如果我需要这些键同时具有值​​（从数据库传递），我如何将键添加到PHP数组？

The problem is here: I'm trying to write a code which would make a dynamic PHP array. I have an empty array, to which need to add keys with their values, values being passed by a do-while loop from the MySQL server. The following php code:

$result=mysqli_query($link,"SELECT products_id,voted,rating FROM      table_products $sorting LIMIT 6");
if(mysqli_num_rows($result)>0) {

$a = array();
do {

    $row = mysqli_fetch_array($result);
    $obj=$row['products_id'];
    $rating=$row['rating'];
    $voted=$row['voted'];



    array_push($a,array('obj'.$obj => array('rating' =>
        $rating, 'voted' => $voted)));

} while ($row = mysqli_fetch_array($result)
);}

$json = json_encode($a);
echo $json;

...gives me this json string:

[{"obj1":{"rating":"25","voted":"5"}},{"obj3":{"rating":"36","voted":"10"}},{"obj5":{"rating":"6","voted":"4"}}]

...but I need this:

["obj1":{"rating":"25","voted":"5"},"obj3":{"rating":"36","voted":"10"},"obj5":{"rating":"6","voted":"4"}]

So how can I push this:

'obj'.$obj => array('rating' => $rating, 'voted' => $voted)

whithout putting it in a separate array, like I did in my code? I just don't know a right way to implement this.

Change

array_push($a,array('obj'.$obj => array('rating' => $rating, 'voted' => $voted)));

To

$a['obj'.$obj] = array('rating' =>  $rating, 'voted' => $voted);

Try this instead of array_push

$a = array_merge($a, array(
    'obj'.$obj => array(
        'rating' => $rating,
        'voted' => $voted
    )
));