微信开发H5接口篇

今天简单的介绍下PHP在微信中的应用，首先我们需要用到公众号中的appid 和 AppSecret 就可以开发了，看代码：
<?php
/**
 * 使用原生
 * 微信类
 */
class Wechat{
    //定义常量
    const APPID = '11122';
    const APPSECRET = '3333';
    //定义变量
    public $access_token ; //微信access_token
    public $redis;//redis
    public $show;//返回
    //实例化
    public function __construct($redis_password = 123456,$redis_domain = '127.0.0.1',$redis_point = 6379,$redis_select = 0){
        //返回参数
        $show = $this->show = 1; 
        // function ($code = 1, $msg = '', $data = []){
        //     echo json_encode(array('code' => $code, 'msg' => $msg, 'data' => $data));
        //     exit;
        // };
        //实例化redis
        $redis = new Redis();
        $redis->connect($redis_domain, $redis_point);
        $redis->auth($redis_password);
        $redis->select($redis_select);
        $this->redis = &$redis;
    }
    /**
     * redis
     */
    function redis():Redis{
        return $this->redis;
    }
   /**
    * 获取assaccess_token 
    * 地址：https://api.weixin.qq.com/sns/oauth2/access_token
    */
    function get_access_token():string{
        //access_token是否存在redis中
        if(!$this->redis->exists('wechat_access_token')){
            $url = "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=".self::APPID."&secret=".self::APPSECRET;
            $res = json_decode(self::curl('GET', $url, []), true);
            if (isset($res['access_token'])) {
                $this->redis->set('wechat_access_token', $res['access_token'], ['ex'=> 7100]);
                return $this->redis->get('wechat_access_token');
            } else {
                self::show(0, '获取ACCESS_TOKEN错误：'.$res['errcode'].",msg:".$res['errmsg']);
            }
        }
        return $this->redis->get('wechat_access_token');
    }
    /**
     * 微信获取code码
     * @param url 前端地址
     * @return void
     */
    function getcode():viod{
        $reques_url = $_POST['url'] ?? 'https://baidu.com';
        $url = 'https://open.weixin.qq.com/connect/oauth2/authorize?appid='.self::APPID.'&redirect_uri='.urlencode($reques_url).'&response_type=code&scope=snsapi_userinfo&state=1#wechat_redirect';
        header("Location:$url");//跳转
    }
    /**
     * 微信登录
     * @param code $code码 客户端传递的code编码
     * @return arrary
     */
    function wxlogin():array{
        $openid = $_POST['openid'] ?? '';
        $access_token = self::get_access_token();
        //获取用户信息
        $url ='https://api.weixin.qq.com/sns/userinfo?access_token={$access_token}&openid={$openid}&lang=zh_CN';
        $userinfo =  json_decode($url,self::curl('GET',$url,[]),true);
        isset($userinfo['errmsg']) ? self::show(0,'失败:'.$userinfo['errmsg']) : self::show(1,'成功',$userinfo);
    }
    /**
     * 返回
     * @param code 
     * @param msg
     * @param data
     * @return json|void
     */ 
    function show($code = 1, $msg = '', $data = []):void{
         echo json_encode(array('code' => $code, 'msg' => $msg, 'data' => $data));
         exit;
    }
    /**
     * Curl操作
     * @param string $type 请求类型 'POST' 或 'GET' 大小写都可以
     * @param string $url 请求地址 url
     * @param array $data 数组 cookie 请求cookie data post请求数据
     * @param bool $headerFile 返回头信息 如果页面做了跳转 则可以从返回头信息获得跳转地址，应用场景不多
     * @return bool|mixed
     */
    function curl($type, $url, $data=[], $headerFile=false) {
        $type = strtoupper($type);
        $type_list = ['POST', 'GET', 'PUT'];
        if(!in_array($type, $type_list)) $type = 'POST';
        $ch = curl_init();
        // 请求类型
        if($type == 'POST') {
            curl_setopt($ch, CURLOPT_POST, 1);
        }else if($type == 'PUT') {
            curl_setopt($ch, CURLOPT_CUSTOMREQUEST,"PUT"); //设置请求方式
        }
        curl_setopt($ch, CURLOPT_URL, trim($url));
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
        curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
        curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, false);
        curl_setopt($ch, CURLOPT_IPRESOLVE, CURL_IPRESOLVE_V4);
        curl_setopt($ch, CURLOPT_ENCODING, ''); // 这个是解释gzip内容, 解决获取结果乱码 gzip,deflate
        // 是否存在请求字段信息
        if(!empty($data['data'])) {
            curl_setopt($ch, CURLOPT_POSTFIELDS, $data['data']);
        }
        // 是否存在cookie
        if(!empty($data['cookie'])) {
            curl_setopt($ch, CURLOPT_COOKIE, $data['cookie']);
        }
        // 请求头
        if(!empty($data['header'])) {
            curl_setopt($ch, CURLOPT_HTTPHEADER, $data['header']);
        }
        // 设置代理
        if(!empty($data['proxy'])) {
            curl_setopt ($ch, CURLOPT_PROXY, $data['proxy']);
        }
        // 证书
        if(!empty($data['ssl_cert'])) {
            curl_setopt($ch,CURLOPT_SSLCERT, $data['ssl_cert']);
        }
        if(!empty($data['ssl_key'])) {
            curl_setopt($ch,CURLOPT_SSLKEY, $data['ssl_key']);
        }
        // 返回ResponseHeader
        if($headerFile) {
            curl_setopt($ch, CURLOPT_HEADER, 1);
        }
        // 设置请求超时时间
        curl_setopt($ch, CURLOPT_TIMEOUT, 6);
        // 发送请求
        $result = curl_exec($ch);
        if (curl_errno($ch)) return false;
        curl_close($ch);
        return $result;
    }
}
 $class = new Wechat();
 $access_token = $class->getcode();
?>