YII2文件上传验证，简单封装

上传使用FileInput插件
官方文档 http://demos.krajee.com/widge...
也参考了 http://www.manks.top/yii2_mul...
插件参数比较多。前台表单部分，能够参照具体例子写就好了。

主要是上传以后的处理和验证,验证文件的类型，大小等，我写了一个公共方法来处理上传

/**
     * 文件上传
     * ```
     *  $model = new UploadValidate($config_name);
     *  $result = CommonHelper::myUpload($model, $field, 'invoice');
     * ```
     *
     * @param  object $model \common\models\UploadValidate 验证上传文件
     * @param  string $field 上传字段名称
     * @param  string $path  文件保存路径
     *
     * @return bool|array
     */
    public static function myUpload($model, $field, $path = '')
    {
        $upload_path = \Yii::$app->params['upload_path'];
        $path = $path ? $path . "/" : '';
        if (\Yii::$app->request->isPost) {
            $file = UploadedFile::getInstanceByName($field);
            $model->file = $file;
            //文件上传存放的目录
            $dir = $upload_path . $path . date("Ymd");
            if ( !is_dir($dir)) {
                mkdir($dir, 0777, true);
                chmod($dir, 0777);
            }
            if ($model->validate()) {
                //生成文件名
                $rand_name = rand(1000, 9999);
                $fileName = date("YmdHis") . $rand_name . '_' . $model->file->baseName . "." . $model->file->extension;
                $save_dir = $dir . "/" . $fileName;
                $model->file->saveAs($save_dir);
                $uploadSuccessPath = $path . date("Ymd") . "/" . $fileName;
                $result['file_name'] = $model->file->baseName;
                $result['file_path'] = $uploadSuccessPath;
            } else {
                //上传失败记录日志
                self::recordLog($model->errors, $field, 'Upload');
                
                return false;
            }
        } else {
            return false;
        }

验证的model类,参数没有写那么多，能够把须要的参数都加上，每一个项目或者模块须要用到上传的时候，在配置文件params里配置上相关的参数就能够了

<?php

namespace common\models;

use yii\base\Model;

/**
 * Class UploadValidate 文件上传验证
 * 使用model验证文件上传字段
 * ```
 * $model = new UploadValidate($config_name);
 * ```
 *
 * @package common\models
 * @author  windhoney
 * @package common\models
 */
class UploadValidate extends Model
{
    
    /**
     * @var string 表单字段名
     */
    public $file;
    /**
     * @var array|string 扩展名
     */
    public $extensions;
    /**
     * @var int 文件大小 最大值  单位字节
     */
    public $max_size = 60 * 1024 * 1024;
    /**
     * @var int 文件大小 最小值  单位字节
     */
    public $min_size = 1;
    /**
     * @var array|string  MIME TYPE
     */
    public $mime_type;
    /**
     * @var string 上传失败后返回信息
     */
    public $message = '上传失败';
    
    /**
     * UploadValidate constructor.
     *
     * @param string $config_name `@app/config/params.php` 文件上传验证配置项名称
     */
    public function __construct($config_name)
    {
        parent::__construct();
        $upload_config = \Yii::$app->params[$config_name];
        $this->extensions = $upload_config['extensions']??'';
        $this->mime_type = $upload_config['mime_types']??'';
        $this->max_size = $upload_config['max_size']??'';
        $this->min_size = $upload_config['min_size']??'';
        $this->message = $upload_config['message']??'';
    }
    
    /**
     * @inheritdoc 验证规则
     */
    public function rules()
    {
        $file_rule = [['file'], 'file'];
        if ($this->extensions) {
            $file_rule['extensions'] = $this->extensions;
        }
        if ($this->mime_type) {
            $file_rule['mimeTypes'] = $this->mime_type;
        }
        if ($this->max_size) {
            $file_rule['maxSize'] = $this->max_size;
        }
        if ($this->min_size) {
            $file_rule['minSize'] = $this->min_size;
        }
        if ($this->message) {
            $file_rule['message'] = $this->message;
        }
        $rules = [$file_rule];
        
        return $rules;
    }
}

配置文件 @app/config/params.php

<?php
return [
    'test_upload' => [
        'extensions' => ['jpg', 'png', 'jpeg', 'jpe', 'pdf'],
        'mime_types' => ['image/*', 'application/pdf'],
        'max_size' => 10 * 1024 * 1024,
        'min_size' => 1,
        'message' => '上传失败',
    ]
];

使用步骤

//实例化上传验证类，传入上传配置参数项名称
  $model = new UploadValidate('test_upload');
  //上传
  $result = CommonHelper::myUpload($model, $field, 'test');