php文件下载类

Dear 丶 2022-01-21 00:11 332阅读 0赞

php文件下载类

<? 
    //==================================================== 
    // 使用范例： 
    // $download=new download('php,exe,html',false); 
    // if(!$download->downloadfile($filename)) 
    // { 
    // echo $download->geterrormsg(); 
    // } 
    //==================================================== 
    class download{ 
    var $debug=true; 
    var $errormsg=''; 
    var $Filter=array(); 
    var $filename=''; 
    var $mineType='text/plain'; 
    var $xlq_filetype=array(); 
    
    function download($fileFilter='',$isdebug=true) 
    { 
    $this->setFilter($fileFilter); 
    $this->setdebug($isdebug); 
    $this->setfiletype(); 
    } 
    
    function setFilter($fileFilter) 
    { 
    if(empty($fileFilter)) return ; 
    $this->Filter=explode(',',strtolower($fileFilter)); 
    } 
    function setdebug($debug) 
    { 
    $this->debug=$debug; 
    } 
    
    function setfilename($filename) 
    { 
    $this->filename=$filename; 
    } 
    
    function downloadfile($filename) 
    { 
    $this->setfilename($filename); 
    if($this->filecheck()) 
    { 
    $fn = array_pop( explode( '/', strtr( $this->filename, '\\', '/' ) ) ); 
    header( "Pragma: public" ); 
    header( "Expires: 0" ); // set expiration time 
    header( "Cache-Component: must-revalidate, post-check=0, pre-check=0" ); 
    header( "Content-type:".$this->mineType ); 
    header( "Content-Length: " . filesize( $this->filename ) ); 
    header( "Content-Disposition: attachment; filename=\"$fn\"" ); 
    header( 'Content-Transfer-Encoding: binary' ); 
    readfile( $this->filename ); 
    return true; 
    }else 
    { 
    return false; 
    } 
    } 
    function geterrormsg() 
    { 
    return $this->errormsg; 
    } 
    
    function filecheck() 
    { 
    $filename=$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！') ; 
    return false; 
    }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)) 
    return true; 
    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'); 
    return false; 
    } 
    } 
    }else 
    { 
    $this->errormsg.=$filename.'不存在!'; 
    if($this->debug) exit($filename.'不存在!') ; 
    return false; 
    } 
    } 
    
    function setfiletype() 
    { 
    $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"; 
    } 
    } 
    ?>