將數組插入數據庫

Question

我使用此代碼將問題與選項一起分組。

<?php 

$entries = preg_split('/(?=[a-z\d]+\.(?!\d))/', $str, -1, PREG_SPLIT_NO_EMPTY); 

    $questions = array(); 
    $currentQuestion = null; 
    $id = 0; 

    foreach($entries as $entry) { 
    if(is_numeric(substr($entry, 0, 1)) === true) { 
     $currentQuestion = $entry; 
     $questions[$entry] = array(); 
     $id++; 
     // echo "INSERT INTO question (id, q_name) VALUES ($id, $currentQuestion)"."<br>"; 
     // mysqli_query($con, "INSERT INTO question (id, q_name) VALUES (NULL, '$currentQuestion')"); 
     continue; 

    } 

    // mysqli_query($con, "INSERT INTO answers (id, choices, question, correct) VALUES (NULL, 'choices', $id , 0);"); 
    // echo "INSERT INTO answers (id, choices, question, correct) VALUES (NULL, 'choices', $id , 'stuff')"."<br>"; 
    $questions[$currentQuestion][] = $entry; 
    } 

這是數組的結果。

Array 
(
    [1. What is love?] => Array 
     (
      [0] => a. Haddaway 

      [1] => b. Haxxaway 

      [2] => c. Hassaway 

      [3] => d. Hannaway 

     ) 

    [2. What is love? ] => Array 
     (
      [0] => a. Haddaway 

      [1] => b. Haxxaway 

      [2] => c. Hassaway 

      [3] => d. Hannaway 

     ) 

    [3. What is love 1.1? ] => Array 
     (
      [0] => a. Haddaway 

      [1] => b. Haxxaway 

      [2] => c. Hassaway 

      [3] => d. Hannaway 

     ) 

    [4. What is love? ] => Array 
     (
      [0] => a. Haddaway 

      [1] => b. Haxxaway 

      [2] => c. Hassaway 

      [3] => d. Hannaway 
     ) 

) 

，這是我的數據庫結構：表answersquestion列是從questions表的主鍵，這將決定哪些問題選擇屬於...

questions 
+-------+--------------------------+ 
| id | q_name     | 
+-------+--------------------------+ 
| 1 | 1.) What is foo?  | 
| 2 | 2.) What is foo?  | 
+-------+--------------------------+ 

answers 
+-------+-------------+-----------------------+ 
| id | choices  | question | correct | 
+-------+-------------+-----------------------+ 
| 1 | a. foo1 | 1   | 0  | 
| 2 | b. foo2 | 1   | 0  | 
| 3 | c. foo3 | 1   | 1  | 
| 4 | a. foo3 | 2   | 0  | 
| 5 | b. foo2 | 2   | 1  | 
| 6 | c. foo1 | 2   | 0  | 
+-------+-------------+-----------------------+ 

我設法插入問題db，但我有麻煩插入選擇，因爲我很困惑我應該怎麼做$questions爲了得到選擇...

任何建議（S）會做！

Answer 1

我會不是使用json_encode()因爲你正在建立一個規範化的數據結構。

下面是你需要做什麼的細目;

• 插入問題納入questions
• 抓住last_insert_id並將其存儲在一個變量
• 使用last_insert_id

現在，請將答案爲answers

鏈接的問題的答案到代碼上。

收集數據

$arrAnswers = array(); 
$arrQuestions = array(); 
$id = 0; //Assuming your table is empty 

foreach($entries as $entry) { //Loop through the grabbed records 
    if(is_numeric(substr($entry, 0, 1)) === true) { //Is it a question? 
    $id++;  
    $arrAnswers[$id] = array(); 
    $arrQuestions[$id] = '(\''. $entry .'\')'; 
    } else { //Ok, it's a possible answer to a question 
    $arrAnswers[] = '(\''. $entry .'\', '. $id .', 0)'; 
    } 
} 

插入問題

現在我們有一個數組保存所有的答案的一個問題。數組鍵是數據庫中的問題ID。我們現在可以通過干預來插入問題;

$strDbQuery = "INSERT INTO `questions` (`q_name`) VALUES ". implode(", ", $arrQuestions); 
// Execute the query. 

插入

現在你已經插入你的問題的答案，你現在可以將你的答案。

$strDbQuery = "INSERT INTO `answers` (`choices`, `question`, `correct`) VALUES ". implode(", ", $arrAnswers); 
// Execute the query. 

因爲你的數組（不是你的問題）沒有保存一個值來表明答案是否正確，你必須手動完成。

Answer 2

要存儲數組，您需要將其作爲字符串寫入數據庫。有兩個（2）功能浮現在腦海：

serialize()serialize
json_encode()json_encode

要麼偉大工程; serialize()將數組轉換爲一個字符串，然後您可以保存;稍後檢索您的數組，將字符串傳遞給unserialize()函數。
json_encode()也具有伴隨的json_decode()功能。要以數組形式讀取數據[而不是此場景中的對象]，您必須這樣做：
$questions = json_decode($string_from_database, true);

我希望這有助於。