无标题

开发十年，就只剩下这套Java开发体系了 >>>   

<?php

class WxUser
{
    private $config;
    private $CURL_TIMEOUT=6;
    function __construct($config=[])
    {
        $this->setConfig($config);
    }

    /**
     * 设置必须配置的信息
     * @param $config
     * @return $this
     */
    public function setConfig($config){
        $this->config['APPID']=$config['AppID'];
        $this->config['APPSECRET']=$config['AppSecret'];
        $this->config['REDIRECT_URI']='http://'.$_SERVER['HTTP_HOST'].$_SERVER['REQUEST_URI'];
        return $this;
    }
    /**
     *
     * 通过跳转获取当前用户的基本信息openid。跳转流程如下：
     * 1、设置自己需要调回的url及其其他参数，跳转到微信服务器https://open.weixin.qq.com/connect/oauth2/authorize
     * 2、微信服务处理完成之后会跳转回用户redirect_uri地址，此时会带上一些参数，如：code
     */
    public function getOpenid()
    {
        //通过code获得openid
        if (!isset($_GET['code'])){
            //触发微信返回code码
            $baseUrl = urlencode($this->config['REDIRECT_URI']);
            $url = $this->__CreateOauthUrlForCode($baseUrl);
            header("Location: $url");
            exit();
        } else {
            //获取code码，以获取openid
            $url = $this->__CreateOauthUrlForOpenid($_GET['code']);
            $info= $this->GetCurl($url);
            return $info['openid'];
        }
    }

    function getAccess_arr(){
        $urlObj["grant_type"] = "client_credential";
        $urlObj["appid"] = $this->config['APPID'];
        $urlObj["secret"] = $this->config['APPSECRET'];
        $url='https://api.weixin.qq.com/cgi-bin/token?'.$this->ToUrlParams($urlObj);
        return $this->GetCurl($url);
    }

    /**
     *
     * 构造获取open和access_toke的url地址
     * @param string $code，微信跳转带回的code
     *
     * @return 请求的url
     */
    private function __CreateOauthUrlForOpenid($code)
    {
        $urlObj["appid"] = $this->config['APPID'];
        $urlObj["secret"] = $this->config['APPSECRET'];
        $urlObj["code"] = $code;
        $urlObj["grant_type"] = "authorization_code";
        return "https://api.weixin.qq.com/sns/oauth2/access_token?".$this->ToUrlParams($urlObj);
    }

    /**
     *
     * 构造获取code的url连接
     * @param string $redirectUrl 微信服务器回跳的url，需要url编码
     *
     * @return 返回构造好的url
     */
    private function __CreateOauthUrlForCode($redirectUrl)
    {
        $urlObj["appid"] = $this->config['APPID'];
        $urlObj["redirect_uri"] = "$redirectUrl";
        $urlObj["response_type"] = "code";
        $urlObj["scope"] = "snsapi_base";
        $urlObj["state"] = "STATE"."#wechat_redirect";
        return "https://open.weixin.qq.com/connect/oauth2/authorize?".$this->ToUrlParams($urlObj);
    }

    /**
     * get方式获取远程服务器中的数据
     * @param $url
     * @return mixed
     */
    private function GetCurl($url)
    {
        //初始化curl
        $ch = curl_init();
        curl_setopt($ch, CURLOPT_URL, $url);

        curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false); // 对认证证书来源的检查
        curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, false); // 从证书中检查SSL加密算法是否存在
        curl_setopt($ch, CURLOPT_USERAGENT, $_SERVER['HTTP_USER_AGENT']); // 模拟用户使用的浏览器
        //设置超时
        curl_setopt($ch, CURLOPT_TIMEOUT, $this->CURL_TIMEOUT);
        curl_setopt($ch, CURLOPT_SSL_VERIFYPEER,FALSE);
        curl_setopt($ch, CURLOPT_SSL_VERIFYHOST,FALSE);
        curl_setopt($ch, CURLOPT_HEADER, FALSE);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, TRUE);
        //运行curl，结果以jason形式返回
        $res = curl_exec($ch);
        curl_close($ch);
        //取出返回数据
        return json_decode($res,true);
    }

    /**
     *
     * 拼接签名字符串
     * @param array $urlObj
     *
     * @return 返回已经拼接好的字符串
     */
    private function ToUrlParams($urlObj)
    {
        $buff = "";
        foreach ($urlObj as $k => $v)
        {
            if($k != "sign"){
                $buff .= $k . "=" . $v . "&";
            }
        }
        $buff = trim($buff, "&");
        return $buff;
    }
}

使用方式

$config['AppID']='';
$config['AppSecret']='';
$WxUser=new WxUser($config);
echo $id=$WxUser->getOpenid();