php上传类

<?php
/**
 +----------------------------------------------------------------------------- 
 * 文件上传类
 +-----------------------------------------------------------------------------
 * @author Administrator
 +-----------------------------------------------------------------------------
 */
  class FileUpload{
  	
  	private $filepath;   //保存路径
  	private $allowtype=array('gif','jpg','jpeg','png','txt');
  	private $maxsize=1000000;   //最大允许上传大小
  	private $israndname=true;  //是否随机
  	private $orginame;  //原始文件名
  	private $tmpname;   //临时文件名
  	private $newname;   //新文件名
  	private $filetype;  //文件类型 
  	private $filesize;  //文件大小
  	private $errornum=''; //错误号
  	private $errormsg;  //错误信息
/**
 +------------------------------------------------------------------------------ 
 *构造函数
 +------------------------------------------------------------------------------ 
 * @param string $savepath   保存路径
 * @param string $allowtype  允许类型
 * @param string $maxsize    允许大小
 * 
 +------------------------------------------------------------------------------
 */  	
  	function  __construct($option=array()){
  		 foreach ($option as $key=>$value){
  		 	 
  		 	if (!in_array($key,get_class_vars(get_class($this)))){
  		 	 	continue;
  		 	 }
  		 	$this->setOption($key, $value); 
  		 }
  	}
  	function uploadfile($field) {
  		  $return=true;
  		if (!$this->CheckPath()) {
  			$this->errormsg=$this->geterrorNum();
  			return false;
  		}
  		$name=$_FILES[$field]['name'];
  		$tmpname=$_FILES[$field]['tmp_name'];
  		$filesize=$_FILES[$field]['size'];
  		$error=$_FILES[$field]['error']; 
  		 if (is_array($name)) {
  		 	$errors=array();
  		 	 for ($i=0;$i<count($name);$i++){
  		 	 	if ($this->getFile($name[$i],$tmpname[$i],$filesize[$i],$errors[$i])) {
  		 	 		if (!$this->CheckSize() && !$this->CheckType()) {
  		 	 			$errors=$this->getErrorNum();
  		 	 			return false;
  		 	 		   }  		 	 				 	 			  		 	 		
  		 	 	}else{
  		 	 		   $errors=$this->getErrorNum();
  		 	 		   return false;
  		 	 	}
  		 	 	if (!$return) {
  		 	 		$this->getFile();
  		 	 	}
  		 	 }
  		 	 if ($return) {
  		 	 	$fileNames=array();
  		 	 	for ($i=0;$i<count($name);$i++){
  		 	 		if ($this->getFile($name[$i], $tmpname[$i], $filesize[$i], $filesize[$i])) {
  		 	 			$this->SetFileName();
  		 	 			if (!$this->MoveFile()) {
  		 	 				$errors[]=$this->getErrorNum();
  		 	 				$return=false;
  		 	 			}else{
  		 	 				$fileNames[]=$this->getNewName();
  		 	 			}
  		 	 		}  		 	 	
  		 	 	}
  		 	 	$this->newname=$fileNames;
  		 	 }
  		 	   $this->errormsg=$errors;
  		 	   return $return;
  		 	  
  		 }else{ 
  		   if($this->getFile($name,$tmpname,filesize,$error)){
  		   	    if(!$this->CheckSize()){
  		   	    	return false;
  		   	    }
  		   	    if(!$this->CheckType()){
  		   	    	return false;
  		   	    }
  		   	     $this->SetFileName();
  		   	    if ($this->MoveFile()) {
  		   	    		return true;
  		   	    }  
  		   }else{
  		   	return false;
  		   }
  		   	 
  		   if (!$return) {
  		   	$this->setOption('ErrorNum', 0);
  		   	$this->errormsg=$this->geterrorNum();
  		   }
  		  return $return; 
  	  }
  	}
  	/**
  	 +------------------------------------------------------------------------
  	 *设置类属性值函数
  	 +------------------------------------------------------------------------
  	 * @param mix $key
  	 * @param mix $value
  	 */
  	private function setOption($key,$value){
  		$key=strtolower($key);
  		$this->$key=$value;
  	}
  	/**
  	 +--------------------------------------------------------------------------- 
  	 * 获取文件变量参数函数
  	 +---------------------------------------------------------------------------
  	 * @param string $name
  	 * @param string $tmp_name
  	 * @param number $size
  	 * @param number $error
  	 */
  	private function getFile($name,$tmpname,$filetype,$filesize,$error=0){	
  		
