登录逻辑
1. 微信访问网址
2. 第一次跳转到获取code方法
3. 第二次跳转传入code获取openid，通过openid处理微信登录
4. 跳到登录成功页面，或者绑定页面
代码
// 获取code的
public function wechatLogin(){
$code = input('code');
// 如果cookie缓存里面已经保存着openid，则不会再次获取新的openid
if (empty($code)) {
$protocol = (!empty($_SERVER['HTTPS']) && $_SERVER['HTTPS'] !== 'off' || $_SERVER['SERVER_PORT'] == 443) ? "https://" : "http://";
$url = $protocol.$_SERVER['HTTP_HOST'].$_SERVER['REQUEST_URI'];
header('Location:https://统一获取code的域名/api/wechat/getCode/?url='.$url);
exit;
}else{
// 防止刷新时导致重复带入过期code导致获取openid错误
$options = array (
'appid' => 'xxx', // 填写高级调用功能的appid
'appsecret' => 'xxx' // 填写高级调用功能的密钥
);
$wechat = new WechatApi($options);
$result = $wechat->getOauthAccessToken($code);
// access_token,expires_in,refresh_token,openid,scope
}
}上面跳转获取code的代码
// 获取code
public function getCode(){
ob_start();
$myurl = Request::param('url');
$options = array (
'token' => '', // 填写你设定的key
'appid' => '', // 填写高级调用功能的appid
'appsecret' => '' // 填写高级调用功能的密钥
);
$wechat = new WechatApi($options);
$callback = 'https://域名/oauth.php?url= '.$myurl;
$url = $wechat->getOauthRedirect($callback,$state='',$scope='snsapi_base');
header("Location:".$url);
exit;
}oauth.php
<!DOCTYPE HTML>
<html>
<head>
<meta charset="UTF-8">
<title>授权页面跳转中</title>
</head>
<body>
<?php
$url = $_GET['url'];
$url = $url.'?code='.$_GET['code'];
Header("Location: $url");
?>
</body>
</html>这里有上面代码所需要的类
点击这里查看 WechatApi类
可以用微信打开以下地址查看演示
https://www.liqingbo.cn/apis/wechat/wechatlogin