1、配置授權(quán)回調(diào)頁面域名，如 www.aaa.com
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2、模擬公眾號(hào)的第三方網(wǎng)頁，fn_system.php
<?php
if(empty($_SESSION['user'])){
header("Location:http://www.aaa.net/uc/fn_wx_login.php");
}else{
print_r($_SESSION['user']);
}
?>
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3、訪問第三方網(wǎng)頁時(shí)，如果檢查session中不存在會(huì)話信息，則跳轉(zhuǎn)至登陸頁，fn_wx_login.php
<?php
$appid = "公眾號(hào)在微信的appid";
$url = 'https://open.weixin.qq.com/connect/oauth2/authorize?appid='.$appid.'&redirect_uri=http%3a%2f%2fwww.aaa.com%2fuc%2ffn_callback.php&response_type=code&scope=snsapi_userinfo&state=STATE#wechat_redirect';
header("Location:".$url);
?>
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4、在登陸頁組裝appid，回跳url等信息，然后跳轉(zhuǎn)至微信的用戶授權(quán)頁。
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5、在微信的用戶授權(quán)頁，如果用戶選擇了“同意授權(quán)”，則微信重新回跳至第三方網(wǎng)頁的回跳地址時(shí)，會(huì)附帶上code參數(shù)。
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6、第三方網(wǎng)頁的回跳url中，首先從請求中取得code，然后根據(jù)code進(jìn)一步換取openid和access_token，然后就可以根據(jù)openid和access_token調(diào)用微信的相關(guān)接口查詢用戶信息了。
<?php $appid = "公眾號(hào)在微信的appid"; $secret = "公眾號(hào)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'; $ch = curl_init(); curl_setopt($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(jù)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); curl_close($ch); //解析json $user_obj = json_decode($res,true); $_SESSION['user'] = $user_obj; print_r($user_obj); ?>
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