Question

This is an output array pushed from mysql query

Array
(
    [0] => Array
        (
            [CategoryID] => 7
            [CategoryName] => Test it
            [Parent] => 2
            [Thumb] => 4
            [sort] => 0
            [MediaID] => 4
            [MediaTitle] => asd
            [MediaName] => 1349012691_4.jpg
            [MediaType] => image
            [MediaSize] => 369848
            [UploadTime] => 1349012691
        )

    [1] => Array
        (
            [CategoryID] => 8
            [CategoryName] => Test all
            [Parent] => 4
            [Thumb] => 5
            [sort] => 0
            [MediaID] => 5
            [MediaTitle] => asaas
            [MediaName] => 1349012728_9.jpg
            [MediaType] => image
            [MediaSize] => 416817
            [UploadTime] => 1349012728
        )

    [2] => Array
        (
            [CategoryID] => 4
            [CategoryName] => Test Image
            [Parent] => 0
            [Thumb] => 0
            [sort] => 2
            [MediaID] => 
            [MediaTitle] => 
            [MediaName] => 
            [MediaType] => 
            [MediaSize] => 
            [UploadTime] => 
        )

    [3] => Array
        (
            [CategoryID] => 2
            [CategoryName] => Test Sub
            [Parent] => 1
            [Thumb] => 0
            [sort] => 4
            [MediaID] => 
            [MediaTitle] => 
            [MediaName] => 
            [MediaType] => 
            [MediaSize] => 
            [UploadTime] => 
        )

    [4] => Array
        (
            [CategoryID] => 3
            [CategoryName] => Test Category
            [Parent] => 0
            [Thumb] => 0
            [sort] => 6
            [MediaID] => 
            [MediaTitle] => 
            [MediaName] => 
            [MediaType] => 
            [MediaSize] => 
            [UploadTime] => 
        )

    [5] => Array
        (
            [CategoryID] => 1
            [CategoryName] => Test Category
            [Parent] => 0
            [Thumb] => 0
            [sort] => 8
            [MediaID] => 
            [MediaTitle] => 
            [MediaName] => 
            [MediaType] => 
            [MediaSize] => 
            [UploadTime] => 
        )

    [6] => Array
        (
            [CategoryID] => 5
            [CategoryName] => Test Category
            [Parent] => 0
            [Thumb] => 0
            [sort] => 10
            [MediaID] => 
            [MediaTitle] => 
            [MediaName] => 
            [MediaType] => 
            [MediaSize] => 
            [UploadTime] => 
        )

    [7] => Array
        (
            [CategoryID] => 6
            [CategoryName] => Test Remove
            [Parent] => 0
            [Thumb] => 0
            [sort] => 12
            [MediaID] => 
            [MediaTitle] => 
            [MediaName] => 
            [MediaType] => 
            [MediaSize] => 
            [UploadTime] => 
        )

)

I need to sort this array so it show Parents Category First then child categories.

I need the output something like

Array
(

    [2] => Array
        (
            [CategoryID] => 4
            [CategoryName] => Test Image
            [Parent] => 0
            [Thumb] => 0
            [sort] => 2
            [MediaID] => 
            [MediaTitle] => 
            [MediaName] => 
            [MediaType] => 
            [MediaSize] => 
            [UploadTime] => 
        )
        //sub category
            [1] => Array
            (
                [CategoryID] => 8
                [CategoryName] => Test all
                [Parent] => 4
                [Thumb] => 5
                [sort] => 0
                [MediaID] => 5
                [MediaTitle] => asaas
                [MediaName] => 1349012728_9.jpg
                [MediaType] => image
                [MediaSize] => 416817
                [UploadTime] => 1349012728
            )

    [3] => Array
        (
            [CategoryID] => 2
            [CategoryName] => Test Sub
            [Parent] => 1
            [Thumb] => 0
            [sort] => 4
            [MediaID] => 
            [MediaTitle] => 
            [MediaName] => 
            [MediaType] => 
            [MediaSize] => 
            [UploadTime] => 
        )
                //sub category
                [0] => Array
                (
                    [CategoryID] => 7
                    [CategoryName] => Test it
                    [Parent] => 2
                    [Thumb] => 4
                    [sort] => 0
                    [MediaID] => 4
                    [MediaTitle] => asd
                    [MediaName] => 1349012691_4.jpg
                    [MediaType] => image
                    [MediaSize] => 369848
                    [UploadTime] => 1349012691
                )

