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<?php
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class WeChatOAuth {
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// 获取微信授权的URL并跳转用户到微信授权页面
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public function getCode($redirect_uri, $state=1, $scope='snsapi_base') {
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// 处理 $redirect_uri，去掉开头的 '/' 以符合微信的要求
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if (substr($redirect_uri, 0, 1) == '/') {
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$redirect_uri = substr($redirect_uri, 1);
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}
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// 微信授权URL模板
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$url = "https://open.weixin.qq.com/connect/oauth2/authorize?"
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. "appid=" . WECHAT_APPID
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. "&redirect_uri=" . urlencode("http://".$_SERVER['HTTP_HOST']."/".$redirect_uri)
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. "&response_type=code&scope=" . $scope
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. "&state=" . $state . "#wechat_redirect";
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// 使用 Location 头进行页面重定向，跳转到微信授权页面
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header("Location: $url");
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exit;
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}
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// 通过授权码获取 access_token 和 openid
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public function getAccessTokenAndOpenId($code) {
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// 构造微信API获取access_token的URL
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$url = "https://api.weixin.qq.com/sns/oauth2/access_token?"
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. "appid=" . WECHAT_APPID
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. "&secret=" . WECHAT_APPSECRET
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. "&code=" . $code
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. "&grant_type=authorization_code";
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// 调用自定义的Curl方法，发送请求到微信API
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$result = Curl::callWebServer($url, null);
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// 解析微信返回的数据（JSON格式）
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$res = json_decode($result, true);
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// 判断请求是否成功
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if (isset($res['access_token']) && isset($res['openid'])) {
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return $res; // 返回access_token和openid
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} else {
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return false; // 请求失败返回false
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}
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}
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// 使用 refresh_token 刷新 access_token
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public function refreshToken($refreshToken) {
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// 构造微信API刷新access_token的URL
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$url = "https://api.weixin.qq.com/sns/oauth2/refresh_token?"
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. "appid=" . WECHAT_APPID
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. "&grant_type=refresh_token"
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. "&refresh_token=" . $refreshToken;
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// 调用自定义的Curl方法，发送请求到微信API
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$result = Curl::callWebServer($url, null);
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// 解析返回的数据
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$res = json_decode($result, true);
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// 判断请求是否成功
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if (isset($res['access_token']) && isset($res['openid'])) {
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return $res; // 返回新的access_token和openid
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} else {
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return false; // 请求失败返回false
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}
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}
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// 获取用户的基本信息
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public function getUserInfo($accessToken, $openId, $lang='zh_CN') {
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// 构造微信API获取用户信息的URL
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$url = "https://api.weixin.qq.com/sns/userinfo?"
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. "access_token=" . $accessToken
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. "&openid=" . $openId
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. "&lang=" . $lang;
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// 调用自定义的Curl方法，发送请求到微信API
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$result = Curl::callWebServer($url, null);
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// 解析返回的JSON数据
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return json_decode($result, true);
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}
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// 检查 access_token 是否有效
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public function checkAccessToken($accessToken, $openId) {
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// 构造微信API验证access_token有效性的URL
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$url = "https://api.weixin.qq.com/sns/auth?"
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. "access_token=" . $accessToken
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. "&openid=" . $openId;
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// 调用自定义的Curl方法，发送请求到微信API
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$result = Curl::callWebServer($url, null);
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// 解析返回的结果
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$res = json_decode($result, true);
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// 如果返回值为 errcode 为 0，说明access_token有效
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if ($res['errcode'] == 0) {
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return true;
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} else {
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return false;
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}
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}
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}
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