rid of the $encoded_places = json_encode($places); so that the one call to json_encode serializes the whole structure