php数组深层次的数组[关闭]

Question

Word-Array
     Words1-array
     Words1 meaning
        -Words1 Synonyms-
             -Synonym1,Synonym2.etc(Array)
        -Words1 Antonyms
             -Antonym1,Antonym2.etc(Array)
    Words2-array
     Words2 meaning
        -Words2 Synonyms-
             -Synonym1,Synonym2.etc(Array)
        -Words2 Antonyms
             -Antonym1,Antonym2.etc(Array)

$ar1 = array(array("Words"=>array("word","meaning","synonyms"=>array(),"antonyms"=array()))));

我试图创建用于生成 JSON 结果的 Php 数组数组，但始终未能实现这一点

Answer 1

这样的？

$words = array(
    'word1' => array(
        'meaning' => 'word1 meaning',
        'synonyms' => array(
            'word1 synonym1',
            'word1 synonym2'
        ),
        'antonyms' => array(
            'word1 antonym1',
            'word1 antonym2'
        )
    ),
    'word2' => array(
        'meaning' => 'word2 meaning',
        'synonyms' => array(
            'word2 synonym1',
            'word2 synonym2'
        ),
        'antonyms' => array(
            'word2 antonym1',
            'word2 antonym2'
        )
    )
);

如果这是您正在寻找的，那么从您可用的任何数据源动态创建这样一个数组非常简单。由于您没有在问题中提供该信息，假设您有一个结构如下的 MySQL 数据库：

                 +----------+
+---------+      | synonyms |
| words   |      +----------+
+---------+      | id       |
| id      | -+-> | word_id  |
| word    |  |   | synonym  |
| meaning |  |   +----------+
+---------+  |
             |   +----------+
             |   | antonyms |
             |   +----------+
             |   | id       |
             \-> | word_id  |
                 | antonym  |
                 +----------+

这当然非常简单，使用这种配置，synonyms 和 antonyms 表中会有很多重复项。

您可以使用标准的PDO 或mysqli 功能从数据库中检索信息。由于不清楚您的数据源是否实际上是 MySQL 数据库，我将假设 mysqli 并在此示例中使用非常基本的查询。毕竟，这里的目的不是教你如何安全地与你的数据库通信，而是如何构建一个你可以通过json_encode() 传递的多维数组。这是您可以做到这一点的一种方法：

$words = array();

$mysqli = new mysqli(...);

// retrieve the list of words from the `words` table
$words_res = $mysqli->query('SELECT * FROM `words`');
while ($word = $words_res->fetch_assoc()) {
    // build the initial sub-array for this word, we'll be adding
    // it to $words after we fill it
    $word_array = array(
        'meaning' => $word['meaning'],
        'synonyms' => array(),
        'antonyms' => array()
    );

    // retrieve all synonyms for this word
    $synonyms_res = $mysqli->query('SELECT * FROM `synonyms` WHERE `word_id` = ' . $word['id']);
    while ($synonym = $synonyms_res->fetch_assoc()) {
        // add this synonym to our $word_array
        $word_array['synonyms'][] = $synonym['synonym'];
    }

    // retrieve all antonyms for this word
    $antonyms_res = $mysqli->query('SELECT * FROM `antonyms` WHERE `word_id` = ' . $word['id']);
    while ($antonym = $antonyms_res->fetch_assoc()) {
        // add this antonym to our $word_array
        $word_array['antonyms'][] = $antonym['antonym'];
    }

    // now that $word_array is filled, we can add it to $words
    $words[$word['word']] = $word_array;
}

// since you say you want a JSON result, convert the array to
// JSON and output it
echo json_encode($words);