我将如何从此php循环中提取正确的值

问题描述

| 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
}

这是$ 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，依此类推...或者如果有更好的方法来获取这四个值，请提前帮助我....谢谢

[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
         )

 )

    

解决方法

您可以将相关总数切换到数组：

$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
}

我并没有真正理解您的问题，正如其他人指出的那样，它没有729的价值（尽管有749）。但这给了你这个主意。     ,我想这就是你想要的：

$discounts = array();

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

echo $discounts[2]; // $545.00 

使用数组保存折扣要比尝试为每个变量设置单个变量容易得多。否则，随着产品系列的增加，您最终将以

$five_hundred_bajillion_60_kajillion_and_3_discounted_total

结帐。     ,我认为这是您想要的，但您的问题确实不清楚。

$arr = array(2,5);
$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，您可以选择执行以下操作：

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