PHP Send data

PHP Send File
function SendFile ($fileName, $fancyName = ", $forceDownload = true, $speedLimit = 0, $contentType =")
{
if (!is_readable ($fileName))
{
Header ("http/1.1 404 Not Found");
return false;
}


$fileStat = stat ($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 ($_server[' http_if_unmodified_since ')) && strtotime ($_server[' http_if_unmodified_since ']) < $ LastModified)
{
Header ("http/1.1 304 not Modified");
return true;
}


if (Isset ($_server[' Http_if_none_match ')) && $_server[' http_if_none_match '] = = $etag)
{
Header ("http/1.1 304 not Modified");
return true;
}


if ($fancyName = = ")
{
$fancyName = basename ($fileName);
}


if ($contentType = = ")
{
$contentType = ' Application/octet-stream ';
}


$fileSize = $fileStat [' Size '];


$contentLength = $fileSize;
$isPartial = false;


if (Isset ($_server[' Http_range '))
{
if (Preg_match ('/^bytes= (\d*)-(\d*) $/', $_server[' Http_range '], $matches))
{
$startPos = $matches [1];
$endPos = $matches [2];


if ($startPos = = "&& $endPos = =")
{
return false;
}


if ($startPos = = ")
{
$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;


if ($length < 0)
{
return false;
}


$contentLength = $length;
$isPartial = true;
}
}


Send headers
if ($isPartial)
{
Header (' http/1.1 206 Partial Content ');
Header ("Content-range:bytes $startPos-$endPos/$fileSize");


}
Else
{
Header ("http/1.1 OK");
$startPos = 0;
$endPos = $contentLength-1;
}


Header (' Pragma:cache ');
Header (' Cache-control:public, must-revalidate, max-age=0 ');
Header (' accept-ranges:bytes ');
Header (' Content-type: '. $contentType);
Header (' Content-length: '. $contentLength);


if ($forceDownload)
{
Header (' content-disposition:attachment; Filename= '. Rawurlencode ($fancyName). '"');
}


Header ("Content-transfer-encoding:binary");


$bufferSize = 2048;


if ($speedLimit! = 0)
{
$packetTime = Floor ($bufferSize * 1000000/$speedLimit);
}


$bytesSent = 0;
$fp = fopen ($fileName, "RB");
Fseek ($fp, $startPos);


Fpassthru ($FP);


while ($bytesSent < $contentLength &&!feof ($fp) && connection_status () = = 0)
{
if ($speedLimit! = 0)
{
List ($usec, $sec) = Explode ("", Microtime ());
$outputTimeStart = ((float) $usec + (float) $sec);
}


$readBufferSize = $contentLength-$bytesSent < $bufferSize? $contentLength-$bytesSent: $bufferSize;
$buffer = Fread ($fp, $readBufferSize);


Echo $buffer;


Ob_flush ();
Flush ();


$bytesSent + = $readBufferSize;


if ($speedLimit! = 0)
{
List ($usec, $sec) = Explode ("", Microtime ());
$outputTimeEnd = ((float) $usec + (float) $sec);


$useTime = ((float) $outputTimeEnd-(float) $outputTimeStart) * 1000000;
$sleepTime = Round ($packetTime-$useTime);
if ($sleepTime > 0)
{
Usleep ($sleepTime);
}
}
}




return true;
}
SendFile ('.. /document.zip ', ' document.zip ');
?>

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