我需要帮助使用 php 循环遍历 JSON 文件

Question

我有this JSON file（缩短版），需要为每个问题循环遍历它#并将问题详细信息添加到 MySQL 数据库。每个测验有 10 个问题。每个测验由一个 URL、标题、图像和问题（数组）组成。每个测验有 10 个问题和 4 个答案选项。

我正在寻找一个起点，这样我就可以开始循环并回答问题。任何帮助将不胜感激。谢谢！

手码数据提取 - 我想循环这个。

// this will be associated with every question in a quiz.
    $url = $json['rows'][0]['URL'];
    $Title = $json['rows'][0]['Title'];
    $Questions = $json['rows'][0]['Questions'];
    $Image = $json['rows'][0]['Image'];
//  I need these to loop thorugh for Q1, Q2, Q3, etc..... for every Q# in row0
    $Q1Text = $json['rows'][0]['Questions']['Question1']['Question Text'];
    $Q1MediaURL = $json['rows'][0]['Questions']['Question1']['Question Media']['Media url'];
    $Q1MediaType = $json['rows'][0]['Questions']['Question1']['Question Media']['Media Type'];
    $Q1Answer1 = $json['rows'][0]['Questions']['Question1']['Answers']['Answer1']['Answer'];
    $Q1Answer1Value = $json['rows'][0]['Questions']['Question1']['Answers']['Answer1']['Value'];
    $Q1Answer2 = $json['rows'][0]['Questions']['Question1']['Answers']['Answer2']['Answer'];
    $Q1Answer2Value = $json['rows'][0]['Questions']['Question1']['Answers']['Answer2']['Value'];
    $Q1Answer3 = $json['rows'][0]['Questions']['Question1']['Answers']['Answer3']['Answer'];
    $Q1Answer3Value = $json['rows'][0]['Questions']['Question1']['Answers']['Answer3']['Value'];
    $Q1Answer4 = $json['rows'][0]['Questions']['Question1']['Answers']['Answer4']['Answer'];
    $Q1Answer4Value = $json['rows'][0]['Questions']['Question1']['Answers']['Answer4']['Value'];

    $Q2Text = $json['rows'][0]['Questions']['Question2']['Question Text'];
    $Q2MediaURL = $json['rows'][0]['Questions']['Question2']['Question Media']['Media url'];
    $Q2MediaType = $json['rows'][0]['Questions']['Question2']['Question Media']['Media Type'];
    $Q2Answer1 = $json['rows'][0]['Questions']['Question2']['Answers']['Answer1']['Answer'];
    $Q2Answer1Value = $json['rows'][0]['Questions']['Question2']['Answers']['Answer1']['Value'];
    $Q2Answer2 = $json['rows'][0]['Questions']['Question2']['Answers']['Answer2']['Answer'];
    $Q2Answer2Value = $json['rows'][0]['Questions']['Question2']['Answers']['Answer2']['Value'];
    $Q2Answer3 = $json['rows'][0]['Questions']['Question2']['Answers']['Answer3']['Answer'];
    $Q2Answer3Value = $json['rows'][0]['Questions']['Question2']['Answers']['Answer3']['Value'];
    $Q2Answer4 = $json['rows'][0]['Questions']['Question2']['Answers']['Answer4']['Answer'];
    $Q2Answer4Value = $json['rows'][0]['Questions']['Question2']['Answers']['Answer4']['Value'];

    $Q3Text = $json['rows'][0]['Questions']['Question3']['Question Text'];
    $Q3MediaURL = $json['rows'][0]['Questions']['Question3']['Question Media']['Media url'];
    $Q3MediaType = $json['rows'][0]['Questions']['Question3']['Question Media']['Media Type'];
    $Q3Answer1 = $json['rows'][0]['Questions']['Question3']['Answers']['Answer1']['Answer'];
    $Q3Answer1Value = $json['rows'][0]['Questions']['Question3']['Answers']['Answer1']['Value'];
    $Q3Answer2 = $json['rows'][0]['Questions']['Question3']['Answers']['Answer2']['Answer'];
    $Q3Answer2Value = $json['rows'][0]['Questions']['Question3']['Answers']['Answer2']['Value'];
    $Q3Answer3 = $json['rows'][0]['Questions']['Question3']['Answers']['Answer3']['Answer'];
    $Q3Answer3Value = $json['rows'][0]['Questions']['Question3']['Answers']['Answer3']['Value'];
    $Q3Answer4 = $json['rows'][0]['Questions']['Question3']['Answers']['Answer4']['Answer'];
    $Q3Answer4Value = $json['rows'][0]['Questions']['Question3']['Answers']['Answer4']['Value'];

更新：这是我最终得到的工作代码。感谢@Lou 的帮助！

foreach($json['rows'] as $row){ // This will loop trough every rows in your array.
    foreach($row['Questions'] as $question){ //This will loop trough all the questions of the current row.
        echo ''.print_r($question).'<br>'; //You can access the array of your question here. using $question. For now it will just print it's content.

        echo "<strong>Quiz URL:</strong> " . $row["URL"]. "<br>";
        echo "<strong>Quiz Title:</strong> " . $row["Title"]. "<br>";
        echo "<strong>Quiz Image:</strong> " . $row["Image"]. "<br><br><br>";


        echo "<strong>Question Text:</strong> " . $question['Question Text']. "<br>";
        echo "<strong>Media URL:</strong> " . $question['Question Media']['Media url']. "<br>";
        echo "<strong>Media Type:</strong> " . $question['Question Media']['Media Type']. "<br>";
        echo "<strong>Answer1:</strong> " . $question['Answers']['Answer1']['Answer'] . " | " . $question['Answers']['Answer1']['Value'] . "<br>";
        echo "<strong>Answer2:</strong> " . $question['Answers']['Answer2']['Answer'] . " | " . $question['Answers']['Answer2']['Value'] . "<br>";
        echo "<strong>Answer3:</strong> " . $question['Answers']['Answer3']['Answer'] . " | " . $question['Answers']['Answer3']['Value'] . "<br>";
        echo "<strong>Answer4:</strong> " . $question['Answers']['Answer4']['Answer'] . " | " . $question['Answers']['Answer4']['Value'] . "<br>";


        echo "<br>";
    }
} 

Answer 1

因此，通过查看您当前的代码，我假设您已经将 json 解码为数组。

现在，如果您想在该数组中循环。您可能想要使用 foreach 循环。如果对您有帮助，请参阅下面的 sn-p：

foreach($json['rows'] as $row){ // This will loop trough every rows in your array.
    foreach($row['Questions'] as $question){ //This will loop trough all the questions of the current row.
        echo '<pre>'.print_r($question).'</pre><br><br>'; //You can access the array of your question here. using $question. For now it will just print it's content.
    }
}

如果您需要进一步的帮助，请告诉我。