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H5PHP application: Create a unique big wheel lottery event

王林Original: 2024-03-04 16:12:04401browse

The big carousel lottery has always been an effective way to attract users to participate. Through a highly interactive and interesting lottery form, it can attract more users to participate and increase participation in the event. degree and dissemination. In today's Internet era, with the help of H5 technology and PHP language, we can easily create a unique big carousel lottery event. Next, we will introduce how to use H5 and PHP to build a big carousel lottery event, and give specific code examples.

1. Preparation

Before starting to build the big carousel lottery event, we first need to prepare the following materials:

A Web server , supports PHP language environment
Text editors, such as Notepad, Sublime Text, etc.
Image resources, used to create prize images for the big carousel
Some basic HTML, CSS and PHP programming knowledge

2. Build the big carousel interface

First, we need to create an HTML file to display the big carousel interface. In HTML files, we can use CSS styles to beautify the interface and make it look more attractive. The following is a simple sample code for the big wheel interface:

<!DOCTYPE html>
<html>
<head>
    <title>大转盘抽奖活动</title>
    <link rel="stylesheet" type="text/css" href="style.css">
</head>
<body>
    <div class="container">
        <div class="wheel"></div>
        <button class="spin-btn">开始抽奖</button>
    </div>
    
    <script src="script.js"></script>
</body>
</html>

In the above code, we create an interface that contains the big wheel and a start lottery button. Next, we can use CSS styles to beautify the appearance of the interface and make the big carousel look more lively and interesting. The following is a simple CSS style example:

.container {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
}

.wheel {
    width: 300px;
    height: 300px;
    background-image: url('wheel.png');
    background-size: cover;
}

.spin-btn {
    margin-top: 20px;
    padding: 10px 20px;
    background-color: #f00;
    color: #fff;
    border: none;
    cursor: pointer;
}

3. Write the lottery logic

Next, we need to write the logic of the lottery in the PHP file, including prize settings , lottery algorithm, etc. The following is a simple PHP code example:

<?php
// 奖品列表
$prizes = array(
    array('name' => '一等奖', 'probability' => 0.1),
    array('name' => '二等奖', 'probability' => 0.2),
    array('name' => '三等奖', 'probability' => 0.3),
    array('name' => '谢谢参与', 'probability' => 0.4)
);

// 抽奖算法
$rand = mt_rand(0, 1000) / 1000; // 生成0-1之间的随机数
foreach ($prizes as $prize) {
    if ($rand < $prize['probability']) {
        $result = $prize['name'];
        break;
    }
}

// 输出抽奖结果
echo $result;
?>

In the above code, we first define the prize list and lottery algorithm. When the user clicks the lottery button, the PHP file will randomly generate a prize based on probability and return the result to the front-end interface.

4. Implement the lottery animation

Finally, in the JavaScript file, we can realize the animation effect of the lottery and make the big turntable rotate through the animation properties of CSS3. And display the lottery results when it finally stops. The following is a simple JavaScript code example:

const spinBtn = document.querySelector('.spin-btn');
const wheel = document.querySelector('.wheel');

spinBtn.addEventListener('click', function() {
    wheel.style.animation = 'spin 5s linear forwards';
    setTimeout(() => {
        fetch('draw.php')
            .then(response => response.text())
            .then(data => {
                alert(data);
            });
        wheel.style.animation = '';
    }, 5000);
});

In the above code, we listen to the click event of the lottery button, let the big turntable start rotating after clicking, and stop rotating after 5 seconds, and at the same time, The server sends a request to obtain the lottery results and pops up a prompt box to display the results.

Through the above code example, we can implement a simple but fully functional big wheel lottery event. Readers can modify and optimize the code according to actual needs to create a more unique and attractive lottery event. I hope this article will inspire and help readers to develop big carousel lottery activities in H5 and PHP applications.

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