Ndingawabala njani amaxabiso afanayo kuludwe ndize ndiligcine kuguqulelo?

$items = explode(',',$product); // values is 4,2,4,2,2,4

$unique_items=array_unique($items); // gives me 4,2

Yeyiphi ikhowudi emele ukundinika 4 = 3, 2 =