WeChat 미니 프로그램은 매개변수와 미니 프로그램 코드가 포함된 QR 코드를 생성합니다.

public function pathImg(){
    $goods_id = '20'; //商品id
    //配置APPID、APPSECRET
    $APPID = "填写你的小程序appid"; 
    $APPSECRET =  "填写你的小程序APPSECRET"; 
    //获取access_token
    $access_token = "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=$APPID&secret=$APPSECRET";
    $json = $this->httpRequest($access_token);
       $json = json_decode($json,true); 
       $ACCESS_TOKEN = $json['access_token'];
       //如果要获取小程序码，请求这个接口
    $qcode ="https://api.weixin.qq.com/wxa/getwxacodeunlimit?access_token=$ACCESS_TOKEN";
    $param = json_encode(array("page"=>"pages/comm_details/comm_details","scene"=>$goods_id));
    //如果要获取二维码，请求这个接口
    // $qcode ="https://api.weixin.qq.com/cgi-bin/wxaapp/createwxaqrcode?access_token=$ACCESS_TOKEN";
    // $param = json_encode(array("path"=>"pages/comm_details/comm_details?goods_id=19","width"=> 150));
    //POST参数
    $result = $this->httpRequest($qcode, $param, "POST");
    //生成二维码
    file_put_contents("qrcode.png", $result); 
    //qrcode.png这个就是你生成的二维码图片,可以存到你指定的路径,例如:/update/img/qrcode.png
    $base64_image ="data:image/jpeg;base64,".base64_encode($result);
    echo $base64_image;
}
//curl请求
public function httpRequest($url, $data='', $method='GET'){
    $curl = curl_init();
    curl_setopt($curl, CURLOPT_URL, $url);
    curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, 0);
    curl_setopt($curl, CURLOPT_SSL_VERIFYHOST, 0);
    curl_setopt($curl, CURLOPT_USERAGENT, $_SERVER['HTTP_USER_AGENT']);
    curl_setopt($curl, CURLOPT_FOLLOWLOCATION, 1);
    curl_setopt($curl, CURLOPT_AUTOREFERER, 1);
    if($method=='POST'){
        curl_setopt($curl, CURLOPT_POST, 1);
        if ($data != ''){
            curl_setopt($curl, CURLOPT_POSTFIELDS, $data);
        }
       }
    curl_setopt($curl, CURLOPT_TIMEOUT, 30);
    curl_setopt($curl, CURLOPT_HEADER, 0);
    curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);
    $result = curl_exec($curl);
    curl_close($curl);
    return $result;
 }

Page({
    onLoad: function(options) {
        // options 中的 scene 需要使用 decodeURIComponent 才能获取到生成二维码时传入的 scene
        var scene = decodeURIComponent(options.scene)
        console.log(scene)
    }
})