I want to get the data from json.
My json file is like this 

```
[[["test demo","",,,0]],,"vi",,,,0.58984375,,[["vi"],,[0.58984375]]]

```

I want to get the data "test demo" so i create code like this 

```
$html = file_get_contents("jasonfile");
$obj1 = json_decode($html, true);

echo $obj1[][][];

```

but it does not working.
what i am doing wrong please help me on this..