利用微信公众号的模板消息发送公众号通知

/**
 * 发送模板消息
 */
public function sendNotice()
{
    $openid = 'openid';
    $template_id = 'template_id';
    $data = [
        "character_string1" => [
            "value" => time()
        ],
        "thing2" => [
            "value" => '商品',
        ],
        "amount3" => [
            "value" => "42元"
        ],
        "time5" => [
            "value" => date('Y-m-d H:i:s')
        ],
        "time6" => [
            "value" => date('Y-m-d H:i:s')
        ]
    ];
    sendTemplateNotice(0, $openid, $template_id, $data);
}

if (!function_exists('sendTemplateNotice')) {
    /**
     * 发送微信模板消息
     * @param int $type 0:用户 1:商家
     * @param string $openid 
     * @param string $template_id 模板Id
     * @param array $data   模板消息数据
     * @return bool
     */
    function sendTemplateNotice($type = 0, $openid = '', $template_id = '', $data = [])
    {
        $client = new \GuzzleHttp\Client();
        $config = get_addon_config('wanlshop');
        $user_appid = $config['sdk_qq']['gz_appid'];
        $user_secret = $config['sdk_qq']['gz_secret'];
        $shop_appid = $config['sdk_qq']['gz_appids'];
        $shop_secret = $config['sdk_qq']['gz_secrets'];
        $user_access_token_url = 'https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=' . $user_appid .
            '&secret=' . $user_secret;
        $shop_access_token_url = 'https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=' . $shop_appid .
            '&secret=' . $shop_secret;
        if (!empty($type)) {
            $accessTokenResponseData = $client->request('GET', $shop_access_token_url);
        } else {
            $accessTokenResponseData = $client->request('GET', $user_access_token_url);
        }
        $accessTokenResponse = $accessTokenResponseData->getBody();
        $accessTokenResponse = json_decode($accessTokenResponse);
        $url = 'https://api.weixin.qq.com/cgi-bin/message/template/send?access_token=' . $accessTokenResponse->access_token;
        $query = [
            'json' => [
                "touser" => $openid,
                "template_id" => $template_id,
                // "miniprogram" => [
                //     "appid" => "appid",
                //     "pagepath" => "pagepath"
                // ],
                "client_msg_id" => time(),
                "data" => $data
            ],
            'headers' => [
                'Content-Type' => 'application/json',
            ]
        ];
        write_log($query);
        $responseData = $client->request('POST', $url, $query);
        $response = $responseData->getBody();
        write_log($response->getContents());
        return true;
    }
}

模板消息提醒文档:https://developers.weixin.qq.com/doc/offiaccount/Message_Management/Template_Message_Interface.html#发送模板消息