PHP WeChat generates a WeChat public account QR code and scans it to enter the public account with parameters

This article mainly introduces the QR code generated by php WeChat to enter the WeChat public account with parameters. It has a certain reference value. Now I share it with you. Friends in need can refer to it

In order to meet the needs of scenarios such as user channel promotion analysis and user account binding, the public platform provides an interface for generating QR codes with parameters. Using this interface, multiple QR codes with different scene values ​​can be obtained. After the user scans them, the public account can receive event push.

There are currently 2 types of QR codes:

1. Temporary QR code has an expiration time, and can be set to a maximum of 30 days after the QR code is generated ( That is, it will expire after 2,592,000 seconds), but it can generate larger quantities. Temporary QR codes are mainly used in business scenarios that do not require permanent storage of QR codes, such as account binding.
2. Permanent QR codes have no expiration time, but the number is small (currently up to 100,000). Permanent QR codes are mainly used in scenarios such as account binding and user source statistics.

When a user scans a QR code with a scene value, the following two events may be pushed:

If the user has not followed the official account, the user can follow the official account. After following, WeChat will Scenario value attention events are pushed to developers.

If the user has followed the official account, the user will automatically enter the session after scanning, and WeChat will also push the scanning event with scene value to the developer.

The process of obtaining a QR code with parameters includes two steps. First, create a QR code ticket, and then use the ticket to the specified URL to exchange for the QR code.

Create QR code ticket

Every time you create a QR code ticket, you need to provide a parameter (scene_id) set by the developer. We will introduce the temporary QR code and the permanent QR code respectively. The process of creating a QR code ticket.

Notice
expire_seconds The validity time of the QR code, in seconds. The maximum value cannot exceed 2592000 (that is, 30 days). If this field is not filled in, the default validity period is 30 seconds.
action_name QR code type, QR_SCENE is a temporary integer parameter value, QR_STR_SCENE is a temporary string parameter value, QR_LIMIT_SCENE is a permanent integer parameter value, QR_LIMIT_STR_SCENE is a permanent string parameter value
action_info QR code details
scene_id Scene value ID, which is a 32-bit non-zero integer when using a temporary QR code. The maximum value when using a permanent QR code is 100000 (currently the parameter only supports 1–100000)
scene_str Scene value ID (ID in string form), string type, length limit is 1 to 64

<?php
namespace app\api\model;
set_time_limit(30);
class WxQrcode{
    //构造方法
    static $qrcode_url = "https://api.weixin.qq.com/cgi-bin/qrcode/create?";    
    static $token_url = "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&";    
    static $qrcode_get_url = "https://mp.weixin.qq.com/cgi-bin/showqrcode?";    //生成二维码
    public function getEwm($fqid,$type = 1){
        $appid = &#39;你的appid&#39;;        $secret = &#39;你的secret&#39;;        
        $ACCESS_TOKEN = $this->getToken($appid,$secret);        
        $url = $this->getQrcodeurl($ACCESS_TOKEN,$fqid,$type);
        save_log(&#39;测试保存的路径&#39;.$url.&#39;fid&#39;.$fqid);        
        return $this->DownLoadQr($url,time());
    }    
    protected function getQrcodeurl($ACCESS_TOKEN,$fqid,$type = 1){
        $url = self::$qrcode_url.&#39;access_token=&#39;.$ACCESS_TOKEN;        
        if($type == 1){            
        //生成永久二维码
            $qrcode= &#39;{"action_name": "QR_LIMIT_SCENE", "action_info": {"scene": {"scene_str": &#39;.$fqid.&#39;}}}&#39;;
        }else{            
        //生成临时二维码
            $qrcode = &#39;{"expire_seconds": 604800, "action_name": "QR_STR_SCENE", "action_info": {"scene": {"scene_str": &#39;.$fqid.&#39;}}}&#39;;
        }        $result = $this->http_post_data($url,$qrcode);        
        $oo = json_decode($result[1]);        
        if (empty($oo->ticket)){            
        return false;
        }        
        if(!$oo->ticket){            
        $this->ErrorLogger(&#39;getQrcodeurl falied. Error Info: getQrcodeurl get failed&#39;);            
        exit();
        }        $url = self::$qrcode_get_url.&#39;ticket=&#39;.$oo->ticket.&#39;&#39;;        
        return $url;
    }    
    protected function getToken($appid,$secret){
        $ACCESS_TOKEN = file_get_contents(self::$token_url."appid=$appid&secret=$secret");        
        $ACCESS_TOKEN = json_decode($ACCESS_TOKEN);        
        $ACCESS_TOKEN = $ACCESS_TOKEN->access_token;        
        return $ACCESS_TOKEN;
    }    
    protected function http_post_data($url, $data_string) {

        $ch = curl_init();
        curl_setopt($ch, CURLOPT_POST, 1);
        curl_setopt($ch, CURLOPT_URL, $url);
        curl_setopt($ch, CURLOPT_POSTFIELDS, $data_string);
        curl_setopt($ch, CURLOPT_HTTPHEADER, array(                
        &#39;Content-Type: application/json; charset=utf-8&#39;,                
        &#39;Content-Length: &#39; . strlen($data_string))
        );
        ob_start();
        curl_exec($ch);        i
        f (curl_errno($ch)) {            
        $this->ErrorLogger(&#39;curl falied. Error Info: &#39;.curl_error($ch));
        }        
        $return_content = ob_get_contents();
        ob_end_clean();        
        $return_code = curl_getinfo($ch, CURLINFO_HTTP_CODE);        
        return array($return_code, $return_content);
    }    //下载二维码到服务器
    protected function DownLoadQr($url,$filestring){
        if($url == ""){            
        return false;
        }        
        $filename = $filestring.rand(0,99999999999).&#39;.jpg&#39;;
        ob_start();
        readfile($url);        
        $img=ob_get_contents();
        ob_end_clean();        
        $size=strlen($img);        
        $fp2=fopen(&#39;static/qrcode/&#39;.$filename,"a");        
        if(fwrite($fp2,$img) === false){            
        $this->ErrorLogger(&#39;dolwload image falied. Error Info: 无法写入图片&#39;);            
        exit();
        }
        fclose($fp2);        
        return &#39;static/qrcode/&#39;.$filename;
    }    //错误日志
    private function ErrorLogger($errMsg){
        $logger = fopen(&#39;log.txt&#39;, &#39;a+&#39;);
        fwrite($logger, date(&#39;Y-m-d H:i:s&#39;)." Error Info : ".$errMsg."\r\n");
        fclose($logger);
    }

}

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