Array
(
    [0] => Array
        (
            [month] => April-2014
            [total_booking] => 2
        )

    [1] => Array
        (
            [month] => May-2014
            [total_booking] => 5
        )

    [2] => Array
        (
            [month] => June-2014
            [total_booking] => 25
        )

    [3] => Array
        (
            [month] => October-2013
            [total_booking] => 1
        )

    [4] => Array
        (
            [month] => July-2014
            [total_booking] => 4
        )

)

Array
            (
                [month] => January-2014
                [total_booking] => 0
            )

foreach ($newarray as $month => total_booking) {
         //sorting

      }



     foreach ($newarray as $month => total_booking) {
             //if there is no month in array betwean to_month and from_month it

            should be  included in correct place as sorted

          }