laravel 生成底部带编号的微信小程序二维码

生成底部带编号的二维码如下图所示：

具体实现代码如下：

<?php

namespace AppHttpControllersApi;

use AppModelsOrderGoods;
use IlluminateFoundationApplication;
use IlluminateHttpRequest;
use AppUtilsCodeUtil;
use AppModelsOrder;
use AppServicesOtherJSSDK;
use IlluminateSupportFacadesArtisan;

class OrderController extends CommonController
{
    public function test()
    {
        $product_sn = '123456-1';
        $new_order_goods_id = 1;
        $qrcode = self::makeMergerImg($product_sn,$new_order_goods_id);
    }
    
    //生成带编号说明的二维码 (生成二维码  文字生成图片 图片合并拼接)
    public static function makeMergerImg($sn_product,$new_order_goods_id){
        
        self::getQrcode($new_order_goods_id, 'pages/order-detail/order-detail');
        
        self::makeImgWithStr('upload/sn_str_img/'.$sn_product.'.jpg',$sn_product,18);
        self::CompositeImage(['upload/qrcode/qrcode_'.$new_order_goods_id.'.jpg','upload/sn_str_img/'.$sn_product.'.jpg'],'upload/pin_code/'.$sn_product.'.jpg','y','jpg');
        unlink('upload/sn_str_img/'.$sn_product.'.jpg');
        return '/upload/pin_code/'.$sn_product.'.jpg';
    } 

    /**
     * 获取小程序二维码
     * @param int $order_id 订单ID
     * @param varchar $samll_program_url 要跳转的路径（小程序路径）
     */
    protected static function getQrcode($order_id, $samll_program_url)
    {

        $filename = "qrcode_" . $order_id . ".jpg";//要生成的图片名字
        $base_path = base_path() . "/public";
        $IMG_PATH = '/upload/qrcode';//保存服务器路径
        $shop_url = config('app.url');//网址
        if (file_exists('.' . $IMG_PATH . '/' . $filename)) { //存在返回图片路径
            return $shop_url . $IMG_PATH . '/' . $filename;
        }

        $jssdk = new JSSDK(config('wechat.xcx_app_id'), config('wechat.secret'));
        $access_token = $jssdk->getAccessTokenMinProgram();
        $scene = $order_id;
        $data = '{"scene":"' . $scene . '","page":"' . $samll_program_url . '","width":280}';
        $jpg = self::posturl('https://api.weixin.qq.com/wxa/getwxacodeunlimit?access_token=' . $access_token, $data);//二进制原始数据
        $res = file_put_contents($base_path . $IMG_PATH . '/' . $filename, $jpg);

        return $IMG_PATH . '/' . $filename;
    }
    
    
    //文字生成图片
    public static function makeImgWithStr($filename, $text, $font_size=16,$font = '/font/Arial/Arial.ttf')
    {
        //图片尺寸
        $im = imagecreatetruecolor(280, 70);
        //背景色
        $white = imagecolorallocate($im, 255, 255, 255);
        //字体颜色
        $black = imagecolorallocate($im, 0, 0, 0);

        imagefilledrectangle($im, 0, 0, 280, 300, $white);
        $txt_max_width = intval(0.8 * 280);
        $content = "";
        for ($i = 0; $i < mb_strlen($text); $i++) {
            $letter[] = mb_substr($text, $i, 1);
        }
        foreach ($letter as $l) {
            $test_str = $content . " " . $l;
            $test_box = imagettfbbox($font_size, 0, $font, $test_str);
            // 判断拼接后的字符串是否超过预设的宽度。超出宽度添加换行
            if (($test_box[2] > $txt_max_width) && ($content !== "")) {
                $content .= "
";
            }
            $content .= $l;
        }

        $txt_width = $test_box[2] - $test_box[0];

        $y = 70 * 0.5; // 文字从何处的高度开始
        $x = (280 - $txt_width) / 2; //文字居中
        // echo $x;die;
        //文字写入
        imagettftext($im, $font_size, 0, $x, $y, $black, $font, $content); //写 TTF 文字到图中
        //图片保存
        imagejpeg($im, $filename);
    }
    
