Question

是否有一种快速的方法来根据天数来减少租金？

例如：

If I rent a car for 1day,  the cost is 100$
If I rent a car for 2days, the cost is 100$ + 70$ = 170$
If I rent a car for 3days, the cost is 100$ + 70$ + 50$ = 220$
If I rent a car for 4days, the cost is 100$ + 70$ + 50$ + 50$ = 270$
If I rent a car for 5days, the cost is 100$ + 70$ + 50$ + 50$ + 50$ = 320$

因此，我需要一种快速的方法来根据天数获取总费用。例如：

function getcost(days){
   ...
   return $cost;
}

echo getcost(1); // it show 100$
echo getcost(3); // it show 220$
// and so on...

Answer 1

假设从第三天开始，所有连续天的费用为50美元：

function getcost(int $days) {
  return ($days > 1) ? (($days - 2) * 50 + 170) : (($days == 1) ? 100 : 0);
}

Answer 2

function getcost(days){
    $cost=0;
    for($idx=1;$idx<=$days;$idx++)
     {
       switch($idx)
       {
         case 1:
                 $cost+=100;
                 break;
         case 2:
                 $cost+=70;
                 break;
         default:
                 $cost+=50;
                 break;

       }
     }
  return $cost;
 }

Answer 3

$price = $days * 50 + ($days > 1 ? 70 : 20);

如果需要，可以将其放入函数中。

Answer 4

您可以尝试这样-

<?php
function getcost($days){
   $array=['base' => 100, 'for_2nd' => 70, 'after_2nd' => 50];       
   if($days==1){
       $cost = $array['base'] * $days;
   }else if($days>=2){
       $cost = $array['base']  + ($days == 2 ? $array['for_2nd'] : $array['for_2nd'] + ($days - 2) * $array['after_2nd']); 
   }
   return $cost.'$';
}

echo getcost(1); // it show 100$
echo getcost(2); // it show 170$
echo getcost(3); // it show 220$
echo getcost(4); // it show 270$
echo getcost(5); // it show 320$
?>

演示： https://3v4l.org/h9tF5

Answer 5

如果您的日费率是基于天数的，那么为了让您拥有动态费率（也许是不同类型的汽车等），那么最好将某种形式的数组传递给函数。然后，该函数会使用它并添加直到价格用完的天数，然后根据最后的价格添加剩余的天数...

// Cost for each day
$costs = [100, 70, 50];

function getcost( $costs, $days){
    $totalCost = 0;
    foreach ( $costs as $dayCost )  {
        // Add each cost
        $totalCost += $dayCost;
        // Decrement number of days left and exit if reached 0
        if ( --$days == 0 ) {
            break;
        }
    }
    // If remaining days - add last day cost * number of days
    if ($days > 0 ) {
        $totalCost += ($dayCost*$days);
    }
    return $totalCost;
}

echo getcost($costs, 1); // it show 100$
echo getcost($costs, 3); // it show 220$
echo getcost($costs, 5); // it show 320$

如何根据天数获得减少的租金

5 个答案: