PHP中的一个很好用的文件上传类
class FileUpload{
private $filepath; //设置上传文件的路径
private $allowtype=array('jpg','jpeg','gif','bmp'); //默认的文件的类型
private $maxsize=2000000; //默认文件的大小
private $israndname=true; //是否使用随机文件名
private $originName; //源文件名称
private $tmpFileName; //临时文件名
private $fileType; //文件类型
private $fileSize; //文件的大小
private $newFileName; //新文件的名称
private $errorNum; //错误号
private $errorMess=""; //用来提示错误报告
//用于文件初始化的函数
function __construct($options=array()){
foreach($options as $key=>$val){
$key=strtolower($key);//设置属性名称均为小写
//get_class_vars(get_class($this))
//获取当前类的所有的属性
if(!in_array($key,get_class_vars(get_class($this)))){
continue;
}
else
{
$this->setOption($key,$val);
}
}
}
//定义不同的错误级别
private function getError(){
$str="上传文件{$this->originName}时出错:";
switch($this->errorNum){
case 4:
$str.="文件没有被上传";
break;
case 3:
$str.="文件只有部分上传";
break;
case 2:
$str.="上传文件超过了HTML表单中规定的MAX_FILE_SIZE选项的值";
break;
case 1:
$str.="上传文件吵过了php.ini中upload_max_filesize选项的值";
break;
case -1:
$str.="未允许的类型";
break;
case -2:
$str.="上传文件过大,不能超过{$this->maxSize}个字节";
break;
case -3:
$str.="上传失败";
break;
case -4:
$str.="建立存放上传目录失败,请重新指定上传目录";
break;
case -5:
$str.="必须指定上传文件的路径";
break;
default:
$str.="未知的错误";
}
return $str."
";
}
//为成员属性赋值的函数
private function setOption($key,$val){
$this->$key=$val;
}
//用于检查上传文件的路径
private function checkFilePath(){
//如果文件路径为空
if(empty($this->filepath)){
$this->setOption('errorNum',-5);
return false;
}
//判断路径是否存在并且是否可写
if(!file_exists($this->filepath)||!is_writable($this->filepath)){
//@是错误抑制符 @ 是忽略错误提示,使其错
//误消息不会显示在程序里
if(!@mkdir($this->filepath,0755)){
$this->setOption('errorNum',-4);
return false;
}
}
return true;
}
//检查文件大小的函数
private function checkFileSize(){
if($this->fileSize>$this->maxsize){
$this->setOption("errorNum",-2);
return false;
}
else
{
return true;
}
}
//检查上传文件的类型
private function checkFileType(){
if(in_array(strtolower($this->fileType),$this->allowtype))
{
return true;
}
else
{
$this->setOption("errorNum",-1);
return false;
}
}
//上传一个文件
function uploadFile($fileField){
$return=true;
$name=$_FILES[$fileField]["name"]; //post提交的名称
$tmp_name=$_FILES[$fileField]["tmp_name"]; //上传时的临时文件名
$size=$_FILES[$fileField]["size"];
$error=$_FILES[$fileField]["error"];
if($this->setFiles($name,$tmp_name,$size,$error)){
if($this->checkFileSize() && $this->checkFileType()){
$this->setNewFileName();
if($this->copyFile())
{
$return=true;
}
else
{
$return=false;
}
}
else
{
$return=false;
}
}
else
{
$return=false;
}
//检查文件的路径是否存在错误
if(!$this->checkFilePath()){
$this->errorMess=$this->getError();
return false;
}
if(!$return)
{
$this->errorMess=$this->getError();
}
return $return;
}
//设置和$_FILES有关的内容
private function setFiles($name="",$tmp_name="",$size=0,$error=0){
$this->setOption("errorNum",$error);
if($this->errorNum){
return false;
}
$arrstr=explode(".",$name);
$this->setOption("fileType",strtolower($arrstr[count($arrstr)-1]));
$this->setOption("originName",$name);
$this->setOption("tmpFileName",$tmp_name);
$this->setOption("fileSize",$size);
return true;
}
//用于获取上传文件后文件的名称
function getNewFileName(){
return $this->newFileName.'上传成功!';
}
//上传文件失败时,显示错误信息的函数
function getErrorMsg(){
return $this->errorMess;
}
private function proRandName(){
$filename=date("YmdHis").rand(100,999);
return $filename.".".$this->fileType;
}
//设置上传后的文件名称
private function setNewFileName(){
if($this->israndname){
$this->setOption('newFileName',$this->proRandName());
}
else
{
$this->setOption('newFileName',$this->originName);
}
}
//拷贝文件
private function copyFile(){
if(!$this->errorNum){
$filepath=rtrim($this->filepath,'/')."/";
$filepath.=$this->newFileName;
//将文件拷贝到指定的路径当中
if(@move_uploaded_file($this->tmpFileName,$filepath)){
return true;
}
else
{
$this->setOption('errorNum',-3);
return false;
}
}
}
}
?>

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