PHP文件下载类

　　复制代码 代码如下:<?
//====================================================
//使用范例：
//$download=newdownload(php,exe,html,false);
//if(!$download->downloadfile($filename))
//{
//echo$download->geterrormsg();
//}
//====================================================
classdownload{
var$debug=true;
var$errormsg=;
var$Filter=array();
var$filename=;
var$mineType=text/plain;
var$xlq_filetype=array();

functiondownload($fileFilter=,$isdebug=true)
{
$this->setFilter($fileFilter);
$this->setdebug($isdebug);
$this->setfiletype();
}

functionsetFilter($fileFilter)
{
if(empty($fileFilter))return;
$this->Filter=explode(,,strtolower($fileFilter));
}
functionsetdebug($debug)
{
$this->debug=$debug;
}

functionsetfilename($filename)
{
$this->filename=$filename;
}

functiondownloadfile($filename)
{
$this->setfilename($filename);
if($this->filecheck())
{
$fn=array_pop(explode(/,strtr($this->filename,\\,/)));
header(Pragma:public);
header(Expires:0);//setexpirationtime
header(Cache-Component:must-revalidate,post-check=0,pre-check=0);
header(Content-type:.$this->mineType);
header(Content-Length:.filesize($this->filename));
header(Content-Disposition:attachment;filename=\$fn\);
header(Content-Transfer-Encoding:binary);
readfile($this->filename);
returntrue;
}else
{
returnfalse;
}
}
functiongeterrormsg()
{
return$this->errormsg;
}

functionfilecheck()
{
$filename=$this->filename;
if(file_exists($filename))
{
$filetype=strtolower(array_pop(explode(.,$filename)));
if(in_array($filetype,$this->Filter))
{
$this->errormsg.=$filename.不允许下载！;
if($this->debug)exit($filename.不允许下载！);
returnfalse;
}else
{
if(function_exists(mime_content_type))
{
$this->mineType=mime_content_type($filename);
}
if(empty($this->mineType))
{
if(isset($this->xlq_filetype[$filetype]))$this->mineType=$this->xlq_filetype[$filetype];
}
if(!empty($this->mineType))
returntrue;
else
{
$this->errormsg.=获取.$filename.文件类型时候发生错误，或者不存在预定文件类型内;
if($this->debug)exit(获取文件类型出错);
returnfalse;
}
}
}else
{
$this->errormsg.=$filename.不存在!;
if($this->debug)exit($filename.不存在!);
returnfalse;
}
}

