意外的令牌，但是哪个令牌？

Question

I have a link with a magento shop, which outputs the following json(please ignore the bogus values for testing purposes):

jsfiddle http://jsfiddle.net/ZkZ4D/

non pretty formatting, output by php

[[{"customer_address_id":"4","created_at":"2013-01-14 10:49:59","updated_at":"2013-01-14 10:49:59","city":"abc town","country_id":"NL","firstname":"john","lastname":"doe","postcode":"7091 eh","street":"mwhahah 47
mwhgahahahaha","telephone":"31645494440","is_default_billing":true,"is_default_shipping":true}],[{"customer_address_id":"4","created_at":"2013-01-14 10:49:59","updated_at":"2013-01-14 10:49:59","city":"abc town","country_id":"NL","firstname":"john","lastname":"doe","postcode":"7091 eh","street":"mwhahah 47
mwhgahahahaha","telephone":"31645494440","is_default_billing":true,"is_default_shipping":true}]]

pretty formatting for human reading

[
    [
        {
            "customer_address_id": "4",
            "created_at": "2013-01-14 10:49:59",
            "updated_at": "2013-01-14 10:49:59",
            "city": "abc town",
            "country_id": "NL",
            "firstname": "john",
            "lastname": "doe",
            "postcode": "7091 eh",
            "street": "mwhahah 47
mwhgahahahaha",
            "telephone": "31645494440",
            "is_default_billing": true,
            "is_default_shipping": true
        }
    ],
    [
        {
            "customer_address_id": "4",
            "created_at": "2013-01-14 10:49:59",
            "updated_at": "2013-01-14 10:49:59",
            "city": "abc town",
            "country_id": "NL",
            "firstname": "john",
            "lastname": "doe",
            "postcode": "7091 eh",
            "street": "mwhahah 47
mwhgahahahaha",
            "telephone": "31645494440",
            "is_default_billing": true,
            "is_default_shipping": true
        }
    ]
]

How do I get the above json?

php code

class ajax extends plantinaNLmagento
    {
    public function __construct()
        {
        parent::__construct();
        } 
    public function getCustomerAdressAjax()
        {
        $id = (int)$_GET['customerid'];
        $q = $this->db->query("SELECT * FROM `tbl_magento_users` WHERE `core_id`=:ID",array('ID'=>$id));
        $customeradresses = array();
        while($who = $q->fetchObject())
            {
            $x=$this->mage->call('customer_address.list',$who->magento_ID);
            array_push($customeradresses,$x); 
            array_push($customeradresses,$x);
            }
        header('Cache-Control: no-cache, must-revalidate');
        header('Expires: Mon, 26 Jul 1997 05:00:00 GMT');
        header('Content-type: application/json');
        echo json_encode($customeradresses);
        }
    }

I'm pushing the $customeraddress twice for testing purposes.

Now if I paste the resulting json into jsonlint or other json validators it all says it's valid json.

When I use it int he function JSON.parse or jQuery.parseJSON I get a unexected token error, but it doesn't say which token or where, and since my json passes the valdation I'm totally at a loss which token it fails at.

I must be missing something in the category of facepalm but I simply can't find it...

error message SyntaxError: Unexpected token

Answer 1

You JSON data is perfectly valid but you must also make sure that your PHP script sends only the JSON data and nothing else (notice, warning, error, etc will break the JSON).

To check, use your browser's development tools, FireBug, etc, and look at the network inspector tab to see the actual response sent by PHP. Fix them errors if necessary.

As for your fiddle: JSON data cannot be used inside JavaScript strings as-is. At minimum you must escape the backslashes (e.g. the JSON "Hello World" should become '"Hello\ World"').