Question

I have an array im trying to loop through to create a new type of array specific to my current page.

My array looks like this:

 //$_SESSION['data'] =
 Array ( 
        [0] => 1 
        [1] => 0 
        [2] => Tom 
        [8] => 1 
        [4] => 1 
        [5] => Array ( 
                        [7] => Array ( 
                                    [0] => Andrew 
                                    [1] => 1 
                                    [2] => 1 
                                    [4] => 0 
                                    [5] => avatar.jpg 
                                    [6] => 1 
                                    ) 
                    ) 
        [6] => Array ( [0] => 1 
                       [1] => 2 
                     ) 
 )

So in my JS file i have this:

var stats = <? echo json_encode($_SESSION['data'][5]); ?> ; //this is the array 

my_data = new Array();
for(var key in stats){

    if(key in my_data){} else { //prevent double entry

    my_data[key] = new Array();
    my_data[key][0] = stats[key][6]; 
    my_data[key][1] = stats[key][5];
    my_data[key][2] = stats[key][2]; 
    my_data[key][3] = stats[key][0];
    }
}

console.log(my_data);

Now in console.log i get this :

[undefined × 7, Array[4]
 0: "1"
 1: "avatar.jpg"
 2: "1"
 3: "Andrew"
 length: 4
 __proto__: Array[0]
 ]

I’m wondering why it is saying undefined x7?

Answer 1

Why not use JSON??

var stats = <? echo json_encode($_SESSION['data'][5]); ?> ;

YOu can now iterate normally.

for (x in stats){
     console.log(stats[x]);
}

---

UPDATE

Yes, you will get ‘x7 undefined’. This is because you are directly setting the 8th entry in the js array. (key == 7 in the iteration of for-loop) First 7 entries are essentially undefined.

If you want to use the first few indices, use array.push(..) or manually set the last index using array[array.length] = new_object;