php文件和图片上传类

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<?php
//文件和图片上传类
/*
 使用方法:
 function _upload($upload_dir){
 $upload = new UploadFile();
 //设置上传文件大小
 $upload->maxSize=1024*1024*2;//最大2M
 //设置上传文件类型
 $upload->allowExts  = explode(',','jpg,gif,png,bmp');

 //设置附件上传目录
 $upload->savePath ='../images/'.$upload_dir."/";
 $upload->saveRule = cp_uniqid;

 if(!$upload->upload())
 {
 //捕获上传异常
 $this->error($upload->getErrorMsg());
 }
 else
 {
 //取得成功上传的文件信息
 return $upload->getUploadFileInfo();
 }
 }
 */
class UploadFile{

	// 上传文件的最大值
	public $maxSize = -1;

	// 是否支持多文件上传
	public $supportMulti = true;

	// 允许上传的文件后缀
	//  留空不作后缀检查
	public $allowExts = array();

	// 允许上传的文件类型
	// 留空不做检查
	public $allowTypes = array();

	// 使用对上传图片进行缩略图处理
	public $thumb   =  false;
	// 缩略图最大宽度
	public $thumbMaxWidth;
	// 缩略图最大高度
	public $thumbMaxHeight;
	// 缩略图前缀
	public $thumbPrefix   =  'thumb_';
	public $thumbSuffix  =  '';
	// 缩略图保存路径
	public $thumbPath = '';
	// 缩略图文件名
	public $thumbFile		=	'';
	// 是否移除原图
	public $thumbRemoveOrigin = false;
	// 压缩图片文件上传
	public $zipImages = false;
	// 启用子目录保存文件
	public $autoSub   =  false;
	// 子目录创建方式 可以使用hash date
	public $subType   = 'hash';
	public $dateFormat = 'Ymd';
	public $hashLevel =  1; // hash的目录层次
	// 上传文件保存路径
	public $savePath = '';
	public $autoCheck = true; // 是否自动检查附件
	// 存在同名是否覆盖
	public $uploadReplace = false;

	// 上传文件命名规则
	// 例如可以是 time uniqid com_create_guid 等
	// 必须是一个无需任何参数的函数名 可以使用自定义函数
	public $saveRule = '';

	// 上传文件Hash规则函数名
	// 例如可以是 md5_file sha1_file 等
	public $hashType = 'md5_file';

	// 错误信息
	private $error = '';

	// 上传成功的文件信息
	private $uploadFileInfo ;

	/**
	 +----------------------------------------------------------
	 * 架构函数
	 +----------------------------------------------------------
	 * @access public
	 +----------------------------------------------------------
	 */
	public function __construct($maxSize='',$allowExts='',$allowTypes='',$savePath='',$saveRule='')
	{
		if(!empty($maxSize) && is_numeric($maxSize)) {
			$this->maxSize = $maxSize;
		}
		if(!empty($allowExts)) {
			if(is_array($allowExts)) {
				$this->allowExts = array_map('strtolower',$allowExts);
			}else {
				$this->allowExts = explode(',',strtolower($allowExts));
			}
		}
		if(!empty($allowTypes)) {
			if(is_array($allowTypes)) {
				$this->allowTypes = array_map('strtolower',$allowTypes);
			}else {
				$this->allowTypes = explode(',',strtolower($allowTypes));
			}
		}
		if(!empty($savePath)) {
			$this->savePath = $savePath;
		}
		if(!empty($saveRule)) {
			$this->saveRule = $saveRule;
		}


	}

	private function save($file)
	{
		$filename = $file['savepath'].$file['savename'];
		if(!$this->uploadReplace && is_file($filename)) {
			// 不覆盖同名文件
			$this->error	=	'文件已经存在!'.$filename;
			return false;
		}
		// 如果是图像文件 检测文件格式
		if( in_array(strtolower($file['extension']),array('gif','jpg','jpeg','bmp','png','swf')) && false === getimagesize($file['tmp_name'])) {
			$this->error = '非法图像文件';
			return false;
		}
		if(!move_uploaded_file($file['tmp_name'], iconv('utf-8','gbk',$filename))) {
			$this->error = '文件上传保存错误!';
			return false;
		}
		if($this->thumb && in_array(strtolower($file['extension']),array('gif','jpg','jpeg','bmp','png'))) {
			$image =  getimagesize($filename);
			if(false !== $image) {
				//是图像文件生成缩略图
				$thumbWidth		=	explode(',',$this->thumbMaxWidth);
				$thumbHeight		=	explode(',',$this->thumbMaxHeight);
				$thumbPrefix		=	explode(',',$this->thumbPrefix);
				$thumbSuffix = explode(',',$this->thumbSuffix);
				$thumbFile			=	explode(',',$this->thumbFile);
				$thumbPath    =  $this->thumbPath?$this->thumbPath:$file['savepath'];
				// 生成图像缩略图
				if(file_exists(dirname(__FILE__).'/Image.class.php'))
				{
					require_once(dirname(__FILE__).'/Image.class.php');
					$realFilename  =  $this->autoSub?basename($file['savename']):$file['savename'];
					for($i=0,$len=count($thumbWidth); $i<$len; $i++) {
						$thumbname	=	$thumbPath.$thumbPrefix[$i].substr($realFilename,0,strrpos($realFilename, '.')).$thumbSuffix[$i].'.'.$file['extension'];
						Image::thumb($filename,$thumbname,'',$thumbWidth[$i],$thumbHeight[$i],true);
					}
					if($this->thumbRemoveOrigin) {
						// 生成缩略图之后删除原图
						unlink($filename);
					}
				}
			}
		}
		if($this->zipImags) {
			// TODO 对图片压缩包在线解压

		}
		return true;
	}

	/**
	 +----------------------------------------------------------
	 * 上传文件
	 +----------------------------------------------------------
	 * @access public
	 +----------------------------------------------------------
	 * @param string $savePath  上传文件保存路径
	 +----------------------------------------------------------
	 * @return string
	 +----------------------------------------------------------
	 * @throws ThinkExecption
	 +----------------------------------------------------------
	 */
	public function upload($savePath ='')
	{
		//如果不指定保存文件名,则由系统默认
		if(empty($savePath))
		$savePath = $this->savePath;
		// 检查上传目录
		if(!is_dir($savePath)) {
			// 检查目录是否编码后的
			if(is_dir(base64_decode($savePath))) {
				$savePath	=	base64_decode($savePath);
			}else{
				// 尝试创建目录
				if(!mkdir($savePath)){
					$this->error  =  '上传目录'.$savePath.'不存在';
					return false;
				}
			}
		}else {
			if(!is_writeable($savePath)) {
				$this->error  =  '上传目录'.$savePath.'不可写';
				return false;
			}
		}
		$fileInfo = array();
		$isUpload   = false;

		// 获取上传的文件信息
		// 对$_FILES数组信息处理
		$files	 =	 $this->dealFiles($_FILES);
		foreach($files as $key => $file) {
			//过滤无效的上传
			if(!empty($file['name'])) {
				//登记上传文件的扩展信息
				$file['key']          =  $key;
				$file['extension']  = $this->getExt($file['name']);
				$file['savepath']   = $savePath;
				$file['savename']   = $this->getSaveName($file);

				// 自动检查附件
				if($this->autoCheck) {
					if(!$this->check($file))
					return false;
				}

				//保存上传文件
				if(!$this->save($file)) return false;
				/*
				 if(function_exists($this->hashType)) {
				 $fun =  $this->hashType;
				 $file['hash']   =  $fun(auto_charset($file['savepath'].$file['savename'],'utf-8','gbk'));
				 }
				 */
				//上传成功后保存文件信息,供其他地方调用
				unset($file['tmp_name'],$file['error']);
				$fileInfo[] = $file;
				$isUpload   = true;
			}
		}
		if($isUpload) {
			$this->uploadFileInfo = $fileInfo;
			return true;
		}else {
			$this->error  =  '没有选择上传文件';
			return false;
		}
	}

