Question

我有数据库表，其中包含许多问题，每个问题都有相应的答案选项（多项选择题）。

表格中的列如下所示：

questionID | questionText |回答| option1 |选项2 |选项3 | answerExplanation

在我的session.php文件中，我使用PHP和mySQL从数据库中提取单个问题（带有答案选项），该问题保存在变量$ question中。

然后在我的$question文件中使用此index.php来显示问题，例如

Question: <?php echo $question['questionText'] ?>  
Option 1: <?php
    > echo $question['option1] ?> 
Option 2: <?php echo $question['option2']?>.

我想使用SESSION存储一组用户看过的问题。

然而，我对此有些困难。似乎会话一直在重置每个新问题。

以下是我的session.php：

<?php 
session_start();
echo session_id();

$servername = "localhost";
$username = "root";
$password = "root";
$dbname = "dbname";

// Create connection
$conn = new mysqli($servername, $username, $password, $dbname);
// Check connection
if ($conn->connect_error) {
    die("Connection failed: " . $conn->connect_error);
} 



// initialise session variable with array 
$_SESSION['questionhistory'] = [];

//Total Number of Questions in DB
$query_count = $conn->query("SELECT questionID FROM BBQuestions");
$totalquestions = $query_count->num_rows;


function findQuestion() {
    global $conn;
    $sql = "SELECT * FROM BBQuestions ORDER BY rand() LIMIT 1";

    $result = $conn->query($sql);
    $question = $result->fetch_assoc();

    $q_id = $question["questionID"]; //Get ID for question
    $q_id_integer = (int)$q_id; // Integer-ise the ID.

    // Checks to see if question is already seen (i.e. in SESSION['questionhistory'])
    if (in_array($q_id_integer, $_SESSION['questionhistory'])) {
        return 0;
    }
    else {
        return $question;
    }
}


//checks to see if user has seen all questions 
function checkIfAllDone() {
    global $totalquestions;
    $x = count($_SESSION['questionhistory']); 
    if ($x == $totalquestions) {
        echo "ALL DONE";
        return 1;
    }
    else {
        return 0;
    }
}

$done = CheckIfAllDone();

//returns a question to be is echo-ed in index.php.
function pushQuestion() {
    global $done;
    $question = findQuestion();
    if ($done != 1) {
    while ($question == 0) {
        $question = findQuestion();
    }
    return $question;
}
}

$question = pushQuestion();  // question that is echo-ed in index.php

$question_json = json_encode($question);


$var = $question['questionID'];
array_push($_SESSION['questionhistory'], $var);

//Show whats in Array
foreach ($_SESSION['questionhistory'] as $item) {
echo $item . " - ";
}

如何确保会话数组更新时出现每个新问题？

会话变量继续重置

0 个答案: