PHP 价格突破数量

Question

我有一个像这样的数组对象

"PriceBreaks": [
  {
    "Quantity": 1,
    "Price": "$12.10",
    "Currency": "USD"
  },
  {
    "Quantity": 5,
    "Price": "$11.76",
    "Currency": "USD"
  },
  {
   "Quantity": 10,
   "Price": "$11.42",
   "Currency": "USD"
  },
  {
    "Quantity": 25,
    "Price": "$10.75",
    "Currency": "USD"
  }
],

我想像上面的json那样根据数量计算价格。 我的预期输出是这样的

+ Quantity is 1 => price is $ 12.10
+ Quantity is 4 => price is 4 * $ 12.10
+ Quantity is 5 => price is 5 * $ 11.76
+ Quantity is 8 => price is 8 * $ 11.76

如有任何帮助，我们将不胜感激，并提前致谢

Answer 1

这是您可以用来获取灵感的另一种方法。详情请见评论。

<?php

// Raw JSON
$json = '[
  {
    "Quantity": 1,
    "Price": "$12.10",
    "Currency": "USD"
  },
  {
    "Quantity": 5,
    "Price": "$11.76",
    "Currency": "USD"
  },
  {
   "Quantity": 10,
   "Price": "$11.42",
   "Currency": "USD"
  },
  {
    "Quantity": 25,
    "Price": "$10.75",
    "Currency": "USD"
  }
]';

// Convert JSON to array using the quantity as the index.
$offers = [];
// TRUE to convert to associative array.
foreach (json_decode($json, TRUE) as $offer)
{
    // Let's get a float for the calculations instead of the string.
    $offer['Price'] = +substr($offer['Price'], 1);
    // Store as quantity => offer.
    $offers[$offer['Quantity']] = $offer;
}

// The number of items to be purchased.
$customerQuantity = 10;

// max(1, ...) will ensure that the key will never go below 1.
// floor($customerQuantity / 5) * 5 to get to the nearest boundary. This assumes that quantities are always a multiple of 5!
echo $offers[max(1, floor($customerQuantity / 5) * 5)]['Price'];

Answer 2

这里存储了您的计算数组，其中存储了数量及其总价格。由于您存储了带有货币符号的价格，因此在计算之前您需要删除该字符。

$json = '{
    "PriceBreaks": [{
        "Quantity": 1,
        "Price": "$12.10",
        "Currency": "USD"
    }, {
        "Quantity": 5,
        "Price": "$11.76",
        "Currency": "USD"
    }, {
        "Quantity": 10,
        "Price": "$11.42",
        "Currency": "USD"
    }, {
        "Quantity": 25,
        "Price": "$10.75",
        "Currency": "USD"
    }]
}';
  $data = json_decode( $json, true );
  $calculation = [];
  foreach ($data['PriceBreaks'] as $value) {
      $calculation [] = [
          'quantity' => $value['Quantity'],
          'total_price' => $value['Quantity'] * str_replace('$','', $value['Price'])
      ];
  }
  var_dump( $calculation );