Generate QR code with parameters

QR code with parameters

There are currently two types of QR codes: one is a temporary QR code, and the other is a permanent QR code. Because there are relatively few permanent QR codes, there are currently only 100,000 at most, so let's create a temporary QR code first.

First, we need to create a QR code ticket, and then use the ticket to exchange for the QR code.

The first step is to create a ticket:

Then we need to create post data like this:

{"action_name": "QR_LIMIT_SCENE", "action_info": {"scene": {"scene_id": 123}}}
or
{"action_name": "QR_LIMIT_STR_SCENE", "action_info": {"scene": {"scene_str": "test"}}}

{"expire_seconds": 1800, "action_name": "QR_SCENE", "action_info": {"scene": {"scene_id": 123}}}
The first parameter represents the valid time, and the second parameter is the temporary QR code The identity of the , is a constant, and the third parameter is the "scene_id" we want to put in

It should be noted here that scene_str is created in the form of a string.

The first step, we are going to get the ticket (here we are using string form!!!)

$queryUrl = 'https://api.weixin.qq.com/cgi-bin/qrcode/create?access_token='.$accessToken;

        $queryAction = 'POST';

        $template = array();

        if($type == 1){

            $template['expire_seconds'] = $expireSeconds;

            $template['action_name'] = 'QR_STR_SCENE';

        }else{

            $template['action_name'] = 'QR_LIMIT_STR_SCENE';

        }

        $template['action_info']['scene']['scene_str'] = $sceneStr;

        $template = json_encode($template,JSON_UNESCAPED_UNICODE);

$template will return the following values

{"expire_seconds":"2592000","action_name":"QR_STR_SCENE","action_info":{"scene":{"scene_str":"你好"}}}

In this way, we have created a string that meets the requirements, and then we only need to call the interface.

return Curl::callWebServer($queryUrl, $template, $queryAction);

What is written in my Curl::callwebserver method is to call the method of external url.

will return if correct

{"ticket":"gQFL8DwAAAAAAAAAAS5odHRwOi8vd2VpeGluLnFxLmNvbS9xLzAyWHNFdjRPYU1kWm0xZXBPOGhyY0UAAgSZZeFaAwQAjScA","expire_seconds":2592000,"url":"http:\/\/weixin.qq.com\/q\/02XsEv4OaMdZm1epO8hrcE"}

We will get tickets.

The second step is to exchange the QR code according to the ticket. Remind that the ticket needs to be urlencode.

$queryUrl = 'https://mp.weixin.qq.com/cgi-bin/showqrcode?ticket='.urlencode($ticket);//Encode the string in url
        $queryAction = 'GET';
        $result = Curl::callWebServer($queryUrl, '', $queryAction, 0);

In this case, if the ticket is correct, the http return code is 200, which is an image that can be displayed or downloaded directly.

We can download the image locally:

$filename='./Public/qrcode/' .time().'.jpg';

        file_put_contents($filename, $result);

Then it can be displayed on the page.

Generate QR code with parameters

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