php if statement html option value

Answer 1

I think the read-friendly version would be:

switch($option){
    case 'Newest':
        runNewestFunction();
    break;
    case 'Best Sellers':
        runBestSellersFunction();
    break;
    case 'Alphabetical':
        runAlphabeticalFunction();
    break;
    default:
        runValidationRequest();
}

also, please add the name attribute