//文件上传类(功能)
class FileUpload{
protected $upfile;
protected $path;
protected $error;
protected $fileinfo;
protected $typelist=array();
protected $maxsize=0;
public function __construct($name,$path){
$this->upfile=$_FILES[$name];
$this->path=rtrim($path,"/")."/";
}
public function __set($param,$value){
$this->$param=$value;
}
public function __get($param){
return $this->$param;
}
//验证上传的错误号
private function checkError(){
if($this->upfile['error']>0){
switch($this->upfile['error']){
case 1: $info="上传文件大小超出PHP配置文件的设置"; break;
case 2: $info="上传文件大小超过了表单中MAX_FILE_SIZE指定的值"; break;
case 3: $info="文件只有部分被上传。"; break;
case 4: $info="没有文件被上传。"; break;
case 6: $info="找不到临时文件夹。"; break;
case 7: $info="文件写入失败。"; break;
default: $info="未知错误"; break;
}
$this->error=$info;
return false;
}
return true;
}
//验证上传类型
private function checkType(){
if(count($this->typelist)>0){
if(!in_array($this->upfile['type'],$this->typelist)){
$this->error="上传文件类型错误：".$upfile['type'];
return false;
}
}
return true;
}
//验证大小
private function checkSize(){
if($this->maxsize>0 && $this->upfile['size']>$this->maxsize){
$this->error="上传文件大小超出了允许范围！".$maxsize;
return false;
}
return true;
}
//处理上传的文件名
private function makeName(){
do{
//随机一个文件名，格式：时间戳+4位随机数+源后缀名
$newname = time().rand(1000,9999).".".pathinfo($this->upfile['name'],PATHINFO_EXTENSION);
}while(file_exists($this->path.$newname)); //判断随机的文件名是否存在。
$this->fileinfo['savename']=$newname;
return true;
}
//移动上传文件
private function movefile(){
if(is_uploaded_file($this->upfile['tmp_name'])){
if(move_uploaded_file($this->upfile['tmp_name'],$this->path.$this->fileinfo['savename'])){
return true;
}else{
$this->error='执行上传文件移动失败！';
}
}else{
$this->error='不是一个有效的上传文件！';
}
return false;
}
//执行上传
public function upload(){
return ($this->checkError() && $this->checkType() && $this->checkSize() && $this->makeName() && $this->movefile());
}
}
