php文件和圖片上傳類

<?php
//文件和圖片上傳類
/
 使用方法：
 function _upload($upload_dir){
 $upload = new UploadFile();
 //設置上傳文件大小
 $upload->maxSize=10241024*2;//最大2M
 //設置上傳文件類型
 $upload->allowExts  = explode(',','jpg,gif,png,bmp');

//設置附件上傳目錄
 $upload->savePath ='../images/'.$upload_dir."/";
 $upload->saveRule = cp_uniqid;
if(!$upload->upload())
 {
 //捕獲上傳異常
 $this->error($upload->getErrorMsg());
 }
 else
 {
 //取得成功上傳的文件信息
 return $upload->getUploadFileInfo();
 }
 }
 */
class UploadFile{

// 上傳文件的最大值
public $maxSize = -1;

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

// 允許上傳的文件后綴
//  留空不作后綴檢查
public $allowExts = array();

// 允許上傳的文件類型
// 留空不做檢查
public $allowTypes = array();

// 使用對上傳圖片進行縮略圖處理
public $thumb   =  false;
// 縮略圖最大寬度
public $thumbMaxWidth;
// 縮略圖最大高度
public $thumbMaxHeight;
// 縮略圖前綴
public $thumbPrefix   =  'thumb_';
public $thumbSuffix  =  '';
// 縮略圖保存路徑
public $thumbPath = '';
// 縮略圖文件名
public $thumbFile       =   '';
// 是否移除原圖
public $thumbRemoveOrigin = false;
// 壓縮圖片文件上傳
public $zipImages = false;
// 啟用子目錄保存文件
public $autoSub   =  false;
// 子目錄創建方式 可以使用hash date
public $subType   = 'hash';
public $dateFormat = 'Ymd';
public $hashLevel =  1; // hash的目錄層次
// 上傳文件保存路徑
public $savePath = '';
public $autoCheck = true; // 是否自動檢查附件
// 存在同名是否覆蓋
public $uploadReplace = false;

// 上傳文件命名規則
// 例如可以是 time uniqid com_create_guid 等
// 必須是一個無需任何參數的函數名 可以使用自定義函數
public $saveRule = '';

// 上傳文件Hash規則函數名
// 例如可以是 md5_file sha1_file 等
public $hashType = 'md5_file';

// 錯誤信息
private $error = '';

// 上傳成功的文件信息
private $uploadFileInfo ;

/**
 +----------------------------------------------------------
 * 架構函數
 +----------------------------------------------------------
 * @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)) {
        // 不覆蓋同名文件
        $this->error =   '文件已經存在！'.$filename;
        return false;
    }
    // 如果是圖像文件 檢測文件格式
    if( in_array(strtolower($file['extension']),array('gif','jpg','jpeg','bmp','png','swf')) && false === getimagesize($file['tmp_name'])) {
        $this->error = '非法圖像文件';
        return false;
    }
    if(!move_uploaded_file($file['tmp_name'], iconv('utf-8','gbk',$filename))) {
        $this->error = '文件上傳保存錯誤！';
        return false;
    }
    if($this->thumb && in_array(strtolower($file['extension']),array('gif','jpg','jpeg','bmp','png'))) {
        $image =  getimagesize($filename);
        if(false !== $image) {
            //是圖像文件生成縮略圖
            $thumbWidth     =   explode(',',$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'];
            // 生成圖像縮略圖
            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($this->thumbRemoveOrigin) {
                    // 生成縮略圖之后刪除原圖
                    unlink($filename);
                }
            }
        }
    }
    if($this->zipImags) {
        // TODO 對圖片壓縮包在線解壓

    }
    return true;
}

/**
 +----------------------------------------------------------
 * 上傳文件
 +----------------------------------------------------------
 * @access public
 +----------------------------------------------------------
 * @param string $savePath  上傳文件保存路徑
 +----------------------------------------------------------
 * @return string
 +----------------------------------------------------------
 * @throws ThinkExecption
 +----------------------------------------------------------
 */
public function upload($savePath ='')
{
    //如果不指定保存文件名，則由系統默認
    if(empty($savePath))
    $savePath = $this->savePath;
    // 檢查上傳目錄
    if(!is_dir($savePath)) {
        // 檢查目錄是否編碼后的
        if(is_dir(base64_decode($savePath))) {
            $savePath   =   base64_decode($savePath);
        }else{
            // 嘗試創建目錄
            if(!mkdir($savePath)){
                $this->error  =  '上傳目錄'.$savePath.'不存在';
                return false;
            }
        }
    }else {
        if(!is_writeable($savePath)) {
            $this->error  =  '上傳目錄'.$savePath.'不可寫';
            return false;
        }
    }
    $fileInfo = array();
    $isUpload   = false;

    // 獲取上傳的文件信息
    // 對$_FILES數組信息處理
    $files   =   $this->dealFiles($_FILES);
    foreach($files as $key => $file) {
        //過濾無效的上傳
        if(!empty($file['name'])) {
            //登記上傳文件的擴展信息
            $file['key']          =  $key;
            $file['extension']  = $this->getExt($file['name']);
            $file['savepath']   = $savePath;
            $file['savename']   = $this->getSaveName($file);

            // 自動檢查附件
            if($this->autoCheck) {
                if(!$this->check($file))
                return false;
            }

