使用PHP獲取JSON數組

Question

我有以下JSON字符串，我想要循環訪問「子」項並將其打印爲HTML選項，但出於某種原因，我無法完全控制它們。

之前只使用過JSON，所以它可能是某處的菜鳥錯誤。

{ 
    "1":{ 
     "question":"How happy are you with your car?", 
     "sub":[ 
     "Very Happy", 
     "Not So Happy", 
     "Unhappy", 
     "Very Unhappy" 
     ] 
    } 
} 

我有以下讓我回應問題價值，但我將如何循環通過每個'sub'數組？ （這裏只有永遠會是1個問題這是爲什麼我將它存儲在一個變量）

$questionAnswer = json_decode($data->question,true); 
foreach ($questionAnswer as $key => $value) { 
    $question = $value['question']; 
} 

Answer 1

加入現有的一個內部另一個循環：

$questionAnswer = json_decode($data->question,true); 
foreach ($questionAnswer as $key => $value) { 
    $question = $value['question']; 

    echo $question."<br>"; 
    // value['sub'] contains the array of 'subs', so you can loop through that the same way 
    foreach ($value['sub'] as $sub) { // since the key will be 0,1,2 you might not need it here, so I omitted it. 
     echo $sub."<br>"; 
    } 
} 

Answer 2

foreach ($questionAnswer as $key => $value) { 
    $question = $value['question']; 

    foreach ($value['sub'] as $answer) { 
     echo $answer; 
    } 
}