致命错误: Class 'Endroid\QrCode\QrCode' not found 二维码包找不到
致命错误: Class 'Endroid\QrCode\QrCode' not found
原因:没有安装二维码包
1. 使用 composer 安装 endroid/qrcode:
composer require endroid/qrcode
2.将二维码生成封装为服务
![](http://upload-images.jianshu.io/upload_images/12218344-86142bdb7c74c038.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/283/format/webp)
image.png
QrcodeServer.php
代码如下:
<?php
/**
* Created by PhpStorm.
* User: cdjyj21
* Date: 2018/9/4
* Time: 11:57
*/
namespace app\services;
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' => ''];
}
}
}
3.调用
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:
![](http://upload-images.jianshu.io/upload_images/12218344-46f6d6ed4d9829cc.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1000/format/webp)
image.png
![](http://upload-images.jianshu.io/upload_images/12218344-5dda1c70d944bf01.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/403/format/webp)
image.png