标签:const 字体 extension user getc 设置 names 容错 evel
进入extend文件夹
composer require endroid/qrcode
2.将二维码生成封装为服务
QrcodeServer.php
代码如下:
<?php /** * Created by PhpStorm. * User: cdjyj21 * Date: 2018/9/4 * Time: 11:57 */ namespace app\services;
//引入刚刚添加的composer安装的类 里面的自动加载类
use think\facade\App;
require_once App::getRootPath().‘/extend/vendor/autoload.php‘;
use Endroid\QrCode\ErrorCorrectionLevel; use Endroid\QrCode\LabelAlignment; use Endroid\QrCode\QrCode; class QrcodeServer { 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 = ‘display‘; // display-直接显示 writefile-写入文件 protected $_file_name = ‘./static/qrcode‘; // 写入文件路径 const MARGIN = 10; // 二维码内容相对于整张图片的外边距 const WRITE_NAME = ‘png‘; // 写入文件的后缀名 const FOREGROUND_COLOR = [‘r‘ => 0, ‘g‘ => 0, ‘b‘ => 0, ‘a‘ => 0]; // 前景色 const BACKGROUND_COLOR = [‘r‘ => 255, ‘g‘ => 255, ‘b‘ => 255, ‘a‘ => 0]; // 背景色 public function __construct($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_name‘]) && $this->_file_name = $config[‘file_name‘]; } /** * 生成二维码 * @param $content //需要写入的内容 * @return array | page input */ public function createServer($content) { $this->_qr = new QrCode($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(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 $file_name = $this->_file_name; return $this->generateImg($file_name); } else { return [‘success‘ => false, ‘message‘ => ‘the generate type not found‘, ‘data‘ => ‘‘]; } } /** * 生成文件 * @param $file_name //目录文件 例: /tmp * @return array */ public function generateImg($file_name) { $file_path = $file_name . DIRECTORY_SEPARATOR . uniqid() . ‘.‘ . self::WRITE_NAME; if (!file_exists($file_name)) { mkdir($file_name, 0777, true); } try { $this->_qr->writeFile($file_path); $data = [ ‘url‘ => $file_path, ‘ext‘ => self::WRITE_NAME, ]; return [‘success‘ => true, ‘message‘ => ‘write qrimg success‘, ‘data‘ => $data]; } catch (\Exception $e) { return [‘success‘ => false, ‘message‘ => $e->getMessage(), ‘data‘ => ‘‘]; } } }
例:
<?php /** * Created by PhpStorm. * User: cdjyj21 * Date: 2018/9/4 * Time: 11:57 */ namespace app\test\controller; use app\services\QrcodeServer; class Qrcode { /** * 直接输出二维码 + 生成二维码图片文件 */ public function create(){ // 自定义二维码配置 $config = [ ‘title‘ => true, ‘title_content‘ => ‘test‘, ‘logo‘ => true, ‘logo_url‘ => ‘./logo.png‘, ‘logo_size‘ => 80, ]; // 直接输出 $qr_url = ‘http://www.baidu.com?id=‘ . rand(1000, 9999); $qr_code = new QrcodeServer($config); $qr_img = $qr_code->createServer($qr_url); echo $qr_img; // 写入文件 $qr_url = ‘这是个测试二维码‘; $file_name = ‘./static/qrcode‘; // 定义保存目录 $config[‘file_name‘] = $file_name; $config[‘generate‘] = ‘writefile‘; $qr_code = new QrcodeServer($config); $rs = $qr_code->createServer($qr_url); print_r($rs); exit; } }
在浏览器中直接访问create()
方法,会直接输出二维码,同时会在自定义保存目录下生成一张二维码图片。效果如下:
那这种直接输出的二维码怎么应用于项目中呢,一般都是直接写在html 中的 <img> 标签中,例如:
<img src="http://localhost:8080/projecttest/qrtest?id=1234" alt="这是一个二维码" />
这里罗列下我看懂的几个参数,也算给自己做个笔记吧。
参数名 | 描述 | 示例 |
---|---|---|
setText | 设置文本 | https://www.baidu.com |
setSize | 设置二维码的大小,这里二维码应该是正方形的,所以相当于长宽 | 400 |
setMargin | 设置二维码边距 | 10 |
setForegroundColor | 设置前景色,RGB颜色 | array(‘r‘ => 0, ‘g‘ => 0, ‘b‘ => 0, ‘a‘ => 0) |
setBackgroundColor | 设置背景色,RGB颜色 | array(‘r‘ => 0, ‘g‘ => 0, ‘b‘ => 0, ‘a‘ => 0) |
setEncoding | 设置编码 | utf8 |
setErrorCorrectionLevel | 设置错误级别(low / medium / quartile / high) | high |
setLogoPath | 设置logo路径 | logo.png |
setLogoWidth | 设置logo大小 | 50 |
setLabel | 设置标签 | test |
setLabelFontSize | 设置标签字体大小 | 16 |
setLabelFontPath | 设置标签字体路径 | null |
setLabelAlignment | 设置标签对齐方式(left / center / right) | center |
setLabelMargin | 设置标签边距 | array(‘t‘ => 10,‘r‘ => 20,‘b‘ => 10,‘l‘ => 30) |
setWriterRegistry | ||
setWriter | ||
setWriterByName | 写入文件的后缀名 | png |
setWriterByPath | ||
setWriterByExtension | ||
setValidateResult | ||
writeString | ||
writeDataUri | ||
writeFile | 写入文件 | test.png |
标签:const 字体 extension user getc 设置 names 容错 evel
原文地址:https://www.cnblogs.com/jasonLiu2018/p/12073148.html