微信授权验证类

微信auth授权验证类，在别人的基础上修改的，有用的上的参考下
<?php

/**
* 微信授权相关接口
*
*
*/

class wechatauth {
   
    //高级功能-》开发者模式-》获取
    private $app_id = 'wxa0c4*************';
    private $app_secret = 'e095b6dc**********************';

    /**
     * 获取微信授权链接
     *
     * @param string $redirect_uri 跳转地址
     * @param mixed $state 参数
     */
    public function get_authorize_url($redirect_uri = '', $state = '')
    {
        $redirect_uri = urlencode($redirect_uri);
        return "https://open.weixin.qq.com/connect/oauth2/authorize?appid={$this->app_id}&redirect_uri={$redirect_uri}&response_type=code&scope=snsapi_userinfo&state={$state}#wechat_redirect";
    }
   
    /**
     * 获取授权token
     *
     * @param string $code 通过get_authorize_url获取到的code
     */
    public function get_access_token($app_id = '', $app_secret = '', $code = '')
    {
        $token_url = "https://api.weixin.qq.com/sns/oauth2/access_token?appid={$this->app_id}&secret={$this->app_secret}&code={$code}&grant_type=authorization_code";
        $token_data = $this->http($token_url);
       
        if($token_data[0] == 200)
        {
            return json_decode($token_data[1], TRUE);
        }
       
        return FALSE;
    }
   
    /**
     * 获取授权后的微信用户信息
     *
     * @param string $access_token
     * @param string $open_id
     */
    public function get_user_info($access_token = '', $open_id = '')
    {
        if($access_token && $open_id)
        {
            $info_url = "https://api.weixin.qq.com/sns/userinfo?access_token={$access_token}&openid={$open_id}&lang=zh_CN";
            $info_data = $this->http($info_url);
           
            if($info_data[0] == 200)
            {
                return json_decode($info_data[1], TRUE);
            }
        }
       
        return FALSE;
    }
    /**
     * 验证授权
     *
     * @param string $access_token
     * @param string $open_id
     */
    public function check_access_token($access_token = '', $open_id = '')
    {
        if($access_token && $open_id)
        {
            $info_url = "https://api.weixin.qq.com/sns/auth?access_token={$access_token}&openid={$open_id}&lang=zh_CN";
            $info_data = $this->http($info_url);
           
            if($info_data[0] == 200)
            {
                return json_decode($info_data[1], TRUE);
            }
        }
       
        return FALSE;
    }
    //curl
    public function http($url, $method, $postfields = null, $headers = array(), $debug = false)
    {
        $ci = curl_init();
        /* Curl settings */
        curl_setopt($ci, CURLOPT_HTTP_VERSION, CURL_HTTP_VERSION_1_1);
        curl_setopt($ci, CURLOPT_CONNECTTIMEOUT, 30);
        curl_setopt($ci, CURLOPT_TIMEOUT, 30);
        curl_setopt($ci, CURLOPT_RETURNTRANSFER, true);

        switch ($method) {
            case 'POST':
                curl_setopt($ci, CURLOPT_POST, true);
                if (!empty($postfields)) {
                    curl_setopt($ci, CURLOPT_POSTFIELDS, $postfields);
                    $this->postdata = $postfields;
                }
                break;
        }
        curl_setopt($ci, CURLOPT_URL, $url);
        curl_setopt($ci, CURLOPT_HTTPHEADER, $headers);
        curl_setopt($ci, CURLINFO_HEADER_OUT, true);

        $response = curl_exec($ci);
        $http_code = curl_getinfo($ci, CURLINFO_HTTP_CODE);

        if ($debug) {
            echo "=====post data======\r\n";
            var_dump($postfields);

            echo '=====info=====' . "\r\n";
            print_r(curl_getinfo($ci));

            echo '=====$response=====' . "\r\n";
            print_r($response);
        }
        curl_close($ci);
        return array($http_code, $response);
    }

}
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放出输出的demo，有用的上的可以参考
//微信认证链接
    public function wxurl(){
        import('MyClass.Wechatauth',APP_PATH);
        $Wechat = new wechatauth();
        $token = session('token'); //查看是否已经授权
        if (!empty($token)) {
            print_r($token);
            $state = $Wechat->check_access_token($token['access_token'],$token['openid']); //检验token是否可用(成功的信息："errcode":0,"errmsg":"ok")
            print_r($state);
        }
        $url = $Wechat->get_authorize_url('http://twx.vjiankang.org/wsite/test/wxrurl','1'); //此处链接授权后，会跳转到下方处理
        echo '<a href='.$url.'>授权</a>';
    }
   
    //微信返回字符串
    public function wxrurl(){
        import('MyClass.Wechatauth',APP_PATH);
        $Wechat = new wechatauth();
        print_r($_GET); //授权成功后跳转到此页面获取的信息
        $token = $Wechat->get_access_token('','',$_GET['code']); //确认授权后会，根据返回的code获取token
        print_r($token);
        session('token',$token); //保存授权信息
        $user_info = $Wechat->get_user_info($token['access_token'],$token['openid']); //获取用户信息
        print_r($user_info);
    }
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需要注意的是，我们用于返回的url，需要在微信公众平台-》开发者-》auth认证里修改为同一域名下