上传文件

<?php
class Test_Upload{

	protected $_uploaded = array();
	protected $_destination;	
	protected $_max = 1024000;
	protected $_messages = array();
	protected $_permited = array(
								'image/gif',
								'image/jpeg',
								'image/pjpeg',
								'image/png'		
	);
	protected $_renamed = false;
	
	/**
	 * 
	 * @param mix $path
	 * 
	 */
	public function __construct($path){
		
		if (!is_dir($path) || !is_writable($path)){
			throw new Exception("文件名不可写，或者不是目录！");
		}
		$this->_destination = $path;
		$this->_uploaded = $_FILES;
	}
	/**
	 * 移动文件
	 * 
	 */
	public function move(){
		
		$filed = current($this->_uploaded);	
			
		$isOk = $this->checkError($filed['name'], $filed['error']);
		//debug ok
		if ($isOk){
			$sizeOk = $this->checkSize($filed['name'], $filed['size']);
			$typeOk = $this->checkType($filed['name'], $filed['type']);
			if ($sizeOk && $typeOk){
				
				$success = move_uploaded_file($filed['tmp_name'], $this->_destination.$filed['name']);
				
				if ($success){
					$this->_messages[] = $filed['name']."文件上传成功";
				}else {
					$this->_messages[] = $filed['name']."文件上传失败";
				}
			}
			
		}
	}
	/**
	 * 查询messages数组内容 
	 *
	 */
	public function getMessages(){
		return $this->_messages;
	}
	
	/**
	 *  检测上传的文件大小
	 *  @param mix $string
	 *  @param int $size
	 */
	public function checkSize($filename, $size){
		
		if ($size == 0){
			return false;
		}else if ($size > $this->_max){
			$this->_messages[] = "文件超出上传限制大小".$this->getMaxsize();
			return false;
		}else { 
			return true;
		}
	}
	
	/**
	 * 	检测上传文件的类型
	 *  @param mix $filename
	 *  @param mix $type
	 */
	protected  function checkType($filename, $type){
		if (!in_array($type, $this->_permited)){
			$this->_messages[] = "该文件类型是不被允许的上传类型";
			return false;
		}else {
			return true;
		}
	}
	
	/**
	 *  获取文件大小
	 *  
	 */
	public function getMaxsize(){
		return number_format($this->_max / 1024, 1).'KB';
	}
	
	/**
	 * 检测上传错误
	 * @param mix $filename
	 * @param int $error
	 * 
	 */
	public function checkError($filename, $error){
		switch ($error){
			case 0 : return true;
			case 1 :
			case 2 : $this->_messages[] = "文件过大！"; return true;
			case 3 : $this->_messages[] = "错误上传文件！";return false;
			case 4 : $this->_messages[] = "没有选择文件!"; return false;
			default : $this->_messages[] = "系统错误!"; return false;
		}
	}
}
?>