如今运动计步很火，不管是蚂蚁森林，仍是微信上都很火爆，本文介绍了微信小程序微信运动步数的实例代码，分享给你们php

思路：wx.login获取的code请求获取的session_key，wx.getWeRunData获取的iv,encryptData，将它们一块儿发送到后台解密就好了。json

安全顾虑，由于只是示例因此直接传递session_key了，为了安全最好按照下图的方式加密后存储到Redis中再传递key。小程序

小程序端代码

get3rdSession: function () {

let that = this

wx.request({

url: 'https://localhost/login.php',

data: {

code: this.data.code

},

method: 'GET', // OPTIONS, GET, HEAD, POST, PUT, DELETE, TRACE, CONNECT

success: function (res) {

var sessionId = res.data;

that.setData({ sessionId: sessionId })

wx.setStorageSync('sessionId', sessionId)

that.decodeUserInfo()

}

})

},

decodeUserInfo: function () {

let that = this

wx.request({

url: 'https://localhost/decrypt.php',

data: {

encryptedData: that.data.encryptedData,

iv: that.data.iv,

session: wx.getStorageSync('sessionId')

},

method: 'GET', // OPTIONS, GET, HEAD, POST, PUT, DELETE, TRACE, CONNECT

// header: {}, // 设置请求的 header

success: function (res) {

let todayStep = res.data.stepInfoList.pop()

that.setData({

step: todayStep.step

});

}

})

},

onLoad: function () {

let that = this

wx.login({

success: function (res) {

let code = res.code

that.setData({ code: code })

wx.getWeRunData({//解密微信运动

success(res) {

const wRunEncryptedData = res.encryptedData

that.setData({ encryptedData: wRunEncryptedData })

that.setData({ iv: res.iv })

that.get3rdSession()//解密请求函数

}

})

}

})

}

后台这使用的是官方PHP版本Demo：先处理login的请求，login.php直接返回session_key，而后再一块儿请求decrypt.php进行解密。微信小程序

login.php部分代码

$appid = '你的appid';

$appsecret = '你的appsecret';

$url = 'https://api.weixin.qq.com/sns/jscode2session?appid='.$appid.'&secret='.$appsecret.'&js_code='.$_GET['code'].'&grant_type=authorization_code';

$content = file_get_contents($url);

$content = json_decode($content);

echo $content->session_key;

decrypt.php部分代码

$pc = new WXBizDataCrypt($appid, $sessionKey);

$errCode = $pc->decryptData($encryptedData, $iv, $data );

if ($errCode == 0) {

print($data . "\n");

} else {

print($errCode . "\n");

}