    /**
     * 合并图片,拼接合并
     * @param array $image_path 需要合成的图片数组
     * @param $save_path 合成后图片保存路径
     * @param string $axis 合成方向
     * @param string $save_type 合成后图片保存类型
     * @return bool|array
     */
    public static function CompositeImage(array $image_path, $save_path, $axis = 'y', $save_type = 'png')
    {
        if (count($image_path) < 2) {
            return false;
        }
        //定义一个图片对象数组
        $image_obj = [];
        //获取图片信息
        $width = 0;
        $height = 0;
        foreach ($image_path as $k => $v) {
            $pic_info = getimagesize($v);
            list($mime, $type) = explode('/', $pic_info['mime']);
            //获取宽高度
            $width += $pic_info[0];
            $height += $pic_info[1];
            if ($type == 'jpeg') {
                $image_obj[] = imagecreatefromjpeg($v);
            } elseif ($type == 'png') {
                $image_obj[] = imagecreatefrompng($v);
            } else {
                $image_obj[] = imagecreatefromgif($v);
            }
        }
        //按轴生成画布方向
        if ($axis == 'x') {
            //TODO X轴无缝合成时请保证所有图片高度相同
            $img = imageCreatetruecolor($width, imagesy($image_obj[0]));
        } else {
            //TODO Y轴无缝合成时请保证所有图片宽度相同
            $img = imageCreatetruecolor(imagesx($image_obj[0]), $height);
        }
        //创建画布颜色
        $color = imagecolorallocate($img, 255, 255, 255);
        imagefill($image_obj[0], 0, 0, $color);
        //创建画布
        imageColorTransparent($img, $color);
        imagecopyresampled($img, $image_obj[0], 0, 0, 0, 0, imagesx($image_obj[0]), imagesy($image_obj[0]), imagesx($image_obj[0]), imagesy($image_obj[0]));
        $yx = imagesx($image_obj[0]);
        $x = 0;
        $yy = imagesy($image_obj[0]);
        $y = 0;
        //循环生成图片
        for ($i = 1; $i <= count($image_obj) - 1; $i++) {
            if ($axis == 'x') {
                $x = $x + $yx;
                imagecopymerge($img, $image_obj[$i], $x, 0, 0, 0, imagesx($image_obj[$i]), imagesy($image_obj[$i]), 100);
            } else {
                $y = $y + $yy;
                imagecopymerge($img, $image_obj[$i], 0, $y, 0, 0, imagesx($image_obj[$i]), imagesy($image_obj[$i]), 100);
            }
        }
        //设置合成后图片保存类型
        if ($save_type == 'png') {
            imagepng($img, $save_path);
        } elseif ($save_type == 'jpg' || $save_type == 'jpeg') {
            imagejpeg($img, $save_path);
        } else {
            imagegif($img, $save_path);
        }
        return true;
    }
    /* 图片等宽处理 */
    public static function ImgCompress($src, $out_with = 150)
    {
        // 获取图片基本信息
        list($width, $height, $type, $attr) = getimagesize($src);
        // 获取图片后缀名
        $pic_type = image_type_to_extension($type, false);
        // 拼接方法
        $imagecreatefrom = "imagecreatefrom" . $pic_type;
        // 打开传入的图片
        $in_pic = $imagecreatefrom($src);
        // 压缩后的图片长宽
        $new_width = $out_with;
        $new_height = $out_with / $width * $height;
        // 生成中间图片
        $temp = imagecreatetruecolor($new_width, $new_height);
        // 图片按比例合并在一起。
        imagecopyresampled($temp, $in_pic, 0, 0, 0, 0, $new_width, $new_height, $width, $height);
        // 销毁输入图片
        imagejpeg($temp, 'upload/merge' . time() . ".jpg");
        imagedestroy($in_pic);
        return array($temp, $new_width, $new_height);

    }
    

    public static function posturl($url, $data)
    {
        $headerArray = array("Content-type:application/json;charset='utf-8'", "Accept:application/json");
        $curl = curl_init();
        curl_setopt($curl, CURLOPT_URL, $url);
        curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, FALSE);
        curl_setopt($curl, CURLOPT_SSL_VERIFYHOST, FALSE);
        curl_setopt($curl, CURLOPT_POST, 1);
        curl_setopt($curl, CURLOPT_POSTFIELDS, $data);
        curl_setopt($curl, CURLOPT_HTTPHEADER, $headerArray);
        curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);
        $output = curl_exec($curl);
        curl_close($curl);
        return $output;
    }
}