/*
    多文件上传类
    修改：Linvo 2008-2-15
*/
class more_file_upload{
    const FILE_PATH='../upfileclass/uploadfile/';
    var $file_type;
    var $file_type_array;
    var $file_type_real_array;
    var $file_type_string;
    var $file_name;
    var $file_size;
    var $file_tmp_name;
    var $file_error;
    var $handledate;
    static $totalsize=0;

    function __construct($file_name,$file_error,$file_size,$file_tmp_name,$file_type){          
        $this->handledate=date('m-d-Y');
        if (!empty($file_name)){
            $this->file_name = $file_name;
            $this->file_error = $file_error;
            $this->file_size = $file_size;
            $this->file_tmp_name = $file_tmp_name;
            $this->file_type = $file_type;
            $this->file_type_array = array('/', 'image/gif', 'image/jpg', 'image/jpeg', 'image/pjpeg', 'image/png');
            $this->file_type_real_array = array(0.1, 'jpg'=>74707370, 'gif'=>7173, 'bmp'=>6677, 'png'=>807871);
            
            $this->show_execute_message($this->file_error,$this->file_name,$this->file_type,$this->file_size);
        }
    }
    
    function __destruct(){
        $this->file_name = NULL;
        $this->file_error = NULL;
        $this->file_size = NULL;
        $this->file_tmp_name = NULL;
        $this->file_type = NULL;
        self::$totalsize = 0;
    }
    
    function show_execute_message($smfileerror,$smfilename,$smfiletype,$smfilesize){
        if($smfileerror>0){
            switch ($smfileerror){
                case 1: $smfilemessage='<strong>文件超过服务器的约定大小！</strong>';break;
                case 2: $smfilemessage='<strong>文件超过指定的文件大小！</strong>';break;
                case 3: $smfilemessage='<strong>文件只上传了部分！</strong>';break;
                case 4: echo "$this->file_name ".'文件上传失败！<br/>';break;
            }
            self::__destruct();                   
        }else{
            $smfiletypeflag = array_search($smfiletype,$this->file_type_array);

            //进行真实格式验证
            if($smfiletypeflag != false){
                $file = fopen($this->file_tmp_name, "rb");
                $bin = fread($file, 10);
                fclose($file);
                $strInfo  = @unpack("c10chars", $bin);
                $typeCode = intval($strInfo['chars1'].$strInfo['chars2']);
                $smfiletypeflag = array_search($typeCode, $this->file_type_real_array);
                if($smfiletypeflag == false){ //判断是否是png图片
                    $typeCode = intval($strInfo['chars2'].$strInfo['chars3'].$strInfo['chars4']);
                    $smfiletypeflag = array_search($typeCode, $this->file_type_real_array);
                    if($smfiletypeflag == false){ //判断是否是jpg图片
                        $typeCode = intval($strInfo['chars7'].$strInfo['chars8'].$strInfo['chars9'].$strInfo['chars10']);
                        $smfiletypeflag = array_search($typeCode, $this->file_type_real_array);
                    }
                }
            }

            if($smfiletypeflag == false){
                $smfilemessage='<strong>文件类型不对，请核实！</strong>';
                self::__destruct();        
            }else{
                $resflag = $this->move_file($this->file_tmp_name,$this->file_name);
                if ($resflag == 1){
                    $smfilemessage = '文件上传成功！';
                    self::$totalsize += intval($smfilesize);
                    self::__destruct();
                }else{
                    $smfilemessage = '<strong>文件上传失败！</strong>';
                    self::__destruct();
                }
            }
        }

        $smfilesizeformat = $this->size_BKM($smfilesize);
        echo '<tr>
            <td align="left" >'.$smfilename.'</td>
               <td align="center" >'.$smfiletype.'</td>
               <td align="center" >'.$smfilesizeformat.'</td>
               <td align="center" >'.$smfilemessage.'</td>    
            </tr>';                
    }
    
    function move_file($mvfiletmp,$mvfilename){ //移动文件
        $mvfilenamearr = explode('.',basename($mvfilename));
        $mvfilenamearr[0] = $this->rand_string();
        $mvfilename = implode('.',$mvfilenamearr);

        if (is_uploaded_file($mvfiletmp)){
            $uploadfile = self::FILE_PATH."$mvfilename";
            $result = move_uploaded_file($mvfiletmp,$uploadfile);
            return $result;
        }        
    }

    function rand_string(){
        $string = md5(uniqid(rand().microtime())); 
        return $string;
    }

    function size_BKM($size){ // B/KB/MB单位转换
        if($size < 1024) 
        {
            $size_BKM = (string)$size . " B";
        } 
        elseif($size < (1024 * 1024)) 
        {
            $size_BKM = number_format((double)($size / 1024), 1) . " KB";
        }else 
        { 
            $size_BKM = number_format((double)($size / (1024*1024)),1)." MB"; 
        } 
        return $size_BKM;
    }
}

教程网址:https://www.phprm.com/code/e97b1250394129ec0805dd62cbf18a20.html

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