yii2文件上传

//模型
<?phpnamespace backend\models;use Yii;use yii\web\UploadedFile;class UploalModel extends \yii\db\ActiveRecord{ ???/** ????* @var UploadedFile|Null file attribute ????*/ ???public $file; ???/** ????* @return array the validation rules. ????*/ ???public function rules() ???{ ???????return [ ???????????[["file"], "file",], ???????]; ???} ???/**公共上传 上传信息(数组) 文件名称 大小 后缀名限制 上传后保存的名字 update时为更新图片 删除原有图片*/ ???public function upload($img,$name = ‘/vessel‘,$siez = ‘‘,$arr_type = ‘‘,$text_name = ‘‘,$act=‘update‘,$url=‘/vessel/20180831/153571385083726.jpg‘) ???{ ???????$path = ‘../..‘; ???????$dirname = $path.$name; ???????$fill=$this->file->extension;//图片的名字只取后缀名 ???????if(empty($text_name)){ ???????????$ran=time().rand(10000,99999);//随机名字 ???????}else{$ran = $text_name;} ???????$arr = $arr_type; ???????if(!empty($arr)){ ???????????if(!in_array($fill,$arr)){ return json_encode(‘格式不正确‘);} ???????} ???????//定义上传大小和类型 ???????if(!empty($siez)){ ???????????if($img[‘size‘]>$siez) {return json_encode(‘文件大小超过限制‘);} ???????} ???????//文件上传存放的目录 ???????$dir=$dirname.‘/‘.date("Ymd"); ???????$dir_sev=$name.‘/‘.date("Ymd");/*数据库存储路径*/ ???????if(!file_exists($dir)) { ???????????mkdir($dir,0777,true); ???????} ???????if ($this->validate()) { ???????????//文件名 ???????????$fileName = $ran .‘.‘.$fill; ???????????$dir = $dir."/". $fileName; ???????????if($act == ‘update‘){if($this->file->saveAs($dir)){@unlink($path.$url);}}/*删除图片*/ ???????????$uploadSuccessPath = $dir_sev."/". $fileName;/*最后路径*/ ???????????return $uploadSuccessPath; ???????} ???}}

//控制器
<?phpnamespace backend\controllers;use Yii;use backend\models\UploalModel;use yii\web\UploadedFile;class TestController extends \yii\web\Controller{ ???/** ????* ???文件上传 ????* ?我们这里上传成功后把图片的地址进行返回 ????*/ ???public function actionIndex () ???{ ???????$model = new UploalModel(); ???????$uploadSuccessPath = ""; ???????if (Yii::$app->request->isPost) { ???????????$model->file = UploadedFile::getInstance($model, "file"); ???????????$file = $model->upload((array)$model->file); ???????????return $file; ???????} ???????return $this->render("index", [ ???????????"model" => $model, ???????????"uploadSuccessPath" => $uploadSuccessPath, ???????]); ???}}

//视图
<?phpuse yii\widgets\ActiveForm;$form = ActiveForm::begin(["options" => ["enctype" => "multipart/form-data"]]);?> ???<input type="hidden" name="UploalModel[file]" value=""> ???<input type="file" id="uploalmodel-file" name="UploalModel[file]"> ???<button>Submit</button><?php ActiveForm::end(); ?>