PHP 및 AJAX를 사용하여 구현된 동적 온라인 투표 시스템

id INT(11) NOT NULL AUTO_INCREMENT,
name VARCHAR(255) NOT NULL,
votes INT(11) NOT NULL,
PRIMARY KEY (id)

<title>动态在线投票系统</title>
<script src="https://code.jquery.com/jquery-3.6.0.min.js"></script>
<script>
    $(document).ready(function(){
        $(".vote-button").click(function(){
            var optionId = $(this).data("option-id");
            $.ajax({
                url: "vote.php",
                method: "POST",
                data: {optionId: optionId},
                success: function(response){
                    $("#result-container").html(response);
                }
            });
        });
    });
</script>

<h1>动态在线投票系统</h1>
<div id="options-container">
    <?php
        // 连接数据库
        $conn = new mysqli("localhost", "username", "password", "vote");
        if ($conn->connect_error) {
            die("连接数据库失败: " . $conn->connect_error);
        }
        
        // 查询投票选项
        $sql = "SELECT * FROM options";
        $result = $conn->query($sql);
        
        // 输出投票选项
        if ($result->num_rows > 0) {
            while($row = $result->fetch_assoc()) {
                echo '<div class="option">
                        <span class="option-name">' . $row["name"] . '</span>
                        <button class="vote-button" data-option-id="' . $row["id"] . '">投票</button>
                    </div>';
            }
        } else {
            echo "暂无投票选项";
        }
        
        $conn->close();
    ?>
</div>
<div id="result-container">
    <!-- 投票结果将在这里显示 -->
</div>

if(isset($_POST["optionId"])){
    // 连接数据库
    $conn = new mysqli("localhost", "username", "password", "vote");
    if ($conn->connect_error) {
        die("连接数据库失败: " . $conn->connect_error);
    }
    
    // 获取选项ID和更新投票结果
    $optionId = $_POST["optionId"];
    $sql = "UPDATE options SET votes = votes + 1 WHERE id = $optionId";
    $conn->query($sql);
    
    // 查询更新后的投票结果
    $sql = "SELECT * FROM options";
    $result = $conn->query($sql);
    
    // 输出投票结果
    if ($result->num_rows > 0) {
        while($row = $result->fetch_assoc()) {
            echo '<div class="result">
                    <span class="option-name">' . $row["name"] . '</span>
                    <span class="option-votes">' . $row["votes"] . ' 票</span>
                </div>';
        }
    } else {
        echo "暂无投票结果";
    }
    
    $conn->close();
}