  		$this->setOption('TmpName', $tmpname);
  		$this->setOption('OrgiName', $name);
  		$arrstr=explode('.', $name);
  		$this->setOption('FileType', $arrstr[count($arrstr)-1]);  		
  		$this->setOption('FileSize', $filesize);
  		return true;
  	}
  	/**
  	 +-------------------------------------------------------------------------
  	 * 检查上传路径函数
  	 +-------------------------------------------------------------------------
  	 * @return boolean
  	 */
  	private function CheckPath(){
  		if(empty($this->filepath)){
  			$this->setOption('ErrorNum', -5);
  			return false;
  		}
  		if (!file_exists($this->filepath)||!is_writable($this->filepath)) {
  			  if (!@mkdir($this->filepath,0755)) {
  			  	  $this->setOption('ErrorNum',-4);
  			  	  return false;
  			  }
  		}
  		return true;
  	}
  	private function Is_Http_Post(){
  		if (!is_uploaded_file($this->tmpname)) {
  		   $this->setOption('ErrorNum',-6);	
  		   return false;
  		}else{
  			return true;
  		}
  	}
  	/**
  	 +-------------------------------------------------------------------- 
  	 *检查文件尺寸函数
  	 +--------------------------------------------------------------------
  	 * @return boolean
  	 */
  	private function CheckSize(){
  		if ($this->filesize>$this->maxsize) {
  			$this->setOption('ErrorNum', -2);
  			return false;
  		}else{
  			return true;
  		}
  	}
  	/**
  	 +--------------------------------------------------------------- 
  	 * 检查文件类型函数
  	 +--------------------------------------------------------------- 
  	 * @return boolean
  	 */
  	private function CheckType(){
  		if (in_array($this->filetype, $this->allowtype)) {
  			return true;
  		}else{
  			$this->setOption('ErrorNum', -1);
  			return false;
  		}
  	}
  	private function SetFileName(){
  		if ($this->israndname) {
  			$this->setOption('NewName', $this->RandName());
  		}else{
  			$this->setOption('NewName',$this->orginame);
  		} 
  	}
  	/**
  	 +----------------------------------------------------------------- 
  	 * 获取新文件名
  	 +------------------------------------------------------------------ 
  	 */
  	public function getNewName() {
  		return $this->newname;
  	}
  	private function RandName(){
  		$rule=date("YmdHis").rand(0, 999);
  		return $rule.'.'.$this->filetype;
  	}
  	private function MoveFile(){
  		if ($this->errornum) {
  			$filepath=rtrim($this->filaepath,'/').'/';
  			$filepath.=$this->newname;
  			if (@move_uploaded_file($this->tmpname,$filepath)) {
  				return true;
  			 }else{
  			 	$this->errormsg=$this->setOption('ErrorNum',-3 );
  			 }
  		}else{
  			return false;
  		}
  	}
  	/**
  	 +---------------------------------------------------------------- 
  	 * 错误信息函数
  	 +----------------------------------------------------------------
  	 * @return string
  	 */
  	 function getErrorNum() {
  		$erstr="上传文件<font color='red'>{$this->orginame}</font>出错";
  		switch ($this->errornum) {
  			case 4:
  			 $erstr.="没有文件被上传";
  			    break;
  			case 3:
  			 $erstr.="文件只被部分上传";
  				break;
  			case 2:
  			 $erstr.="上传文件超过了HTML表单MAX_FILE_SIZE指定的值";
  				break;
  			case 1:
  			 $erstr.="上传文件超过了php.ini配置文件中upload_max_filesize的值";
  				break;
  			case 0:
  			 $erstr="上传{$this->orginame}成功";
  			    break;				
  			case -1:
  			 $erstr="未允许的类型";
  			    break;
  			case -2:
  			 $erstr.="文件过大，不能超过{$this->maxsize}个字节"; 
  			    break;
  			case -3:
  			 $erstr.="上传失败";
  			    break;
  			case -4:
  			 $erstr="创建上传目录失败，请重新指定上传目录";
  			    break;
  			case -5:
  			 $erstr="未指定上传路径";
  			    break;
  			case -6:
  			 $erstr="非法操作";
  			    break;	    	    	    	       		
  			default:
  			 $erstr.="未知错误";
  			    
  		}
  		return  $erstr;
  	}
  }
?>