开票算法问题 排列组合算法求助（类似青蛙跳台阶 ，分蛋糕算法）

这个不需要什么算法的吧，只要大于可开的就递归新开。

三行代码就搞定了吧！

• 代码

  <?php
  $price = 25.5;
  $number = 20000;
  $max = 115000;
  $num = floor($max / $price);
  $data = [];
  while ($number > 0) {
    $tmpNumber = $number >= $num ? $num : $number;
    $data[] = [
        'price' => $price,
        'number' => $tmpNumber,
        'total' => $tmpNumber * $price
    ];
    $number -= $tmpNumber;
  }
  print_r($data);

• 结果

  Array
  (
    [0] => Array
        (
            [price] => 25.5
            [number] => 4509
            [total] => 114979.5
        )
  
    [1] => Array
        (
            [price] => 25.5
            [number] => 4509
            [total] => 114979.5
        )
  
    [2] => Array
        (
            [price] => 25.5
            [number] => 4509
            [total] => 114979.5
        )
  
    [3] => Array
        (
            [price] => 25.5
            [number] => 4509
            [total] => 114979.5
        )
  
    [4] => Array
        (
            [price] => 25.5
            [number] => 1964
            [total] => 50082
        )
  )