Question

我有这个PHP循环

$two_related_total = 0;
$three_related_total = 0;
$four_related_total = 0;
$five_related_total = 0;
$all_values = getRelatedProducts(91)
$arr = array(2, 3, 4, 5);
 foreach ($arr as $discount_quantity) {

  //do something in here here to get the discounted_price or the price
}

以下是$ getRelatedProducts中的数据。基本上我需要获得每个阵列的折扣总额

例如，对于值2，我需要将$ two_related_total的值设置为729.0000等等......或者如果有更好的方法来获取这四个值，请帮助我....谢谢预先

[0] => Array
         (
             [product_id] => 180
             [price] => 749.0000
             [discounted_price] => 729.0000
             [cost] => 420.0000
             [quantity] => 2
         )

     [1] => Array
         (
             [product_id] => 180
             [price] => 749.0000
             [discounted_price] => 545.0000
             [cost] => 420.0000
             [quantity] => 3
         )

     [2] => Array
         (
             [product_id] => 180
             [price] => 749.0000
             [discounted_price] => 545.0000
             [cost] => 420.0000
             [quantity] => 4
         )

     [3] => Array
         (
             [product_id] => 180
             [price] => 749.0000
             [discounted_price] => 545.0000
             [cost] => 420.0000
             [quantity] => 5
         )

 )

Answer 1

您可以将相关的总计切换为数组：

$related_totals=array();
$all_values = getRelatedProducts(91)
$arr = array(2, 3, 4, 5);
foreach ($arr as $discount_quantity) {
   $related_totals[$discount_quantity]=$all_values[$discount_quantity]['price'];
   //do something in here here to get the discounted_price or the price
}

我并不是真的理解你的问题，正如其他人指出的那样，没有729的价值，（虽然有749）。但是这给了你这个想法。

Answer 2

我认为这就是你想要的：

$discounts = array();

foreach($product_array as $key => $product) {
    $discounts[$key] = $product['discounted_price'];
}

echo $discounts[2]; // $545.00

使用数组来保存折扣比尝试为每个变量设置单个变量要容易得多。否则，随着产品阵列的增长，你最终会得到$five_hundred_bajillion_60_kajillion_and_3_discounted_total。

Answer 3

我认为这是你想要的，但你的问题真的不清楚。

$arr = array(2, 3, 4, 5);
$totals = array(2=>0, 3=>0, 4=>0, 5=>0);
foreach ( $all_values as $product ){
  if (in_array($product['quantity'], $arr)) {
    $totals[$products['quantity']] += $product['discounted_price'];
  }
}

对于前两行，您也可以这样做：

$arr = range(2,5);
$totals = array_fill_keys($arr, 0);

我如何从这个php循环中提取正确的值

3 个答案: