                        课程
                    
                        /后端开发
                        
                            /PHP
                        
                        /PHP实现文件上传与下载

关于把$_FILES临时文件中的文件name放到$fileInfo中的问题

public function _construct($fileName='myFile',$maxSize=524880,$allowExt=array('jpeg','jpg','png','gif'),$allowMime=array('image/jpeg','image/png','image/gif'),$imgFlag=true,$uploadPath='./uploads'){

$this->fileName=$fileName;

$this->maxSize=$fileSize;

$this->allowExt=$allowExt;

$this->allowMime=$allowMime;

$this->imgFlag=$imgFlag;

$this->uploadPath=$uploadPath;

$this->fileInfo=$_FILES[$this->fileName];

}

上边是部分代码，都是按照老师教的写的，用$this->fileInfo=$_FILES[$this->fileName];把上传文件的名字“myFile”放到$this->fileInfo里，但实际我用var_dump($this->fileInfo)查看的时候却显示为NULL，同学们，能帮我解决下么? 十分感谢！！