php生成小程序码

作者：笔墨点赞次数：0 阅读次数：2616 分类：php 发布时间：2021-05-12 17:56:57

直接上代码

/**
     * 生成小程序二维码
     */
    public static function get_qrcode($path, $order)
    {
        $APPID = config('wechat.xcxappid');
        $APPSECRET = config('wechat.xcxappsecret');
        $config = [
            'appid'=> $APPID,
            'appsecret'=>$APPSECRET,
        ];
        $Wechat = new Wechat($config);
        $ACCESS_TOKEN =  $Wechat->checkAuth();//这一步自己获取ACCESS_TOKEN
        //构建请求二维码参数
        //path是扫描二维码跳转的小程序路径，可以带参数?id=xxx
        //width是二维码宽度
        $qcode = "https://api.weixin.qq.com/cgi-bin/wxaapp/createwxaqrcode?access_token=$ACCESS_TOKEN";
        $param = json_encode(array("path" => "pages/my/cost/record?$path", "width" => 150));
        //POST参数
        $result = self::httpRequest($qcode, $param, "POST");

$file_path = RUNTIME_PATH.'/qrcode' ;
        $file_name = "{$order}.png";
        try{
            if (!file_exists($file_path)) {
                mkdir($file_path, 0777, true);
            }
            //生成二维码
            file_put_contents($file_path . $file_name, $result);
            self::crop_img($file_path . $file_name);
            $logo =  ROOT_PATH."public/static/admin/img/logo.png";
            //将logo转为圆形
            $logo = self::changeAvatar($logo);
            //在二维码的中间区域镶嵌图片
            $img = self::makeOnePic($file_path . $file_name,$logo);
            $img_base64 = 'data:image/png;base64,' . base64_encode($img);//合成图片的base64编码
            @unlink($file_path . $file_name);
            return $img_base64;
        }catch(\Exception $e){
            @unlink($file_path . $file_name);
            return ['code'=>1,'msg'=>$e->getMessage()];
        }
    }

/**
     * 在二维码的中间区域镶嵌图片
     * @param $QR 二维码数据流。比如file_get_contents(imageurl)返回的东东,或者微信给返回的东东
     * @param $logo 中间显示图片的数据流。比如file_get_contents(imageurl)返回的东东
     * @return  返回图片数据流
     */
    public static function makeOnePic($QR,$logo){
        $QR   = imagecreatefromstring (file_get_contents($QR));
        $logo = imagecreatefromstring ($logo);
        $QR_width    = imagesx ( $QR );//二维码图片宽度
        $QR_height   = imagesy ( $QR );//二维码图片高度
        $logo_width  = imagesx ( $logo );//logo图片宽度
        $logo_height = imagesy ( $logo );//logo图片高度
        $logo_qr_width  = $QR_width / 3.5;//组合之后logo的宽度(占二维码的1/2.2)
        $scale  = $logo_width / $logo_qr_width;//logo的宽度缩放比(本身宽度/组合后的宽度)
        $logo_qr_height = $logo_height / $scale;//组合之后logo的高度
        $from_width = ($QR_width - $logo_qr_width) / 2;//组合之后logo左上角所在坐标点
        /**
         * 重新组合图片并调整大小
         * imagecopyresampled() 将一幅图像(源图象)中的一块正方形区域拷贝到另一个图像中
         */
        imagecopyresampled ( $QR, $logo, $from_width, $from_width, 0, 0, $logo_qr_width, $logo_qr_height, $logo_width, $logo_height );
        /**
         * 如果想要直接输出图片，应该先设header。header("Content-Type: image/png; charset=utf-8");
         * 并且去掉缓存区函数
         */
        //获取输出缓存，否则imagepng会把图片输出到浏览器
        ob_start();
        imagepng ( $QR );
        imagedestroy($QR);
        imagedestroy($logo);
        $contents =  ob_get_contents();
        ob_end_clean();
        return $contents;
    }

public static  function changeAvatar($avatar)
    {
        //处理用户头像为圆形icon
        $avatar = imagecreatefromstring(file_get_contents($avatar));
        $w = imagesx($avatar);
        $h = imagesy($avatar);
        $w = min($w, $h);
        $h = $w;

$img = imagecreatetruecolor($w, $h);
        imagesavealpha($img, true);
        $bg = imagecolorallocatealpha($img, 255, 255, 255, 127);
        imagefill($img, 0, 0, $bg);

$r = $w / 2; //圆半径
        $y_x = $r; //圆心X坐标
        $y_y = $r; //圆心Y坐标
        for ($x = 0; $x < $w; $x++) {
            for ($y = 0; $y < $h; $y++) {
                $rgbColor = imagecolorat($avatar, $x, $y);

if (((($x - $r) * ($x - $r) + ($y - $r) * ($y - $r)) < ($r * $r))) {
                    imagesetpixel($img, $x, $y, $rgbColor);
                }
            }
        }

ob_start();
        imagepng($img);
        imagedestroy($img);
        imagedestroy($avatar);
        $contents = ob_get_contents();
        ob_end_clean();  //清空缓存区

return $contents;
    }

/**
     * Notes:截取图片
     * User: bimo
     * Date: 2020/11/12
     * Time: 14:03
     * @param $path
     */
    public static function crop_img($path)
    {
        $image = \think\Image::open($path);
        // 返回图片的宽度
        $width = $image->width();
        $height = $image->height();

$image->crop($width, $height - 50)->save($path);//将图片裁剪为300x300并保存为crop.png
    }

//把请求发送到微信服务器换取二维码
    public static 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;
    }

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