Exactly. In javascript terms, that is what you'd expect since:

array(1=>'test')

..Isn't a valid array.

2009/3/17 Scott MacVicar <sc...@macvicar.net>:
> On 11 Mar 2009, at 19:25, Christopher Östlund wrote:
>
>> I think this behavior is a bit odd too:
>>
>> php -r "echo json_encode(array(0=>'test'));" // ["test"]
>> php -r "echo json_encode(array(1=>'test'));" // {"1":"test"}
>>
>>
>
> The reason for this is encoding looks to see if the array is sequentially
> numbered from 0 to x, and if so its a compatible javascript array. If it
> starts at any other value or skips a number then it creates an object for
> its output.
>
> Scott
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