Use header definition as file and then ReadFile download

  Sometimes in order to hide the real download address, we defined the header as a file and then readfile the download, but this will increase the burden on the server, generally do not recommend download a large number of files

The code is as follows: <?php    function SendFile ($fileName, $fancyName = ', $forceDownload = true, $speedLimit = 0, $conten Ttype = ')   {      if (!is_readable ($fileName))       {        &NBS P Header ("http/1.1 404 Not Found");          return false;     }    &NBSP ; $fileStat = stat ($fileName);      $lastModified = $fileStat [' mtime '];        $MD 5 = MD5 ($fileStat [' Mtime ']. " ='. $fileStat [' ino ']. ' ='. $fileStat [' size ']);      $etag = ' "'. $MD 5. '-' . CRC32 ($MD 5). ' "';      header (' last-modified: '. Gmdate ("D, D M Y h:i:s", $lastModified). ' GMT ');      Header ("ETag: $etag");        if (isset $_server[' http_if_modified_ SINCE ']) && strtotime ($_server[' http_if_modified_since ']) >= $lastModified)       {          Header ("http/1.1 304 not Modified ");          return true;     }      if (isset ' Http_if_unmodified_since ']) && strtotime ($_server[' http_if_unmodified_since ']) < $lastModified)       {          Header ("http/1.1 304 Not Modified");          R Eturn true;     }      if (isset ($_server[' Http_if_none_match ')) &&  $_ server[' http_if_none_match '] = = $etag)       {          Header ("http/1.1 304 not Mo Dified ");          return true;     }      if ($fancyName = =") &n Bsp     {          $fancyName = basename ($fileName);     }    &NB Sp   if ($contentType = = ")       {          $contentType = ' application/octet-s Tream ';     }&NBsp     $fileSize = $fileStat [' Size '];           $contentLength = $fileSize;      $isPartial = false;      if (Isset ($_server[' Http_range '))       {          if (Preg_match ('/^bytes= (d*)- (d*) $/', $_server[' Http_range '], $matches))           {           & nbsp     $startPos = $matches [1];              $endPos = $matches [2];              if ($startPos = = ' && $endPos = = ')               {                  return false;          &N Bsp  }                if ($startPos = = ")           &NB Sp   {                  $startPos $fileSize-$endPos;                  $endPos = $fileSize -1;             }              else if ($endPos = = ")               {                  $endPos = $fileSize-1 ;             }              $startPos = $startPos < 0? 0: $startPos;              $endPos = $endPos > $fileSize-1? $fileSize-1: $endPos;              $length = $endPos-$startPos + 1;    & nbsp         if ($length < 0)               {      &NBS P           return false;             }      &NB Sp       $ContentLength = $length;              $isPartial = true;        &NB Sp }     }       //Send headers      if ($isPartial)       {          header (' http/1.1 206 Partial Content ');          header ("Con Tent-range:bytes $startPos-$endPos/$fileSize ");       }      else     {&nbs P         Header ("http/1.1 OK");          $startPos = 0;    &NBSP ;     $endPos = $contentLength -1;     }      header (' Pragma:cache ');  &nbsp ;   Header (' Cache-control:public, must-revalidate, max-age=0 ');      header (' accept-ranges:bytes ') ;      Header (' Content-type: $contentType);      Header (' Content-length: '. $contentLen GTH);        if ($forceDownload)       {          header (' Content-disposition:att Achment; Filename= "'. Rawurlencode ($fancyName). //Chinese characters automatically convert to URL code     header (' content-disposition:attachment; Filename= "'. $fancyName. ' "');     }      header (" Content-transfer-encoding:binary ");        $ buffersize = 2048;      if ($speedLimit!= 0)       {          $pack Ettime = Floor ($bufferSize * 1000000/$speedLimit);     }      $bytesSent = 0;  &nbsp ;   $FP = fopen ($fileName, "RB");      fseek ($fp, $startPos);     //fpassthru ($FP); &nbs P       while ($bytesSent < $contentLength &&!feof ($fp) && connection_status () = = 0) &nbs P     {          if ($speedLimit!= 0)           {              list ($usec, $sec) = Explode ("", Microtime ());               $outputTimeStart = ((float) $usec + (float) $sec);      &NBS P  }          $readBufferSize = $contentLength-$bytesSent < $bufferSize? $contentLength-$bytesSent: $bufferSize;          $buffer = Fread ($fp, $readBufferSize);                 Echo $buffer;          Ob_flush ();          flush ();          $bytesSent + $readBufferSize;            if ($speedLimit!= 0)           {            &N Bsp List ($usec, $sec) = Explode ("", Microtime ());               $outputTimeEnd = ((float) $usec + (float) $sec);                $useTime = ((float) $outputTimeEnd-(float) $outputTimeStart) * 1000000;              $sleepTime = round ($packetTime-$useTime);              if ($sleepTime > 0) & nbsp             {                  Usleep ($sleepTim e);             }         }     }  &nbs P     return true; }   ?>       attached server response HTTP type contenttype Daquan: ". *" = "application/ Octet-stream "". 001 "=" application/x-001 "". "=" application/x-301 "". 323 "=" text/h323 "". 906 "=" application/x-906 "" .907 "=" drawing/907 "". A11 "=" application/x-a11 "". ACP "=" AUDIO/X-MEI-AAC "". Ai "=" application/postscript "". AIF "=" Audio/aiff "". Aifc = "Audio/aiff" ". Aiff" = "Audio/aiff" ". Anv" = "Application/x-anv" ". Asa" = "Text/asa" ". asf" = "video/ X-MS-ASF "". asp "=" text/asp "". asx "=" video/X-ms-asf "". Au "=" audio/basic "". avi "=" Video/avi "". Awf "=" Application/vnd.adobe.workflow "". Biz "=" Text/xml "". bmp "=" Application/x-bmp "". Bot = "Application/x-bot" ". c4t" = "application/x-c4t" ". C90" = "Application/x-c90" ". Cal" = " Application/x-cals "". Cat "=" Application/vnd.ms-pki.seccat "". CDF "=" APPLICATION/X-NETCDF "". Cdr "=" application/ X-cdr "". Cel = "Application/x-cel" ". cer" = "Application/x-x509-ca-cert" ". Cg4" = "Application/x-g4" ". CGM" = " APPLICATION/X-CGM "". cit = "application/x-cit" ". Class" = "java/*" ". CML" = "Text/xml" ". cmp" = "application/x-cmp" ". CMX" = "APPLICATION/X-CMX" ". Cot" = "Application/x-cot" ". CRL" = "application/pkix-crl" ". Crt" = "Application/x-x509-ca-cert" ". CSI" = "Application/x-csi" ". css" = "text/css" ". Cut" = "Application/x-cut" ". dbf" = "application/x-dbf" ". dbm" = " APPLICATION/X-DBM "". dbx = "Application/x-dbx" ". DCD" = "Text/xml" ". Dcx" = "Application/x-dcx" ". Der" = "application/ X-x509-ca-cert "". DGN = "Application/x-dgn" ". Dib" = "Application/x-dib" ". dll" = "Application/x-msdownload" ". Doc" = " AppliCation/msword "". Dot "=" Application/msword "". Drw "=" APPLICATION/X-DRW "". DTD "=" Text/xml "". DWF "=" MODEL/VND.DWF "". DWF "=" APPLICATION/X-DWF "". dwg "=" application/x-dwg "". Dxb "=" APPLICATION/X-DXB "". DXF "=" application/x-dxf "". Edn "=" Application/vnd.adobe.edn "". EMF = "APPLICATION/X-EMF" ". eml" = "message/rfc822" ". Ent" = "Text/xml" ". Epi" = " Application/x-epi "". EPS = "Application/x-ps" ". EPs" = "Application/postscript" ". etd" = "application/x-ebx" ". exe" = " Application/x-msdownload "". Fax = "Image/fax" ". Fdf" = "Application/vnd.fdf" ". Fif" = "Application/fractals" ". Fo" = " Text/xml "". frm = "Application/x-frm" ". G4" = "Application/x-g4" ". GBR" = "APPLICATION/X-GBR" ". gcd" = "application/x-gcd "". gif = "Image/gif" ". Gl2" = "Application/x-gl2" ". Gp4" = "Application/x-gp4" ". Hgl" = "Application/x-hgl" ". HMR" = " APPLICATION/X-HMR "". Hpg = "APPLICATION/X-HPGL" ". HPL" = "APPLICATION/X-HPL" ". hqx" = "application/mac-binhex40" ". HRF" = "APPLICATION/X-HRF" ". HTA" = "Application/hta" ". HTC" = "text/x-component" ". htm" = "text/html" ". html" = "text/htmL "". Htt "=" text/webviewhtml "". htx "=" text/html "". ICB "=" APPLICATION/X-ICB "". ico "=" Image/x-icon "". ico "=" Application/x-ico "". IFF "=" Application/x-iff "". Ig4 "=" Application/x-g4 "". IGs "=" Application/x-igs "". III "=" Application/x-iphone "". img "=" application/x-img "". Ins "=" Application/x-internet-signup "". ISP "=" application/ X-internet-signup "". IVF "=" VIDEO/X-IVF "". Java "=" java/* "". Jfif "=" Image/jpeg "". Jpe "=" Image/jpeg "". Jpe "=" Application/x-jpe "". jpeg "=" Image/jpeg "". jpg = "image/jpeg" ". jpg" = "application/x-jpg" ". js" = "Application/x-javascript" ". jsp" = "text/html". La1 "=" Audio/x-liquid-file "". Lar "=" Application/x-laplayer-reg "". Latex "=" Application/x-latex "". LAVs "=" audio/ X-liquid-secure "". LBM "=" APPLICATION/X-LBM "". Lmsff "=" Audio/x-la-lms "". ls "=" application/x-javascript "". Ltr "=" Application/x-ltr "". m1v = "Video/x-mpeg" ". m2v" = "Video/x-mpeg" ". m3u" = "Audio/mpegurl" ". m4e" = "VIDEO/MPEG4" ". Mac" = " Application/x-mac "". Man "=" Application/x-troff-man "". Math "=" Text/xml "". mdb "=" application/msaccesS "". mdb = "Application/x-mdb" ". MFP" = "Application/x-shockwave-flash" ". mht" = "message/rfc822" ". mhtml" = "message/ rfc822 "". Mi "=" Application/x-mi "". Mid "=" Audio/mid "". Midi "=" Audio/mid "". Mil "=" Application/x-mil "". MML "=" text/xml "". MND "=" Audio/x-musicnet-download "". MNs "=" Audio/x-musicnet-stream "". Mocha "=" Application/x-javascript "". Movie " = "Video/x-sgi-movie" ". Mp1" = "Audio/mp1" ". Mp2" = "AUDIO/MP2" ". mp2v" = "Video/mpeg" ". mp3" = "Audio/mp3" ". mp4" = "video/ MPEG4 "". MPa = "Video/x-mpg" ". MPD" = "Application/vnd.ms-project" ". Mpe" = "Video/x-mpeg" ". Mpeg" = "Video/mpg" ". mpg" = " Video/mpg "". MPGA = "Audio/rn-mpeg" ". MPP" = "Application/vnd.ms-project" ". MPs" = "video/x-mpeg" ". MPT" = "application/ Vnd.ms-project "". MPV "=" Video/mpg "". Mpv2 "=" Video/mpeg "". MPW "=" Application/vnd.ms-project "". MPX "=" application/ Vnd.ms-project "". MTx "=" Text/xml "". MXP "=" APPLICATION/X-MMXP "". Net "=" Image/pnetvue "". NRF "=" APPLICATION/X-NRF "". NWS "=" message/rfc822 "". odc "=" text/x-ms-odc "". Out "=" Application/x-out "". P10 "=" application/pkCs10 "". P12 = "Application/x-pkcs12" ". p7b" = "Application/x-pkcs7-certificates" ". p7c" = "Application/pkcs7-mime" ". p7m "=" Application/pkcs7-mime "". p7r "=" Application/x-pkcs7-certreqresp "". P7s "=" Application/pkcs7-signature "". Pc5 "=" "Application/x-pc5" ". PCI" = "Application/x-pci" ". PCL" = "APPLICATION/X-PCL" ". pcx" = "application/x-pcx" ". pdf" = " Application/pdf "". pdf = "Application/pdf" ". Pdx" = "Application/vnd.adobe.pdx" ". pfx" = "application/x-pkcs12" ". PGL" = "APPLICATION/X-PGL" ". Pic" = "Application/x-pic" ". Pko" = "Application/vnd.ms-pki.pko" ". pl" = "application/x-perl" ". PLG "=" text/html "". Pls "=" audio/scpls "". Plt "=" application/x-plt "". png "=" image/png "". png "=" application/x-png ". Pot "=" application/vnd.ms-powerpoint "". PPA "=" application/vnd.ms-powerpoint "". ppm "=" application/x-ppm "". pps "=" Application/vnd.ms-powerpoint "". ppt = "Application/vnd.ms-powerpoint" ". ppt" = "application/x-ppt" ". PR" = " APPLICATION/X-PR "". PRF "=" Application/pics-rules "". prn "=" application/x-prn "". Prt "=" application/x-prt "". PS "="Application/x-ps" ". PS" = "Application/postscript" ". Ptn" = "Application/x-ptn" ". Pwz" = "application/ Vnd.ms-powerpoint "". R3T = "Text/vnd.rn-realtext3d" ". Ra" = "Audio/vnd.rn-realaudio" ". Ram" = "Audio/x-pn-realaudio". Ras "=" Application/x-ras "". Rat "=" Application/rat-file "". RDF "=" Text/xml "". Rec "=" application/vnd.rn-recording "". Red "=" application/x-red "". RGB "=" Application/x-rgb "". RJs "=" Application/vnd.rn-realsystem-rjs "". Rjt "=" Application/vnd.rn-realsystem-rjt "". RLC "=" APPLICATION/X-RLC "". Rle "=" Application/x-rle "". Rm "=" application/ Vnd.rn-realmedia "". RMF = "APPLICATION/VND.ADOBE.RMF" ". Rmi" = "Audio/mid" ". Rmj" = "application/vnd.rn-realsystem-rmj "". Rmm "=" Audio/x-pn-realaudio "". RMP "=" Application/vnd.rn-rn_music_package "". RMS "=" application/ Vnd.rn-realmedia-secure "". rmvb "=" APPLICATION/VND.RN-REALMEDIA-VBR "". Rmx "=" APPLICATION/VND.RN-REALSYSTEM-RMX "". Rnx "=" Application/vnd.rn-realplayer "". RP "=" Image/vnd.rn-realpix "". RPM "=" Audio/x-pn-realaudio-plugin "". Rsml "=" APPLICATION/VND.RN-RSML "". RT "= "Text/vnd.rn-realtext" ". rtf" = "Application/msword" ". rtf" = "Application/x-rtf" ". RV" = "Video/vnd.rn-realvideo". Sam "=" Application/x-sam "". Sat "=" Application/x-sat "". SDP "=" APPLICATION/SDP "". Sdw "=" Application/x-sdw "". Sit "=" Application/x-stuffit "". SLB = "APPLICATION/X-SLB" ". SLD" = "APPLICATION/X-SLD" ". SLK" = "drawing/x-slk" ". Smi" = " Application/smil "". Smil "=" Application/smil "". SMK "=" APPLICATION/X-SMK "". snd "=" Audio/basic "". Sol "=" Text/plain "". Sor "=" Text/plain "". SPC "=" application/x-pkcs7-certificates "". SPL "=" Application/futuresplash "". spp "=" Text/xml "". SSM "=" Application/streamingmedia "". SST "=" Application/vnd.ms-pki.certstore "" ". StL" = "Application/vnd.ms-pki.stl" " . stm "=" text/html "". Sty "=" Application/x-sty "". svg "=" text/xml "". swf "=" Application/x-shockwave-flash "". TDF "=" Application/x-tdf "". TG4 "=" APPLICATION/X-TG4 "". TGA "=" application/x-tga "". tif "=" Image/tiff "" ". tif" = "application/ X-tif "". Tiff = "Image/tiff" ". TLD" = "Text/xml" ". Top" = "drawing/x-top" ". Torrent" = "Application/x-bittorreNT "". TSD = "Text/xml" ". txt" = "Text/plain" ". UIn" = "Application/x-icq" ". Uls" = "Text/iuls" ". vcf" = "Text/x-vcard" ". Vda" = "Application/x-vda" ". vdx" = "Application/vnd.visio" ". VML" = "Text/xml" ". VPg" = "application/x-vpeg005" ". Vsd" = " Application/vnd.visio "". Vsd "=" Application/x-vsd "". vss "=" Application/vnd.visio "". vst "=" Application/vnd.visio "". VST "=" Application/x-vst "". Vsw "=" Application/vnd.visio "". Vsx "=" Application/vnd.visio "". vtx "=" application/ Vnd.visio "". Vxml = "Text/xml" ". wav" = "audio/wav" ". Wax" = "audio/x-ms-wax" ". Wb1" = "application/x-wb1" ". Wb2" = " Application/x-wb2 "". Wb3 = "Application/x-wb3" ". Wbmp" = "Image/vnd.wap.wbmp" ". Wiz" = "Application/msword" ". Wk3" = " Application/x-wk3 "". Wk4 = "Application/x-wk4" ". Wkq" = "APPLICATION/X-WKQ" ". Wks" = "Application/x-wks" ". Wm" = "video/ X-MS-WM "". wma = "audio/x-ms-wma" ". WMD" = "APPLICATION/X-MS-WMD" ". Wmf" = "application/x-wmf" ". WML" = "text/vnd.wap.wml ". wmv" = "video/x-ms-wmv" ". Wmx" = "video/x-ms-wmx" ". wmz" = "Application/x-ms-wmz" ". Wp6" = "APPLICATION/X-WP6" ". wpd "=" APPLICATION/X-WPD "". WPG "=" APPLICATION/X-WPG "". WPL "=" APPLICATION/VND.MS-WPL "". Wq1 "=" application/x-wq1 "". Wr1 "=" Application/x-wr1 "". Wri "=" Application/x-wri "". Wrk "=" Application/x-wrk "". ws "=" Application/x-ws "". Ws2 "=" Application/x-ws "". WSC = "Text/scriptlet" ". wsdl" = "Text/xml" ". wvx" = "video/x-ms-wvx" ". Xdp" = "application/ VND.ADOBE.XDP "". XDR "=" Text/xml "". XfD "=" Application/vnd.adobe.xfd "". Xfdf "=" application/vnd.adobe.xfdf "". xhtml "= "Text/html" ". xls" = "application/vnd.ms-excel" ". xls" = "Application/x-xls" ". xlw" = "application/x-xlw" "". xml "=" text/ XML "". xPL = "Audio/scpls" ". Xq" = "Text/xml" ". Xql" = "Text/xml" ". XQuery" = "Text/xml" ". xsd" = "text/xml" ". xsl" = "text/xml "". xslt = "Text/xml" ". Xwd" = "application/x-xwd" ". X_b" = "Application/x-x_b" ". x_t" = "application/x-x_t"