- 安装扩展
由于YII框架有composer，应付个小小的二维码，不成问题。（如果还不知道composer，请自行查阅点击打开链接），我们只要运行命令行
composer require 2amigos/yii2-qrcode-helper
或者在 composer.json 中添加 2amigos/yii2-qrcode-helper
按步骤安装即可。安装完成后进行下一步。 2.代码参考
代码语言：javascript复制<?php
namespace commonlib;
use DaQrCodeContractsErrorCorrectionLevelInterface;
use DaQrCodeExceptionInvalidPathException;
use DaQrCodeQrCode;
use Yii;
class QrCodeLib
{
/**
* 获取二维码
* @param string $content
* @param int $size
* @return void
*/
public static function getQrCode($content = '', $size = 300)
{
header('Content-Type: image/png');//解决输出乱码
$qrCode = new QrCode($content);
$qrCode->setSize($size);
$code = $qrCode->writestring();
exit($code);
}
/**
* 获取带logo的二维码
* @param string $content
* @param string $logoAddress 入口web下的文件
* @param int $size
* @param int $margin
* @param int $logoWidth
* @return void
*/
public static function getQrCodeWithLogo($content = '', $logoAddress = '', $size = 300, $margin = 5, $logoWidth = 65)
{
header('Content-Type: image/png');//防止乱码
try {
$code = (new QrCode($content, ErrorCorrectionLevelInterface::HIGH))
->useLogo($logoAddress)
->useEncoding('UTF-8')
->setSize($size)
->setMargin($margin)
->setLogoWidth($logoWidth)
->writestring();
exit($code);
} catch (InvalidPathException $e) {
print_r('生成二维码失败' . $e->getMessage());
}
}
/**
* 获取二维码base64
* @param string $content
* @param int $size
* @return void
*/
public static function getQrCodeBase64($content = '', $size = 300) {
$qrCode = new QrCode($content);
$qrCode->setSize($size);
$code = $qrCode->writestring();
//使用base64_encode变成编码字符串
$imageString = base64_encode($code);
return json_encode(['png'=>'data:image/png;base64,' . $imageString]);
//如果直接输出，用exit
// exit();
}
/**
* 上传到oss
* @param string $content
* @param int $size
* @param string $path
* @param string $type
* @return bool|string
*/
public static function getQrCodeUploadOss($content = '', $size = 300, $path = './', $type = 'png') {
$qrCode = new QrCode($content);
$qrCode->setSize($size);
$code = $qrCode->writestring();
//使用base64_encode变成编码字符串
$imageString = base64_encode($code);
if (!is_dir($path)) {
//检查是否有该文件夹，如果没有就创建，并给予最高权限
mkdir($path, 0777,true);
}
$keyName = date('Ymd'). md5(uniqid(microtime(true),true)) . "_".rand(100,9999) . ".{$type}";
$ossUrl = Yii::$app->params['environment'] . '/****/' . date('Ym') . '/' . date('md') . '/' . $keyName;
$newFile = $path . $keyName;
if (file_put_contents($newFile, base64_decode($imageString))){
$objOss= new Aliyunoss();
if($objOss::upFile($keyName, $ossUrl, $objOss::HASH_KEY_PIC )){
unlink($newFile);
return $objOss::readFile(Aliyunoss::HASH_KEY_PIC, $ossUrl, 36000);
} else {
unlink($newFile);
return false;
}
}else{
}
}
}
