PHP - 数组到具有特定索引/键的json

Question

我收到了一个数组，并希望通过在PHP中使用带有特定索引/键的json_encode将其转换为json。数组结果：

{"StatusCode": "2800", 
"card": { 
"studentcard": { 
"1000": [ 
{ 
"Name": "Jerome", 
"CardNumber": "512314512312", 
"CardExpiry": "2017-03-24", 
"CardType": "Library", 
}, 
{ 
"Name": "Jerome", 
"CardNumber": "512314512312-b", 
"CardExpiry": "2017-10-22", 
"CardType": "IT", 
}], 
"1001": [ 
{ 
"Name": "Jason", 
"CardNumber": "512314512313", 
"CardExpiry": "2017-10-22", 
"CardType": "Library", 
}] 
} 

预期结果在JSON

[ 
{ 
    "Name": "Jerome", 
    "CardNumber": "512314512312", 
    "CardExpiry": "2017-03-24", 
    "CardType": "Library" 
}, 
{ 
    "Name": "Jerome", 
    "CardNumber": "512314512312-b", 
    "CardExpiry": "2017-10-22", 
    "CardType": "IT" 
}, 
{ 
    "Name": "Jason", 
    "CardNumber": "512314512313", 
    "CardExpiry": "2017-10-22", 
    "CardType": "Library" 
} 
] 

如何删除的StatusCode，卡，studentcard，1000并将其编码为JSON中预期的结果？

Answer 1

可以弄平该阵列call_user_func_array('array_merge', ...)：

$obj = json_decode($json, true); 
$result = call_user_func_array('array_merge', $obj["card"]["studentcard"]); 
$json = json_encode($result, JSON_PRETTY_PRINT); 

看到它在eval.in或repl.it上运行。

请注意，在JSON中，不能在对象的最后一个属性（即刚好在大括号之前）后留有逗号。此外，你有两个闭合的括号丢失。

Answer 2

使用json_decode和array_merge功能的有效 JSON字符串的溶液：

$json_str = '{ 
    "StatusCode": "2800", 
    "card": { 
     "studentcard": { 
      "1000": [{ 
       "Name": "Jerome", 
       "CardNumber": "512314512312", 
       "CardExpiry": "2017-03-24", 
       "CardType": "Library" 
      }, { 
       "Name": "Jerome", 
       "CardNumber": "512314512312-b", 
       "CardExpiry": "2017-10-22", 
       "CardType": "IT" 
      }], 
      "1001": [{ 
       "Name": "Jason", 
       "CardNumber": "512314512313", 
       "CardExpiry": "2017-10-22", 
       "CardType": "Library" 
      }] 
     } 
    } 
}'; 

$data = json_decode($json_str, true); 
$data = array_merge($data["card"]["studentcard"]["1000"], $data["card"]["studentcard"]["1001"]); 
$json = json_encode($data, JSON_PRETTY_PRINT); 

echo $json; 

输出：

[ 
    { 
     "Name": "Jerome", 
     "CardNumber": "512314512312", 
     "CardExpiry": "2017-03-24", 
     "CardType": "Library" 
    }, 
    { 
     "Name": "Jerome", 
     "CardNumber": "512314512312-b", 
     "CardExpiry": "2017-10-22", 
     "CardType": "IT" 
    }, 
    { 
     "Name": "Jason", 
     "CardNumber": "512314512313", 
     "CardExpiry": "2017-10-22", 
     "CardType": "Library" 
    } 
]