mgc.longyilive.com/controllers/UploadController.php

<?php

namespace app\controllers;

use Yii;
use yii\web\UploadedFile;
use yii\web\Controller;
use yii\web\NotFoundHttpException;
use yii\filters\VerbFilter;
use PhpOffice\PhpSpreadsheet\IOFactory;
use app\models\LoginForm;
use app\models\UploadImg;
use yii\web\Response;

class UploadController extends Controller
{
    public function actionImg(){
        try {
            Yii::$app->response->format = Response::FORMAT_JSON;
            $model = new UploadImg();
            $model->file = UploadedFile::getInstanceByName('file');
            if (!$model->file) {
                return false;
            }
            $info = $model->upload();
            if ($info && is_array($info)) {
                return $info;
            } else {
                return ['code' => 1, 'msg' => 'error'];
            }
        } catch (\Exception $e) {
            return ['code' => 1, 'msg' => $e->getMessage()];
        }

    }
   
}