php上传文件类

[PHP]代码  

<?php

	class upload
	{
		var $upload_name;					//上传文件名
		var $upload_tmp_name;				//上传临时文件名
		var $upload_final_name;				//上传文件的最终文件名
		var $upload_target_dir;				//文件被上传到的目标目录
		var $upload_target_path;			//文件被上传到的最终路径
		var $upload_filetype ;				//上传文件类型
		var $allow_uploadedfile_type;		//允许的上传文件类型
		var $upload_file_size;				//上传文件的大小
		var $allow_uploaded_maxsize=5000; 	//允许上传文件的最大值
		var $image_w=900; 					//要显示图片的宽
		var $image_h=350; 					//要显示图片的高

		function __construct()
		{
			$this->upload_name = $_FILES["file"]["name"]; //取得上传文件名
			$this->upload_filetype = $_FILES["file"]["type"];
			$this->upload_final_name = date("Y-m-d H:i:s").$this->upload_name;
			$this->upload_tmp_name = $_FILES["file"]["tmp_name"];
			$this->allow_uploadedfile_type = array("image/gif","image/jpeg");
			$this->upload_file_size = $_FILES["file"]["size"];
			$this->upload_target_dir="./upload";
		}

		function upload_file()
		{
			if(in_array($this->upload_filetype,$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);
					}
					$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");
			}
		}

	}

?>