Below array need to sort by planning_no field
Array
        (
            [0] => stdClass Object
                (
                    [planning_no] => 100-3
                    [pieces] => 0
                )
            [1] => stdClass Object
                (
                    [planning_no] => 100
                    [pieces] => 0
                )
            [2] => stdClass Object
                (
                    [planning_no] => 100-2
                    [pieces] => 0
                )
            [3] => stdClass Object
                (
                    [planning_no] => 100
                    [pieces] => 148
                )
            [4] => stdClass Object
                (
                    [planning_no] => 102
                    [pieces] => 0
                )
            [5] => stdClass Object
                (
                    [planning_no] => 100-1
                    [pieces] => 0
                )
        )
I want array in below format
Array
        (
            [0] => stdClass Object
                (
                    [planning_no] => 100
                    [pieces] => 0
                )
            [1] => stdClass Object
                (
                    [planning_no] => 100
                    [pieces] => 148
                )
            [2] => stdClass Object
                (
                    [planning_no] => 100-1
                    [pieces] => 0
                )
            [3] => stdClass Object
                (
                    [planning_no] => 100-2
                    [pieces] => 0
                )
            [4] => stdClass Object
                (
                    [planning_no] => 100-3
                    [pieces] => 0
                )
            [5] => stdClass Object
                (
                    [planning_no] => 102
                    [pieces] => 0
                )
        )
 
    