PHP sorting

[snaps11]

Hello.  I have a multi dimensional array that needs to be sorted. Array  top25 [index][product id][number_of_purchases].  The index will contain a unique number for each product id. First product will be 1, second product will be 2, etc.  The product id will be a id number like 34324ac9a89.  The number of purchases will be how many times the item has been purchased. 

 

- End result:  I want to print the 25 most purchased products in this format.

 

product id - number of purchases

 

a39acz  -  503

a8cz9c  - 480

zc8ac  -  392

 

 

How do I do this?  Thanks

[gizmola]

Turn the index into a single dimension array that is keyed by the product id, with the number of purchases value.  You do not need the empty index, nor do you want it.  If when you are done with your sort, you want to recreate that you can do that easily enough by foreach() through the array to create a new one, where you can put in your ordinal value if you prefer, or just stay with the zero based index.  Hopefully this simple example illustrates, although I obviously left out a necessary for () loop to get the top 25 from the array by purchase.

 

        $r['a8cz9c'] = 480;
        $r['a39acz'] = 503;
        $r['zc8ac'] = 392;
        $r['fafefaef'] = 822;
        print_r($r);

        arsort($r, SORT_NUMERIC);
        print_r($r);

 

result:

 

Array
(
    [a8cz9c] => 480
    [a39acz] => 503
    [zc8ac] => 392
    [fafefaef] => 822
)
Array
(
    [fafefaef] => 822
    [a39acz] => 503
    [a8cz9c] => 480
    [zc8ac] => 392
)