<?php
declare (strict_types = 1);namespace app\index\validate;use think\Validate;class Upload extends Validate
{/*** 定义验证规则* 格式：'字段名' => ['规则1','规则2'...]** @var array*/protected $rule = ['image' => 'fileExt:jpg,png|fileSize:204800|fileMime:image/jpeg,image/png', // 文件扩展名限制为jpg, png；文件大小限制为200K；文件MIME类型限制为image/jpeg, image/png];/*** 定义错误信息* 格式：'字段名.规则名' => '错误信息'** @var array*/protected $message = ['image.fileExt' => '图片格式必须为jpg或png','image.fileSize' => '图片大小不能超过200K',];
}
在index应用下，创建了验证器；
<?php
declare (strict_types = 1);namespace app\index\controller;use think\Request;
use app\index\validate\Upload as ValidateUpload;
use think\facade\Filesystem as Fs;
class Upload
{public function index(){return view('/upload');}public function upload(Request $request){$file = $request->file('file');$validate = new ValidateUpload();if (!$validate->check(['image' => $file])) {return json(['code' => 1, 'msg' => $validate->getError()]);}$savename = Fs::disk('public')->putFile('', $file);// 确保路径使用正斜杠$savename = str_replace('\\', '/', $savename);return json(['code' => 0, 'msg' => '上传成功', 'data' => ['url' => '/storage/' . $savename]]);}
}
index应用下，创建了index控制器，upload方法处理了来自前端的ajax上传；
<!DOCTYPE html>
<html>
<head><meta charset="utf-8"><meta name="viewport" content="width=device-width, initial-scale=1"><title>Demo</title><!-- 请勿在项目正式环境中引用该 layui.css 地址 --><link href="//unpkg.com/layui@2.9.14/dist/css/layui.css" rel="stylesheet">
</head>
<body>
<div class="layui-upload-drag" style="display: block;" id="ID-upload-demo-drag"><i class="layui-icon layui-icon-upload"></i> <div>点击上传，或将文件拖拽到此处</div><div class="layui-hide" id="ID-upload-demo-preview"><hr> <img src="" title="上传成功后渲染" style="max-width: 100%"></div>
</div><!-- 请勿在项目正式环境中引用该 layui.js 地址 -->
<script src="//unpkg.com/layui@2.9.14/dist/layui.js"></script>
<script>
layui.use(function(){var upload = layui.upload;var $ = layui.$;// 渲染upload.render({elem: '#ID-upload-demo-drag',url: '/index/upload/upload/', // 实际使用时改成您自己的上传接口即可。accept: 'images', // 指定允许上传的文件类型exts: 'jpg|png', // 允许上传的文件后缀，不带点，多个用|分割，如果需要所有类型则把整个MIME类型写上，如image/*'done: function(res){if(res.code != 0){return layer.msg(res.msg);} else {layer.msg('上传成功');$('#ID-upload-demo-preview').removeClass('layui-hide').find('img').prop('src', res.data.url);console.log(res);}}});
});
</script></body>
</html>这是layui上传图片的前端示例代码；
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