本文实例讲述了php文件上传类。分享给大家供大家参考，具体如下：

/**

$file=new class_file($file_array,"flash/");

$file->set_allow_type(array("jpg","jpeg","gif"));

$file->is_limit_size();

if(!$file->allow_file_size()){

echo $file->error;

exit;

}

if(!$file->allow_file_type()){

echo $file->error;

exit();

}else if(!$file->uploadfile()){

echo $file->error;

exit;

}

**/

class class_file{

private $file_type;

private $file_size;

private $save_path;

private $file_path;

private $allow_type=array();

private $allow_size;

private $file_name;

private $flag=false;

private $mime_type;

private $is_limit_size=false;

public $error;

//构造函数

function class_file($file_array,$save_path){

$this->file_path=$file_array['tmp_name'];

$this->file_size=$file_array['size'];

$this->file_type=$file_array['type'];

$this->save_path=$save_path;

}

//设置允许的文件类型

function set_allow_type($allow_type){

$this->allow_type=$allow_type;

}

//设置允许的文件大小

function set_allow_size($allow_size){

$this->allow_size=$allow_size;

}

//文件上传

public function uploadfile(){

if(!$this->allow_file_type()){

$this->file_name();

}

if(move_uploaded_file($this->file_path,$this->save_path.$this->file_name)){

return true;

}else{

$this->error="文件上传失败";

return;

}

}

//判断文件上传的类型

function allow_file_type(){

$this->file_name();

if(in_array($this->mime_type,$this->allow_type)){

return true;

}else{

$this->error="不允许上传的类型";

exit();

}

}

//判断文件上传的大小

function allow_file_size($size=100){

if($this->is_limit_size){

$this->set_allow_size($size);

if($this->allow_size>=$this->file_size){

return true;

}else{

$this->error="超过文件上传大小限制";

}

}

}

//是否限制文件大小

function is_limit_size(){

$this->is_limit_size=true;

}

//文件类型和文件名称

function file_name(){

$this->mime_type=substr($this->file_type,strpos($this->file_type,"/")+1);

if($this->mime_type=="pjpeg"){

$this->mime_type="jpg";

}

if($this->mime_type=="x-ms-wma"){

$this->mime_type="wma";

}

if($this->mime_type=="x-ms-wmv"){

$this->mime_type="wmv";

}

$this->file_name=date("YmdHis").".$this->mime_type";

}

function _get_file_name(){

return $this->file_name;

}

}

?>

希望本文所述对大家PHP程序设计有所帮助。