	/**
	 +----------------------------------------------------------
	 * 转换上传文件数组变量为正确的方式
	 +----------------------------------------------------------
	 * @access private
	 +----------------------------------------------------------
	 * @param array $files  上传的文件变量
	 +----------------------------------------------------------
	 * @return array
	 +----------------------------------------------------------
	 */
	private function dealFiles($files) {
		$fileArray = array();
		foreach ($files as $file){
			if(is_array($file['name'])) {
				$keys = array_keys($file);
				$count	 =	 count($file['name']);
				for ($i=0; $i<$count; $i++) {
					foreach ($keys as $key)
					$fileArray[$i][$key] = $file[$key][$i];
				}
			}else{
				$fileArray	=	$files;
			}
			break;
		}
		return $fileArray;
	}

	/**
	 +----------------------------------------------------------
	 * 获取错误代码信息
	 +----------------------------------------------------------
	 * @access public
	 +----------------------------------------------------------
	 * @param string $errorNo  错误号码
	 +----------------------------------------------------------
	 * @return void
	 +----------------------------------------------------------
	 * @throws ThinkExecption
	 +----------------------------------------------------------
	 */
	protected function error($errorNo)
	{
		switch($errorNo) {
			case 1:
				$this->error = '上传的文件超过了 php.ini 中 upload_max_filesize 选项限制的值';
				break;
			case 2:
				$this->error = '上传文件的大小超过了 HTML 表单中 MAX_FILE_SIZE 选项指定的值';
				break;
			case 3:
				$this->error = '文件只有部分被上传';
				break;
			case 4:
				$this->error = '没有文件被上传';
				break;
			case 6:
				$this->error = '找不到临时文件夹';
				break;
			case 7:
				$this->error = '文件写入失败';
				break;
			default:
				$this->error = '未知上传错误!';
		}
		return ;
	}

	/**
	 +----------------------------------------------------------
	 * 根据上传文件命名规则取得保存文件名
	 +----------------------------------------------------------
	 * @access private
	 +----------------------------------------------------------
	 * @param string $filename 数据
	 +----------------------------------------------------------
	 * @return string
	 +----------------------------------------------------------
	 */
	private function getSaveName($filename)
	{
		$rule = $this->saveRule;
		if(empty($rule)) {//没有定义命名规则,则保持文件名不变
			$saveName = $filename['name'];
		}else {
			if(function_exists($rule)) {
				//使用函数生成一个唯一文件标识号
				$saveName = $rule().".".$filename['extension'];
			}else {
				//使用给定的文件名作为标识号
				$saveName = $rule.".".$filename['extension'];
			}
		}
		if($this->autoSub) {
			// 使用子目录保存文件
			$saveName   =  $this->getSubName($filename).'/'.$saveName;
		}
		return $saveName;
	}

	/**
	 +----------------------------------------------------------
	 * 获取子目录的名称
	 +----------------------------------------------------------
	 * @access private
	 +----------------------------------------------------------
	 * @param array $file  上传的文件信息
	 +----------------------------------------------------------
	 * @return string
	 +----------------------------------------------------------
	 */
	private function getSubName($file)
	{
		switch($this->subType) {
			case 'date':
				$dir   =  date($this->dateFormat,time());
				break;
			case 'hash':
			default:
				$name = md5($file['savename']);
				$dir   =  '';
				for($i=0;$i<$this->hashLevel;$i++) {
					$dir   .=  $name{0}.'/';
				}
				break;
		}
		if(!is_dir($file['savepath'].$dir)) {
			mkdir($file['savepath'].$dir);
		}
		return $dir;
	}

	/**
	 +----------------------------------------------------------
	 * 检查上传的文件
	 +----------------------------------------------------------
	 * @access private
	 +----------------------------------------------------------
	 * @param array $file 文件信息
	 +----------------------------------------------------------
	 * @return boolean
	 +----------------------------------------------------------
	 */
	private function check($file) {
		if($file['error']!== 0) {
			//文件上传失败
			//捕获错误代码
			$this->error($file['error']);
			return false;
		}

		//检查文件Mime类型
		if(!$this->checkType($file['type'])) {
			$this->error = '上传文件MIME类型不允许!';
			return false;
		}
		//检查文件类型
		if(!$this->checkExt($file['extension'])) {
			$this->error ='上传文件类型不允许';
			return false;
		}
		//文件上传成功,进行自定义规则检查
		//检查文件大小
		if(!$this->checkSize($file['size'])) {
			$this->error = '上传文件大小超出限制!';
			return false;
		}

		//检查是否合法上传
		if(!$this->checkUpload($file['tmp_name'])) {
			$this->error = '非法上传文件!';
			return false;
		}
		return true;
	}

	/**
	 +----------------------------------------------------------
	 * 检查上传的文件类型是否合法
	 +----------------------------------------------------------
	 * @access private
	 +----------------------------------------------------------
	 * @param string $type 数据
	 +----------------------------------------------------------
	 * @return boolean
	 +----------------------------------------------------------
	 */
	private function checkType($type)
	{
		if(!empty($this->allowTypes))
		return in_array(strtolower($type),$this->allowTypes);
		return true;
	}


	/**
	 +----------------------------------------------------------
	 * 检查上传的文件后缀是否合法
	 +----------------------------------------------------------
	 * @access private
	 +----------------------------------------------------------
	 * @param string $ext 后缀名
	 +----------------------------------------------------------
	 * @return boolean
	 +----------------------------------------------------------
	 */
	private function checkExt($ext)
	{
		if(!empty($this->allowExts))
		return in_array(strtolower($ext),$this->allowExts,true);
		return true;
	}

	/**
	 +----------------------------------------------------------
	 * 检查文件大小是否合法
	 +----------------------------------------------------------
	 * @access private
	 +----------------------------------------------------------
	 * @param integer $size 数据
	 +----------------------------------------------------------
	 * @return boolean
	 +----------------------------------------------------------
	 */
	private function checkSize($size)
	{
		return !($size > $this->maxSize) || (-1 == $this->maxSize);
	}

	/**
	 +----------------------------------------------------------
	 * 检查文件是否非法提交
	 +----------------------------------------------------------
	 * @access private
	 +----------------------------------------------------------
	 * @param string $filename 文件名
	 +----------------------------------------------------------
	 * @return boolean
	 +----------------------------------------------------------
	 */
	private function checkUpload($filename)
	{
		return is_uploaded_file($filename);
	}

	/**
	 +----------------------------------------------------------
	 * 取得上传文件的后缀
	 +----------------------------------------------------------
	 * @access private
	 +----------------------------------------------------------
	 * @param string $filename 文件名
	 +----------------------------------------------------------
	 * @return boolean
	 +----------------------------------------------------------
	 */
	private function getExt($filename)
	{
		$pathinfo = pathinfo($filename);
		return $pathinfo['extension'];
	}

	/**
	 +----------------------------------------------------------
	 * 取得上传文件的信息
	 +----------------------------------------------------------
	 * @access public
	 +----------------------------------------------------------
	 * @return array
	 +----------------------------------------------------------
	 */
	public function getUploadFileInfo()
	{
		return $this->uploadFileInfo;
	}

	/**
	 +----------------------------------------------------------
	 * 取得最后一次错误信息
	 +----------------------------------------------------------
	 * @access public
	 +----------------------------------------------------------
	 * @return string
	 +----------------------------------------------------------
	 */
	public function getErrorMsg()
	{
		return $this->error;
	}

}//类定义结束
?>