Hey I'm submiting an array on post where each value is a json string, like this :

```
Array
(

    [destinations] => Array
        (
            [0] => {"selected_value":185,"destinations":38709,"type":"cl","name":"name1"}
            [1] => {"selected_value":395,"destinations":28867,"type":"cl","name":"name2"}
        )

)

```

Now when I decode it :

```
    foreach($destinations as $json){
            $row = json_decode($json,true);
   ...
  }

```

It works fine, however if I try and run form validation on the destinations :

```
$this->form_validation->set_rules('destinations', 'Destinations', 'required');

```

I can no longer `json_decode` the value, tough it seems to be fine, if I echo it I can see :

```
{"selected_value":395,"destinations":28867,"type":"cl","name":"name2"}

```

But the decode doesn't work and `$row` is null.

Running `json_last_error` gives : 4
and var\_dump of `$json` gives :

```
string(143)
 "{"selected_value":185,"destinations":38709,"type":"cl","name":"07h00 תקינים"}" 

```

**Note:** the name values are in hebrew, I gave an example in english so easier to read.

I've tried working around it by creating a custom callback function because I thought the implemntation of required is the problem, but I got same results.
Does anyone know this bug or/and how can it be fixed?
I know I can just check it regullary but I would rather use CI's form validation.
I'm using codeigniter 2.1.3, without an option to upgrade.