functionsetfiletype()
{
$this->xlq_filetype[chm]=application/octet-stream;
$this->xlq_filetype[ppt]=application/vnd.ms-powerpoint;
$this->xlq_filetype[xls]=application/vnd.ms-excel;
$this->xlq_filetype[doc]=application/msword;
$this->xlq_filetype[exe]=application/octet-stream;
$this->xlq_filetype[rar]=application/octet-stream;
$this->xlq_filetype[js]=javascript/js;
$this->xlq_filetype[css]=text/css;
$this->xlq_filetype[hqx]=application/mac-binhex40;
$this->xlq_filetype[bin]=application/octet-stream;
$this->xlq_filetype[oda]=application/oda;
$this->xlq_filetype[pdf]=application/pdf;
$this->xlq_filetype[ai]=application/postsrcipt;
$this->xlq_filetype[eps]=application/postsrcipt;
$this->xlq_filetype[es]=application/postsrcipt;
$this->xlq_filetype[rtf]=application/rtf;
$this->xlq_filetype[mif]=application/x-mif;
$this->xlq_filetype[csh]=application/x-csh;
$this->xlq_filetype[dvi]=application/x-dvi;
$this->xlq_filetype[hdf]=application/x-hdf;
$this->xlq_filetype[nc]=application/x-netcdf;
$this->xlq_filetype[cdf]=application/x-netcdf;
$this->xlq_filetype[latex]=application/x-latex;
$this->xlq_filetype[ts]=application/x-troll-ts;
$this->xlq_filetype[src]=application/x-wais-source;
$this->xlq_filetype[zip]=application/zip;
$this->xlq_filetype[bcpio]=application/x-bcpio;
$this->xlq_filetype[cpio]=application/x-cpio;
$this->xlq_filetype[gtar]=application/x-gtar;
$this->xlq_filetype[shar]=application/x-shar;
$this->xlq_filetype[sv4cpio]=application/x-sv4cpio;
$this->xlq_filetype[sv4crc]=application/x-sv4crc;
$this->xlq_filetype[tar]=application/x-tar;
$this->xlq_filetype[ustar]=application/x-ustar;
$this->xlq_filetype[man]=application/x-troff-man;
$this->xlq_filetype[sh]=application/x-sh;
$this->xlq_filetype[tcl]=application/x-tcl;
$this->xlq_filetype[tex]=application/x-tex;
$this->xlq_filetype[texi]=application/x-texinfo;
$this->xlq_filetype[texinfo]=application/x-texinfo;
$this->xlq_filetype[t]=application/x-troff;
$this->xlq_filetype[tr]=application/x-troff;
$this->xlq_filetype[roff]=application/x-troff;
$this->xlq_filetype[shar]=application/x-shar;
$this->xlq_filetype[me]=application/x-troll-me;
$this->xlq_filetype[ts]=application/x-troll-ts;
$this->xlq_filetype[gif]=image/gif;
$this->xlq_filetype[jpeg]=image/pjpeg;
$this->xlq_filetype[jpg]=image/pjpeg;
$this->xlq_filetype[jpe]=image/pjpeg;
$this->xlq_filetype[ras]=image/x-cmu-raster;
$this->xlq_filetype[pbm]=image/x-portable-bitmap;
$this->xlq_filetype[ppm]=image/x-portable-pixmap;
$this->xlq_filetype[xbm]=image/x-xbitmap;
$this->xlq_filetype[xwd]=image/x-xwindowdump;
$this->xlq_filetype[ief]=image/ief;
$this->xlq_filetype[tif]=image/tiff;
$this->xlq_filetype[tiff]=image/tiff;
$this->xlq_filetype[pnm]=image/x-portable-anymap;
$this->xlq_filetype[pgm]=image/x-portable-graymap;
$this->xlq_filetype[rgb]=image/x-rgb;
$this->xlq_filetype[xpm]=image/x-xpixmap;
$this->xlq_filetype[txt]=text/plain;
$this->xlq_filetype[c]=text/plain;
$this->xlq_filetype[cc]=text/plain;
$this->xlq_filetype[h]=text/plain;
$this->xlq_filetype[html]=text/html;
$this->xlq_filetype[htm]=text/html;
$this->xlq_filetype[htl]=text/html;
$this->xlq_filetype[rtx]=text/richtext;
$this->xlq_filetype[etx]=text/x-setext;
$this->xlq_filetype[tsv]=text/tab-separated-values;
$this->xlq_filetype[mpeg]=video/mpeg;
$this->xlq_filetype[mpg]=video/mpeg;
$this->xlq_filetype[mpe]=video/mpeg;
$this->xlq_filetype[avi]=video/x-msvideo;
$this->xlq_filetype[qt]=video/quicktime;
$this->xlq_filetype[mov]=video/quicktime;
$this->xlq_filetype[moov]=video/quicktime;
$this->xlq_filetype[movie]=video/x-sgi-movie;
$this->xlq_filetype[au]=audio/basic;
$this->xlq_filetype[snd]=audio/basic;
$this->xlq_filetype[wav]=audio/x-wav;
$this->xlq_filetype[aif]=audio/x-aiff;
$this->xlq_filetype[aiff]=audio/x-aiff;
$this->xlq_filetype[aifc]=audio/x-aiff;
$this->xlq_filetype[swf]=application/x-shockwave-flash;
}
}
?>