NN2022081301/application/api/service/Qrcode.php

<?php


namespace app\api\service;

use Endroid\QrCode\ErrorCorrectionLevel;
use Endroid\QrCode\QrCode as QrCoder;
use think\facade\App;

class Qrcode
{
    protected $_qr;
    protected $_encoding = 'UTF-8';              // 编码类型
    protected $_size = 300;                  // 二维码大小
    protected $_logo = false;                // 是否需要带logo的二维码
    protected $_logo_url = '';                   // logo图片路径
    protected $_logo_size = 80;                   // logo大小
    protected $_title = false;                // 是否需要二维码title
    protected $_title_content = '';                   // title内容
    protected $_generate = 'writefile';            // display-直接显示  writefile-写入文件
    protected $_file_path = 'uploads/qrcode';   // 写入文件路径
    const MARGIN = 10;                        // 二维码内容相对于整张图片的外边距
    const WRITE_NAME = 'png';                     // 写入文件的后缀名
    const FOREGROUND_COLOR = ['r' => 0, 'g' => 0, 'b' => 0, 'a' => 0];          // 前景色
    const BACKGROUND_COLOR = ['r' => 255, 'g' => 255, 'b' => 255, 'a' => 0];    // 背景色

    /**
     * QrcodeServer constructor.
     * @param $config
     */
    public function __construct($config = [])
    {
        isset($config['generate']) && $this->_generate = $config['generate'];
        isset($config['encoding']) && $this->_encoding = $config['encoding'];
        isset($config['size']) && $this->_size = $config['size'];
        isset($config['logo']) && $this->_logo = $config['logo'];
        isset($config['logo_url']) && $this->_logo_url = $config['logo_url'];
        isset($config['logo_size']) && $this->_logo_size = $config['logo_size'];
        isset($config['title']) && $this->_title = $config['title'];
        isset($config['title_content']) && $this->_title_content = $config['title_content'];
        isset($config['file_path']) && $this->_file_path = $config['file_path'];
    }

    /**
     * 生成二维码
     * @param $content
     * @return array|string
     * @throws \Endroid\QrCode\Exception\InvalidPathException
     */
    public function createServer($content)
    {
        $this->_qr = new Qrcoder($content);
        $this->_qr->setSize($this->_size);
        $this->_qr->setWriterByName(self::WRITE_NAME);
        $this->_qr->setMargin(self::MARGIN);
        $this->_qr->setEncoding($this->_encoding);
        $this->_qr->setErrorCorrectionLevel(new ErrorCorrectionLevel(ErrorCorrectionLevel::HIGH));   // 容错率
        $this->_qr->setForegroundColor(self::FOREGROUND_COLOR);
        $this->_qr->setBackgroundColor(self::BACKGROUND_COLOR);
        // 是否需要title
        if ($this->_title) {
            $this->_qr->setLabel($this->_title_content, 16, null, LabelAlignment::CENTER);
        }
        // 是否需要logo
        if ($this->_logo) {
            $this->_qr->setLogoPath($this->_logo_url);
            $this->_qr->setLogoWidth($this->_logo_size);
        }
        $this->_qr->setValidateResult(false);
        if ($this->_generate == 'display') {
            // 展示二维码
            // 前端调用 例：<img src="http://localhost/qr.php?url=base64_url_string">
            header('Content-Type: ' . $this->_qr->getContentType());
            return $this->_qr->writeString();
        } else if ($this->_generate == 'writefile') {
            // 写入文件
            return $this->generateImg($this->_file_path);
        } else {
            return ['success' => false, 'message' => 'the generate type not found', 'data' => ''];
        }
    }

    /**
     * 生成文件
     *
     * @param $file_path
     * @return array
     */
    public function generateImg($file_path)
    {
        $file_name = uniqid() . '.' . self::WRITE_NAME;
        $save_path = App::getRootPath() . 'public/' . $file_path;
        if (!file_exists($save_path)) {
            mkdir($save_path, 0777, true);
        }
        try {
            $save_file = $save_path . '/' . $file_name;
            $this->_qr->writeFile($save_file);
            // 添加logo
            $logo = 'logo.png';//准备好的logo图片
            $QR = $save_file;//已经生成的原始二维码图
            if ($logo !== FALSE) {
                $QR = imagecreatefromstring(file_get_contents($QR));
                $logo = imagecreatefromstring(file_get_contents($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 / 5;
                $scale = $logo_width / $logo_qr_width;
                $logo_qr_height = $logo_height / $scale;
                $from_width = ($QR_width - $logo_qr_width) / 2;
                //重新组合图片并调整大小
                imagecopyresampled($QR, $logo, $from_width, $from_width, 0, 0, $logo_qr_width,
                    $logo_qr_height, $logo_width, $logo_height);
            }
            //输出图片
            imagepng($QR, $save_file);

            // 数据返回
            $data = [
                'url' => $file_path . '/' . $file_name,
                'ext' => self::WRITE_NAME,
            ];
            return ['success' => true, 'message' => 'write qrimg success', 'data' => $data];
        } catch (\Exception $e) {
            return ['success' => false, 'message' => $e->getMessage(), 'data' => ''];
        }
    }
}