Question

我有从网络服务生成的数组。

Array ( 
    [TPA_Extensions] => Array (
        [TPARoomDetail] => Array ( 
            [GuestCounts] => Array ( 
                [GuestCount] => Array ( 
                        [!AgeQualifyingCode] => 10 
                        [!Count] => 1
                ) 
            ) 
            [!Occupancy] => Single 
            [!OccupancyCode] => SGL 
        ) 
    ) 
    [!IsRoom] => true 
    [!Quantity] => 1 
    [!RoomType] => Palace Gold Club Room 
    [!RoomTypeCode] => PGC 
)

我的foreach循环如下

foreach ($roomType["TPA_Extensions"]["TPARoomDetail"]["GuestCounts"]["GuestCount"] as $guestcount) {

echo "guest count1->";print_r($guestcount);
echo "guest count2->";  print_r($roomType["TPA_Extensions"]["TPARoomDetail"]["GuestCounts"]["GuestCount"]);
}

我得到的输出是客人

count1->10 guest count2->Array ( [!AgeQualifyingCode] => 10 [!Count] => 1 )

来宾count1应该是一个数组

Array ( [!AgeQualifyingCode] => 10 [!Count] => 1 )  but it comes as an int 10 ..

为什么会这样......？

Answer 1

您的输出正确无误， $guestcount 的数字为“10”，

其中 $roomType["TPA_Extensions"]["TPARoomDetail"]["GuestCounts"]["GuestCount"] 拿一个阵列。

这是你的循环：

foreach ($roomType["TPA_Extensions"]["TPARoomDetail"]["GuestCounts"]["GuestCount"] as $guestcount) {

  echo "guest count1->";print_r($guestcount);
  echo "guest count2->";  print_r($roomType["TPA_Extensions"]["TPARoomDetail"]["GuestCounts"]["GuestCount"]);
}

这个循环将运行2次，因为这是 GuestCount 数组中的子项数。它将是'10'，然后是'1'，正好反映了阵列的结构：

[!AgeQualifyingCode] => 10 
[!Count] => 1

Answer 2

由于第一个索引保存整数值而第二个索引保存数组，因此代码没有错误。但是，访问数组值的方法非常复杂，并且看起来不太好。您可以按照以下更有效的方式访问数组值和键。

1）创建一个方法，该方法获取您要访问的数组的路径

例如，根据您的代码，如果我想访问 AgeQualifyingCode 键，那么我必须编写$ roomType [＆＃34; TPA_Extensions＆＃34;] [＆＃34; TPARoomDetail＆＃34;] [＆＃34; GuestCounts＆＃34;] [＆＃34; GuestCount＆＃34;] [＆＃34; AgeQualifyingCode＆＃34]。

这看起来不太好，如果您只需要传递要访问该值的密钥路径，那就太棒了。

例如：/ TPA_Extensions / TPARoomDetail / GuestCounts / GuestCount / AgeQualifyingCode

您只需定义一个获取键路径的函数，并返回该键的值

<?php

    function path($path=null){
        if($path){
            $array = $theNameOfOriginalArray
            $path  = explode('/',$path);

            foreach($path as $sub){
                if(isset($array[$sub])){
                    $array = $array[$sub];
                }
            }

            return $array;
        }
    }

    $value = path('TPA_Extensions/TPARoomDetail/GuestCounts/GuestCount/AgeQualifyingCode');
    //will return 10
?>

foreach没有为web服务正确循环

2 个答案: