PHP: setting a number as key in associative array - php

Question

I'm trying to recreate json from a DB, for the client side. Unfortunately some of the keys in the json are numbers, which work fine in javascript, however as a result PHP keeps treating them as numeric instead of associative arrays. each key is for a document. let me show you:
PHP:
$jsonobj;
while ($row = mysql_fetch_assoc($ms)) {
$key = strval($row["localcardid"]);
$jsonobj[$key] = json_decode($row["json"]);
}
// $jsonobj ist still a numeric array
echo json_encode($jsonobj);
the resulting json should look like this:
{
"0": {
"terd": "10",
"id": 0,
"text": "",
"pos": 1,
"type": 0,
"divs": [
{},
{}
],
"front": 1
}
"1": {
"terd": "10",
"id": 0,
"text": "",
"pos": 1,
"type": 0,
"divs": [
{},
{}
],
"front": 1
}
}
One obvious solution would be to save the whole json without splitting in up. however that doesnt seem wise in regards to the db. i wanna be able to access each document seperately. using
$jsonobj = array ($key => json_decode($row["json"]));
obviously works, but unfortunately just for one key...
EDIT: for clarification*
in php: there's a difference between
array("a", "b", "c")
and
array ("1" => "a", "2" => "b", "3" => "c").
the latter, when done like this $array["1"] = "a" results in array("a") instead of array("1" => "a")
ANSWERED HERE

Answer 1

Try
echo json_encode((object)$jsonobj);

Answer 2

I believe if you pass the JSON_FORCE_OBJECT option, it should output the object with numeric indexes like you want:
$obj = json_encode($jsonObj, JSON_FORCE_OBJECT);
Example:
$array = array();
$array[0] = array('test' => 'yes', 'div' => 'first', 'span' => 'no');
$array[1] = array('test' => 'no', 'div' => 'second', 'span' => 'no');
$array[2] = array('test' => 'maybe', 'div' => 'third', 'span' => 'yes');
$obj = json_encode($array, JSON_FORCE_OBJECT);
echo $obj;
Output:
{
"0": {
"test": "yes",
"div": "first",
"span": "no"
},
"1": {
"test": "no",
"div": "second",
"span": "no"
},
"2": {
"test": "maybe",
"div": "third",
"span": "yes"
}
}

Answer 3

Simply save both inside a single entry in the database: the separate field values AND the whole json structure inside a separate column. This way you can search by single fields and still get the valid json structure for easy handling.

Answer 4

For setting a number as key in associative array we can use following code
$arr=array(); //declare array variable
$arr[121]='Item1';//assign Value
$arr[457]='Item2';
.
.
.
print_r($arr);//print value