php简单文件上传类

<?php

header("Content-Type:text/html; charset=utf-8");

if($_POST['submit']){

$upfiles = new Upload();

$upfiles->upload_file();

}

class Upload{

/*作者：mckee 来自：www.phpddt.com*/

public $upload_name; //上传文件名

public $upload_tmp_name; //上传临时文件名

public $upload_final_name; //上传文件的最终文件名

public $upload_target_dir; //文件被上传到的目标目录

public $upload_target_path; //文件被上传到的最终路径

public $upload_filetype ; //上传文件类型

public $allow_uploadedfile_type; //允许的上传文件类型

public $upload_file_size; //上传文件的大小

public $allow_uploaded_maxsize=10000000; //允许上传文件的最大值

//构造函数

public function __construct()

{

$this->upload_name = $_FILES["file"]["name"]; //取得上传文件名

$this->upload_filetype = $_FILES["file"]["type"];

$this->upload_tmp_name = $_FILES["file"]["tmp_name"];

$this->allow_uploadedfile_type = array('jpeg','jpg','png','gif','bmp','doc','zip','rar','txt','wps');

$this->upload_file_size = $_FILES["file"]["size"];

$this->upload_target_dir="./upload";

}

//文件上传

public function upload_file()

{

$upload_filetype = $this->getFileExt($this->upload_name);

if(in_array($upload_filetype,$this->allow_uploadedfile_type))

{

if($this->upload_file_size < $this->allow_uploaded_maxsize)

{

if(!is_dir($this->upload_target_dir))

{

mkdir($this->upload_target_dir);

chmod($this->upload_target_dir,0777);

}

$this->upload_final_name = date("YmdHis").rand(0,100).'.'.$upload_filetype;

$this->upload_target_path = $this->upload_target_dir."/".$this->upload_final_name;

if(!move_uploaded_file($this->upload_tmp_name,$this->upload_target_path))

echo "<font color=red>文件上传失败！</font>";

}

else

{

echo("<font color=red>文件太大,上传失败！</font>");

}

}

else

{

echo("不支持此文件类型，请重新选择");

}

}

/**

*获取文件扩展名

*@param String $filename 要获取文件名的文件

*/

public function getFileExt($filename){

$info = pathinfo($filename);

return $info["extension"];

}

}

?>

<form enctype="multipart/form-data" method="POST" action="">

<input type="file" name="file"><input type="submit" name="submit" value="上传">

</form>