            //保存上傳文件
            if(!$this->save($file)) return false;
            /*
             if(function_exists($this->hashType)) {
             $fun =  $this->hashType;
             $file['hash']   =  $fun(auto_charset($file['savepath'].$file['savename'],'utf-8','gbk'));
             }
             */
            //上傳成功后保存文件信息，供其他地方調用
            unset($file['tmp_name'],$file['error']);
            $fileInfo[] = $file;
            $isUpload   = true;
        }
    }
    if($isUpload) {
        $this->uploadFileInfo = $fileInfo;
        return true;
    }else {
        $this->error  =  '沒有選擇上傳文件';
        return false;
    }
}

/**
 +----------------------------------------------------------
 * 轉換上傳文件數組變量為正確的方式
 +----------------------------------------------------------
 * @access private
 +----------------------------------------------------------
 * @param array $files  上傳的文件變量
 +----------------------------------------------------------
 * @return array
 +----------------------------------------------------------
 */
private function dealFiles($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;
}

/**
 +----------------------------------------------------------
 * 獲取錯誤代碼信息
 +----------------------------------------------------------
 * @access public
 +----------------------------------------------------------
 * @param string $errorNo  錯誤號碼
 +----------------------------------------------------------
 * @return void
 +----------------------------------------------------------
 * @throws ThinkExecption
 +----------------------------------------------------------
 */
protected function error($errorNo)
{
    switch($errorNo) {
        case 1:
            $this->error = '上傳的文件超過了 php.ini 中 upload_max_filesize 選項限制的值';
            break;
        case 2:
            $this->error = '上傳文件的大小超過了 HTML 表單中 MAX_FILE_SIZE 選項指定的值';
            break;
        case 3:
            $this->error = '文件只有部分被上傳';
            break;
        case 4:
            $this->error = '沒有文件被上傳';
            break;
        case 6:
            $this->error = '找不到臨時文件夾';
            break;
        case 7:
            $this->error = '文件寫入失敗';
            break;
        default:
            $this->error = '未知上傳錯誤！';
    }
    return ;
}

/**
 +----------------------------------------------------------
 * 根據上傳文件命名規則取得保存文件名
 +----------------------------------------------------------
 * @access private
 +----------------------------------------------------------
 * @param string $filename 數據
 +----------------------------------------------------------
 * @return string
 +----------------------------------------------------------
 */
private function getSaveName($filename)
{
    $rule = $this->saveRule;
    if(empty($rule)) {//沒有定義命名規則，則保持文件名不變
        $saveName = $filename['name'];
    }else {
        if(function_exists($rule)) {
            //使用函數生成一個唯一文件標識號
            $saveName = $rule().".".$filename['extension'];
        }else {
            //使用給定的文件名作為標識號
            $saveName = $rule.".".$filename['extension'];
        }
    }
    if($this->autoSub) {
        // 使用子目錄保存文件
        $saveName   =  $this->getSubName($filename).'/'.$saveName;
    }
    return $saveName;
}

/**
 +----------------------------------------------------------
 * 獲取子目錄的名稱
 +----------------------------------------------------------
 * @access private
 +----------------------------------------------------------
 * @param array $file  上傳的文件信息
 +----------------------------------------------------------
 * @return string
 +----------------------------------------------------------
 */
private function getSubName($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;
}

/**
 +----------------------------------------------------------
 * 檢查上傳的文件
 +----------------------------------------------------------
 * @access private
 +----------------------------------------------------------
 * @param array $file 文件信息
 +----------------------------------------------------------
 * @return boolean
 +----------------------------------------------------------
 */
private function check($file) {
    if($file['error']!== 0) {
        //文件上傳失敗
        //捕獲錯誤代碼
        $this->error($file['error']);
        return false;
    }

    //檢查文件Mime類型
    if(!$this->checkType($file['type'])) {
        $this->error = '上傳文件MIME類型不允許！';
        return false;
    }
    //檢查文件類型
    if(!$this->checkExt($file['extension'])) {
        $this->error ='上傳文件類型不允許';
        return false;
    }
    //文件上傳成功，進行自定義規則檢查
    //檢查文件大小
    if(!$this->checkSize($file['size'])) {
        $this->error = '上傳文件大小超出限制！';
        return false;
    }

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

/**
 +----------------------------------------------------------
 * 檢查上傳的文件類型是否合法
 +----------------------------------------------------------
 * @access private
 +----------------------------------------------------------
 * @param string $type 數據
 +----------------------------------------------------------
 * @return boolean
 +----------------------------------------------------------
 */
private function checkType($type)
{
    if(!empty($this->allowTypes))
    return in_array(strtolower($type),$this->allowTypes);
    return true;
}


/**
 +----------------------------------------------------------
 * 檢查上傳的文件后綴是否合法
 +----------------------------------------------------------
 * @access private
 +----------------------------------------------------------
 * @param string $ext 后綴名
 +----------------------------------------------------------
 * @return boolean
 +----------------------------------------------------------
 */
private function checkExt($ext)
{
    if(!empty($this->allowExts))
    return in_array(strtolower($ext),$this->allowExts,true);
    return true;
}

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

/**
 +----------------------------------------------------------
 * 檢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);
}

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

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

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


}//類定義結束
?></pre>