php - 一定数量的行后开始不同的计数 - php modulus

Question

我有一个出租车应用程序，其中的乘车时间被插入到表中。每第 n 次(例如 5 次)乘坐都是免费的。我需要的是，当用户乘坐超过 50 次时，每 3 次应该免费。在下面的代码中，我设法每 5 次进行一次，但当超过 50 次时，它开始从所有游乐设施中每 3 次计数一次，所有内容都混在一起了。是否可以每 5 次计数一次，直到 50 次，之后每 3 次计数一次？

    $i=$rows;
    if ($rows>50){
        if ($i != 0 && $i%3 == 0){
        echo "<p>This ride is free</p>";
        }
        elseif ($i%3 == 2){
        echo "<p>Next ride is free</p>";
        }
    $i--;
    break;
    }
    elseif ($rows<=50){
        if ($i != 0 && $i%5 == 0){
        echo "<p>This ride is free</p>";
        }
        elseif ($i%5 == 4){
        echo "<p>Next ride is free</p>";
        }
    $i--;
    break;
    }

Answer 1

我认为下面的内容就是您正在寻找的内容。我把 $i--; 和 break; 拿出来，因为我看不到它们的用途，除非这是在更大的循环内部，但我仍然不知道了解他们的目的。无论如何。

$i=$rows;
if ($rows>50){
    $i = $i - 50;
    if ($i != 0 && $i%3 == 0){
        echo "<p>This ride is free</p>";
    } else if ($i%3 == 2){
        echo "<p>Next ride is free</p>";
    }
} else if ($rows<=50){
    if ($i != 0 && $i%5 == 0){
        echo "<p>This ride is free</p>";
    } else if ($i%5 == 4){
        echo "<p>Next ride is free</p>";
    }
}

在 http://sandbox.onlinephpfunctions.com/ 上测试

for($rows=0;$rows<75;$rows++){
  $i=$rows;
  echo $rows;
  if ($rows>50){
      $i = $i - 50;
      if ($i != 0 && $i%3 == 0){
          echo ": This ride is free";
      } else if ($i%3 == 2){
          echo ": Next ride is free";
      }
  } else if ($rows<=50){
      if ($i != 0 && $i%5 == 0){
          echo ": This ride is free";
      } else if ($i%5 == 4){
          echo ": Next ride is free";
      }
  }
  echo "\n";

结果:

0
1
2
3
4: Next ride is free
5: This ride is free
6
7
8
9: Next ride is free
10: This ride is free
11
12
13
14: Next ride is free
15: This ride is free
16
17
18
19: Next ride is free
20: This ride is free
21
22
23
24: Next ride is free
25: This ride is free
26
27
28
29: Next ride is free
30: This ride is free
31
32
33
34: Next ride is free
35: This ride is free
36
37
38
39: Next ride is free
40: This ride is free
41
42
43
44: Next ride is free
45: This ride is free
46
47
48
49: Next ride is free
50: This ride is free
51
52: Next ride is free
53: This ride is free
54
55: Next ride is free
56: This ride is free
57
58: Next ride is free
59: This ride is free
60
61: Next ride is free
62: This ride is free
63
64: Next ride is free
65: This ride is free
66
67: Next ride is free
68: This ride is free
69
70: Next ride is free
71: This ride is free
72
73: Next ride is free
74: This ride is free