php array remove after index

 $myArrayInit = [1 => 'red', 30 => 'orange', 25 => 'velvet', 45 => 'pink']; //<-- Your actual array
 $offsetKey = 25; //<---  offset seng mbok butohke

    //Lets do the code....
    $n = array_keys($myArrayInit); //<---- Grab all the keys of your actual array and put in another array
    $count = array_search($offsetKey, $n); //<--- Returns the position of the offset from this array using search
    $new_arr = array_slice($myArrayInit, 0, $count + 1, true);//<--- Slice it with the 0 index as start and position+1 as the length parameter.
    print_r($new_arr);

// hasile iki > 
/*
Array
(
    [1] => red
    [30] => orange
    [25] => velvet
)
*/