PHP没有在MySQL表中插入多个数据

Question

我正在尝试建立一个多选题考试门户。它工作正常，但是当我在add.php文件中添加一个问题时，它会被插入，但问题的选择没有插入数据库中

这是我的数据库：

选择表：

问题表：

这是我的add.php

代码

<?php include 'includes/header.php'; ?>
<?php include 'config/config.php'; ?>
<?php include 'lib/Database.php'; ?>
<?php
$db = new Database();
if (isset($_POST['submit'])) {
    //Grab Post Data
    $question_number = $_POST['question_number'];
    $question_text = $_POST['question_text'];
    $correct_choice = $_POST['correct_choice'];
    $choices = array();
    $choices[1] = $_POST['choice1'];
    $choices[2] = $_POST['choice2'];
    $choices[3] = $_POST['choice3'];
    $choices[4] = $_POST['choice4'];

    //Insert question into database
    $query = "INSERT INTO `questions`(question_number, text) VALUES('$question_number','$question_text')";
    $insert_row = $db->insert($query);
    //validate
    if ($insert_row) {
        foreach ($choices as $choice => $value) {
            if ($value != '') {
                if ($correct_choice == $choice) {
                    $is_correct = 1;
                } else {
                    $is_correct = 0;
                }
                //Choice Query
                $query = "INSERT INTO `choices`(question_number,is_correct,text) VALUES('$question_number','$is_correct',
                             '$value')";
                //insert row
                $insert_row = $db->insert($query);
                if ($insert_row) {
                    continue;
                } else {
                    die($mysqli->error);
                }

            }
        }
    }
}
$query1 = "SELECT * FROM `questions`";
$result = $db->select($query1);
$total = $result->num_rows;
$next = $total + 1;
?>
 <form class="form-horizontal" action="signup.php" method="POST">
  <fieldset>
            <div id="legend">
              <legend class="text-center">Add Questions</legend>
            </div>
            <div class="control-group">
              <label class="control-label" for="username">Question Number</label>
               <div class="controls">
                <input name="question_number" value="<?php echo $next; ?>" placeholder="" class="form-control input-lg" type="number"/>
              </div>
            </div>
             <div class="control-group">
              <label class="control-label" for="text">Question Text</label>
              <div class="controls">
                <input name="text" placeholder="" class="form-control input-lg" type="text">
              </div>
            </div>
            <div class="control-group">
              <label class="control-label" for="choice1">#Choice 1</label>
              <div class="controls">
                <input  name="choice1" placeholder="" class="form-control input-lg" type="text">
              </div>
            </div>
            <div class="control-group">
              <label class="control-label" for="username">#Choice 2</label>
              <div class="controls">
                <input id="choice2" name="choice2" placeholder="" class="form-control input-lg" type="text">
              </div>
            </div>
            <div class="control-group">
              <label class="control-label" for="username">#Choice 3</label>
              <div class="controls">
                <input id="choice3" name="choice3" placeholder="" class="form-control input-lg" type="text">
              </div>
            </div>
            <div class="control-group">
              <label class="control-label" for="username">#Choice 4</label>
              <div class="controls">
                <input id="username" name="choice4" placeholder="" class="form-control input-lg" type="text">
              </div>
            </div>
            <div class="control-group">
              <label class="control-label" for="username">Correct Choice Number</label>
               <div class="controls">
                <input id="username" name="correct_choice" placeholder="" class="form-control input-lg" type="number"/>
              </div>
            </div>
            <input type="submit" name="submit" class="btn btn-block btn-primary" value="Submit" class="submit"/>
  </fieldset>         
 </form>
<?php include 'includes/footer.php';?>

现在只有问题是在数据库中添加而不是选择。

Answer 1

语法似乎是正确的，但您可以删除数字周围的简单引号。此外，最好一个请求插入所有选项。

document.getElementById("totalcost").value = (+(document.getElementById("pg").value) || 0) + (+(document.getElementById("totalcost").value) || 0);

你的变量$ value和$ question_number来自$ _POST变量，你必须使用预准备语句来保护你的查询免受SQL注入。