Question

I’m trying to sort any array with array_multisort() and everything is working great. However, based on conditions in my script, I need to change the options.

What I have so far is this:

array_multisort(
    $sort1,
    SORT_ASC,
    $sort2,
    SORT_ASC,
    $sort3,
    SORT_ASC, 
    $arraytosort
);

I would like to write something that will allow a more flexible/dynamic payload of sorting data/rules. Something like this:

$dynamicSort = "$sort1,SORT_ASC,$sort2,SORT_ASC,$sort3,SORT_ASC,";

array_multisort(
    $dynamicSort, 
    $arraytosort
);

How can I feed an unknown number of parameters to array_multisort() and have it modify the $arraytosort array?

Answer 1

You could try to use call_user_func_array. But I’ve never tried it on a built-in function before. Here is an example:

$dynamicSort = "$sort1,SORT_ASC,$sort2,SORT_ASC,$sort3,SORT_ASC";
$param = array_merge(explode(",", $dynamicSort), array($arrayToSort))
call_user_func_array('array_multisort', $param)