微信登錄

//微信登錄
$APPID=’公衆號在微信的appid’;

$url = ‘你的域名’;

// 下面callback文件的位置

$REDIRECT_URI= $url . '/callback.php';
$scope='snsapi_base';
$scope='snsapi_userinfo';

//需要授權

$url='https://open.weixin.qq.com/connect/oauth2/authorize?appid=' . $APPID.'&redirect_uri=' . urlencode($REDIRECT_URI).'&response_type=code&scope='.$scope.'&state='.$state.'#wechat_redirect';

header(“Location:”.$url);

3、第三方網頁的回跳url中，首先從請求中取得code，然後根據code進一步換取openid和access_token，然後就可以根據openid和access_token調用微信的相關接口查詢用戶信息了。

//你的域名/callback.php
public function callback(){

    $appid = "公衆號在微信的appid"; 
    $secret = "公衆號在微信的app secret"; 
    $code = $_GET["code"]; 
    $get_token_url = 'https://api.weixin.qq.com/sns/oauth2/access_token?appid='.$appid.'&secret='.$secret.'&code='.$code.'&grant_type=authorization_code';
    // 再次請求
    $ch = curl_init();
    curl_setopt($ch,CURLOPT_URL,$get_token_url); 
    curl_setopt($ch,CURLOPT_HEADER,0); 
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1 ); 
    curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 10); 
    $res = curl_exec($ch); 
    curl_close($ch); 
    $json_obj = json_decode($res,true); 
    //根據openid和access_token查詢用戶信息 
    $access_token = $json_obj['access_token']; 
    $openid = $json_obj['openid']; 
    $get_user_info_url = 'https://api.weixin.qq.com/sns/userinfo?access_token='.$access_token.'&openid='.$openid.'&lang=zh_CN';  
    $ch = curl_init(); 
    curl_setopt($ch,CURLOPT_URL,$get_user_info_url); 
    curl_setopt($ch,CURLOPT_HEADER,0); 
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1 ); 
    curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 10); 
    $res = curl_exec($ch); c
    url_close($ch);  
    //解析json 
    $user_obj = json_decode($res,true); 
    // 已經獲取回用戶的信息
    $_SESSION['user'] = $user_obj; 
    print_r($user_obj); 

}