How to pass options into Javascript from PHP?

I use BootstrapValidator as my validation component. I need to give options which are gathered from PHP into its constructor like this:

PHP Code to generate fields:

$fields = "";
foreach ($form["questions"] as $key => $value) {
    if (!empty($value["validators"])) {
        $fields .= "\"" . $key . "\":" . json_encode($value["validators"]) . ",";
    }
}
$new_fields = "{" . chop($fields, ",") . "}";

Javascript part is:

$('#my_form').bootstrapValidator({
    message: 'This value is not valid',
    feedbackIcons: {
        valid: 'glyphicon glyphicon-ok',
        invalid: 'glyphicon glyphicon-remove',
        validating: 'glyphicon glyphicon-refresh'
    },
    fields: <?php echo $new_fields; ?>
});

It prints something like that:

     $('#fc_register_form').bootstrapValidator({
            message: 'This value is not valid',
            feedbackIcons: {
                valid: 'glyphicon glyphicon-ok',
                invalid: 'glyphicon glyphicon-remove',
                validating: 'glyphicon glyphicon-refresh'
            },
            fields: {
                "field_1": {"notEmpty": {"message": "The ****** cannot be empty"}},
                "field_1_confirm": {
                    "notEmpty": {"message": "The ******* must be same with first input for ******."},
                    "identical": {
                        "field": "field_1",
                        "message": "The given value is not same with first input for ****"}
                },
                "field_2": {"notEmpty": {"message": "The ******* empty"}},
                "field_3": {"notEmpty": {"message": "The ******* empty"}},
                "field_4": {"notEmpty": {"message": "The ****** is required and cannot be left empty"}}
            }
        });

So, may double quotes cause it not to work? Or what is wrong with that? It should not be that much though, i guess...

Solution

Yeap, i figured it out what i was doing wrong.

It is not about how i encoded my array $fields, it is about missing a child validatorswhich is required by bootstrapValidator.

I just changed this:

........ $fields[$key] = $value["validators"]; ........

into this:

........ $fields[$key]["validators"] = $value["validators"]; ........

And it converts my entire object to what bootstrapValidator required. Also thanks for owner of bootstrapValidator to make me aware of that I missed the validatorskey.

Here is the complete library link: https://github.com/nghuuphuoc/bootstrapvalidator

Hope you guys find it useful.