Gaoming13\WechatPhpSdk\Api::get_access_token PHP Method

    public function get_access_token()
    {
        $token = false;
        if ($this->get_access_token_diy !== false) {
            // 调用用户自定义获取AccessToken方法
            $token = call_user_func($this->get_access_token_diy);
            if ($token) {
                $token = json_decode($token);
            }
        } else {
            // 异常处理: 获取access_token方法未定义
            @error_log('Not set get_tokenDiy method, AccessToken will be refreshed each time.', 0);
        }
        // 验证AccessToken是否有效
        if (!$this->valid_access_token($token)) {
            // 生成新的AccessToken
            $token = $this->new_access_token();
            if ($token === false) {
                return false;
            }
            // 保存新生成的AccessToken
            if ($this->save_access_token_diy !== false) {
                // 用户自定义保存AccessToken方法
                call_user_func($this->save_access_token_diy, json_encode($token));
            } else {
                // 异常处理: 保存access_token方法未定义
                @error_log('Not set saveTokenDiy method, AccessToken will be refreshed each time.', 0);
            }
        }
        return $token->access_token;
    }