How to use PHP to develop the sports tracking function of WeChat applet?

How to use PHP to develop the sports tracking function of WeChat applet?

With the continuous improvement of people's health awareness, more and more people are beginning to pay attention to exercise. The popularity of WeChat mini-programs has made it possible to develop sports tracking functions. This article will introduce how to use PHP to develop the motion tracking function of WeChat applet and provide relevant code examples.

First of all, we need to configure the WeChat applet background. Open the WeChat Mini Program Developer Tool, create a new project, and fill in the corresponding AppID.

Next, we need to create a PHP file to process the request sent by the applet and return the corresponding results. The following is a simple PHP code example:

<?php
// 验证请求是否来自微信小程序
$signature = $_GET['signature'];
$timestamp = $_GET['timestamp'];
$nonce = $_GET['nonce'];
$token = 'your_token'; // 替换为你自己的token

$token_array = array($token, $timestamp, $nonce);
sort($token_array, SORT_STRING);
$token_string = implode($token_array);
$signature_local = sha1($token_string);

if ($signature != $signature_local) {
    echo 'Invalid request';
    exit;
}

// 处理小程序发送的请求
$method = $_SERVER['REQUEST_METHOD'];
if ($method == 'GET') {
    // 首次验证，返回echostr值
    $echostr = $_GET['echostr'];
    echo $echostr;
} elseif ($method == 'POST') {
    // 处理小程序运动数据
    $data = file_get_contents("php://input");
    $json_data = json_decode($data, true);
    // 在这里可以对运动数据进行业务处理，比如保存到数据库等

    // 返回相应的结果给小程序
    $response = array(
        'error_code' => 0,
        'error_message' => 'Success',
    );
    echo json_encode($response);
}
?>

In the above code, we first verified the request to ensure that the request came from the WeChat applet and that the configured token was consistent with the applet backend. Then depending on the request method, the GET method is used for first verification, while the POST method is used to process the motion data sent by the applet. Here, we can perform some business processing on the motion data, such as saving it to the database. Finally, we return a JSON format response to the applet.

Next, we need to call the PHP interface in the sports page of the mini program to send sports data. The following is a simple applet code example:

wx.login({
    success: function(res) {
        if (res.code) {
            // 发送运动数据到PHP接口
            wx.getWeRunData({
                success: function(data) {
                    wx.request({
                        url: 'http://your_domain.com/path/to/php/file.php',
                        method: 'POST',
                        data: {
                            encryptedData: data.encryptedData,
                            iv: data.iv,
                            code: res.code
                        },
                        success: function(response) {
                            console.log(response.data);
                        }
                    });
                },
                fail: function() {
                    console.log('Failed to get WeRunData');
                }
            });
        } else {
            console.log('Failed to login');
        }
    },
    fail: function() {
        console.log('Failed to login');
    }
});

In the above applet code, we first obtain the user's login information through the wx.login() method, and then call the wx.getWeRunData() method to obtain the user The motion data is encrypted and sent to the PHP interface we created previously through the wx.request() method. The result returned by the interface will be printed in the success callback function of wx.request().

So far, we have completed the development of the sports tracking function of the WeChat applet using PHP. Hope this article is helpful to you!

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