How can PHP developers incorporate additional constraints, such as limiting the number of servers used, to further refine the cost-effective server combination algorithm?

To incorporate additional constraints like limiting the number of servers used in the cost-effective server combination algorithm, PHP developers can modify the algorithm to consider this constraint when selecting the optimal server combination. This can be achieved by adding a condition to check the number of servers used and ensuring it does not exceed the specified limit. If the limit is reached, the algorithm should stop adding more servers to the combination.

function findCostEffectiveServerCombination($servers, $limit) {
    $selectedServers = [];
    $totalCost = 0;
    
    foreach ($servers as $server) {
        if (count($selectedServers) < $limit) {
            $selectedServers[] = $server;
            $totalCost += $server->cost;
        } else {
            break;
        }
    }
    
    return ['servers' => $selectedServers, 'totalCost' => $totalCost];
}