微信网页授权(OAuth2.0) PHP 源码简单实现

提要：

　　1. 建议对OAuth2.0协议做一个学习。

　　2. 微信官方文档和微信官网工具要得到充分利用。

比较简单，直接帖源代码了。其中“xxxxxxxxxx”部分，是需要依据自己环境做替换的

/**
     * OAuth2.0微信授权登录实现
     *
     * @author zzy
     * @文件名：GetWxUserInfo.php
     */

    // 回调地址
    $url = urlencode("http://www.xxxxxxxxx.com/GetWxUserInfo.php");
    // 公众号的id和secret
    $appid = 'xxxxxxxxx';
    $appsecret = 'xxxxxxxxx';
    session_start();

    
    // 获取code码，用于和微信服务器申请token。 注：依据OAuth2.0要求，此处授权登录需要用户端操作
    if(!isset($_GET['code']) && !isset($_SESSION['code'])){
        echo 
        '<a href="https://open.weixin.qq.com/connect/oauth2/authorize?appid=wx6c11a252ff1d00c4
        &redirect_uri='.$url.'&response_type=code&scope=snsapi_userinfo&state=1#wechat_redirect">
        <font style="font-size:30">授权</font></a>';
      
        exit;
    }
    
    // 依据code码去获取openid和access_token，自己的后台服务器直接向微信服务器申请即可
    if (isset($_GET['code']) && !isset($_SESSION['token'])){
        $_SESSION['code'] = $_GET['code'];
        
        $url="https://api.weixin.qq.com/sns/oauth2/access_token?appid=".$appid.
            "&secret=".$appsecret."&code=".$_GET['code']."&grant_type=authorization_code";
        $res = https_request($url);
        $res=(json_decode($res, true));
        $_SESSION['token'] = $res;
    }
    
    print_r($_SESSION);
    
    // 依据申请到的access_token和openid，申请Userinfo信息。
    if (isset($_SESSION['token']['access_token'])){
        $url = "https://api.weixin.qq.com/sns/userinfo?access_token=".$_SESSION['token']['access_token']."&openid=".$_SESSION['token']['openid']."&lang=zh_CN";
        echo $url;
        $res = https_request($url);
        $res = json_decode($res, true);
        
        $_SESSION['userinfo'] = $res;

    }
    
    print_r($_SESSION);

    // cURL函数简单封装
    function https_request($url, $data = null)
    {
        $curl = curl_init();
        curl_setopt($curl, CURLOPT_URL, $url);
        curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, FALSE);
        curl_setopt($curl, CURLOPT_SSL_VERIFYHOST, FALSE);
        if (!empty($data)){
            curl_setopt($curl, CURLOPT_POST, 1);
            curl_setopt($curl, CURLOPT_POSTFIELDS, $data);
        }
        curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);
        $output = curl_exec($curl);
        curl_close($curl);
        return $output;
    } 

得到正确结果如下：

　

Array
(
    [code] => 041GZI4l0tvGHg10N75l05FQ4l0GZI42
    [token] => Array
        (
            [access_token] => TWo6w5QMpzTZibu3FPh2k4EdC5bllp4sGeQkC4NbZtj-zti-ctZj1SrrNL1qGCf2lB1-6o3N7kh2bcxl5bxtQqJEGk1cq12l8CzF40R9XvA
            [expires_in] => 7200
            [refresh_token] => Iz3olCrkqPBOJvSSH2bOKvA09Sjvsp1c8Ltm7MvxxPfQXSbvI_WoVmzhjqASzwlMa7TAGgsg3mIJmaHjL7jrJHDqUF1jKbhd6GNDnLtXq0U
            [openid] => ota_XwQ4r_5nioVmshQ
            [scope] => snsapi_userinfo
        )

    [userinfo] => Array
        (
            [openid] => ota_XwQ4r_5nioVmshQq
            [nickname] => 野狐
            [sex] => 1
            [language] => zh_CN
            [city] => 杭州
            [province] => 浙江
            [country] => 中国
            [headimgurl] => http://wx.qlogo.cn/mmopen/PiajxSqBRaELwee7rhrt2ibnkC1MEnu04WiaWrw9FkuPBbGOgnrMbynNoEuxicgXOetW5VqQbTrS4fZDXNvAWsz6GQ/0
            [privilege] => Array
                (
                )

        )

)