    [4] => Array
        (
            [CategoryID] => 3
            [CategoryName] => Test Category
            [Parent] => 0
            [Thumb] => 0
            [sort] => 6
            [MediaID] => 
            [MediaTitle] => 
            [MediaName] => 
            [MediaType] => 
            [MediaSize] => 
            [UploadTime] => 
        )

    [5] => Array
        (
            [CategoryID] => 1
            [CategoryName] => Test Category
            [Parent] => 0
            [Thumb] => 0
            [sort] => 8
            [MediaID] => 
            [MediaTitle] => 
            [MediaName] => 
            [MediaType] => 
            [MediaSize] => 
            [UploadTime] => 
        )

    [6] => Array
        (
            [CategoryID] => 5
            [CategoryName] => Test Category
            [Parent] => 0
            [Thumb] => 0
            [sort] => 10
            [MediaID] => 
            [MediaTitle] => 
            [MediaName] => 
            [MediaType] => 
            [MediaSize] => 
            [UploadTime] => 
        )

    [7] => Array
        (
            [CategoryID] => 6
            [CategoryName] => Test Remove
            [Parent] => 0
            [Thumb] => 0
            [sort] => 12
            [MediaID] => 
            [MediaTitle] => 
            [MediaName] => 
            [MediaType] => 
            [MediaSize] => 
            [UploadTime] => 
        )

)

Can I do this with PHP?

Answer 1

You can try

# Short Version of your Array
$oldList = Array(
    "0" => Array("CategoryID" => 7,"CategoryName" => "Test it","Parent" => 2),
    "1" => Array("CategoryID" => 8,"CategoryName" => "Test all","Parent" => 4),
    "2" => Array("CategoryID" => 4,"CategoryName" => "Test Image","Parent" => 0),
    "3" => Array("CategoryID" => 2,"CategoryName" => "Test Sub","Parent" => 1),
    "4" => Array("CategoryID" => 3,"CategoryName" => "Test Category","Parent" => 0),
    "5" => Array("CategoryID" => 1,"CategoryName" => "Test Category","Parent" => 0),
    "6" => Array("CategoryID" => 5,"CategoryName" => "Test Category","Parent" => 0),
    "7" => Array("CategoryID" => 6,"CategoryName" => "Test Remove","Parent" => 0)
);

echo "<pre>";
print_r(__group($oldList));

Function used

function __group($oldList)
{
    # Get Category Position
    $category = array_map(function($item) { return $item['CategoryID'];}  ,$oldList); 

    #Get Only Parent List and add to new list
    $newList = array_filter($oldList , function($item) {  return $item['Parent']  == 0 ; } );

    foreach($oldList as $key => $value)
    {
        if($value['Parent'] != 0) {
            # Mapt Chiled to parent using Parent ID & Category ID 
            $newList[array_search($value['Parent'],$category)]['child'][] = $value;
        }
    }
    return $newList ;
}

Output

Array
(
    [2] => Array
        (
            [CategoryID] => 4
            [CategoryName] => Test Image
            [Parent] => 0
            [child] => Array
                (
                    [0] => Array
                        (
                            [CategoryID] => 8
                            [CategoryName] => Test all
                            [Parent] => 4
                        )

                )

        )

    [4] => Array
        (
            [CategoryID] => 3
            [CategoryName] => Test Category
            [Parent] => 0
        )

    [5] => Array
        (
            [CategoryID] => 1
            [CategoryName] => Test Category
            [Parent] => 0
            [child] => Array
                (
                    [0] => Array
                        (
                            [CategoryID] => 2
                            [CategoryName] => Test Sub
                            [Parent] => 1
                        )

                )

        )

    [6] => Array
        (
            [CategoryID] => 5
            [CategoryName] => Test Category
            [Parent] => 0
        )

    [7] => Array
        (
            [CategoryID] => 6
            [CategoryName] => Test Remove
            [Parent] => 0
        )

    [3] => Array
        (
            [child] => Array
                (
                    [0] => Array
                        (
                            [CategoryID] => 7
                            [CategoryName] => Test it
                            [Parent] => 2
                        )

                )

        )

)