$var = [
           {
             "D1" => 1,
             "D2" => 2
           },
           {
             "D2" => 5, 
             "D3" => 6 
           },
];

##</code><code>##

$var = 
           (
             "D1" => 1,
             "D2" => 7
             "D3" => 6 
           )


##</code><code>##

$var = 
           (
             "D2" => 7
             "D3" => 6 
             "D1" => 1,
           )