This download script is capable of downloading very large files (MBs or GBs). Also make sure that you set the ini settings as tomit said. For massively large files, it's usually better to use X-Sendfile method in PHP. Learn more here. Anyway, I post the working code. Maybe it's useful for people looking for error-free, working script. Script is taken from PHPsnips, hope you find it useful.
/**
* @author Jack Mason
* @website volunteer @ http://www.osipage.com, web access application and bookmarking tool.
* @copyright Free script, use anywhere as you like, no attribution required
*/
/* You may need these ini settings too */
set_time_limit(0);
ini_set('memory_limit', '512M');
//THE DOWNLOAD SCRIPT
$filePath = "D:/Software/versions/windows/windows_7.rar"; // set your download file path here.
download($filePath); // calls download function
function download($filePath)
{
if(!empty($filePath))
{
$fileInfo = pathinfo($filePath);
$fileName = $fileInfo['basename'];
$fileExtnesion = $fileInfo['extension'];
$default_contentType = "application/octet-stream";
$content_types_list = mimeTypes();
// to find and use specific content type, check out this IANA page : http://www.iana.org/assignments/media-types/media-types.xhtml
if (array_key_exists($fileExtnesion, $content_types_list))
{
$contentType = $content_types_list[$fileExtnesion];
}
else
{
$contentType = $default_contentType;
}
if(file_exists($filePath))
{
$size = filesize($filePath);
$offset = 0;
$length = $size;
//HEADERS FOR PARTIAL DOWNLOAD FACILITY BEGINS
if(isset($_SERVER['HTTP_RANGE']))
{
preg_match('/bytes=(\d+)-(\d+)?/', $_SERVER['HTTP_RANGE'], $matches);
$offset = intval($matches[1]);
$length = intval($matches[2]) - $offset;
$fhandle = fopen($filePath, 'r');
fseek($fhandle, $offset); // seek to the requested offset, this is 0 if it's not a partial content request
$data = fread($fhandle, $length);
fclose($fhandle);
header('HTTP/1.1 206 Partial Content');
header('Content-Range: bytes ' . $offset . '-' . ($offset + $length) . '/' . $size);
}//HEADERS FOR PARTIAL DOWNLOAD FACILITY BEGINS
//USUAL HEADERS FOR DOWNLOAD
header("Content-Disposition: attachment;filename=".$fileName);
header('Content-Type: '.$contentType);
header("Accept-Ranges: bytes");
header("Pragma: public");
header("Expires: -1");
header("Cache-Control: no-cache");
header("Cache-Control: public, must-revalidate, post-check=0, pre-check=0");
header("Content-Length: ".filesize($filePath));
$chunksize = 8 * (1024 * 1024); //8MB (highest possible fread length)
if ($size > $chunksize)
{
$handle = fopen($_FILES["file"]["tmp_name"], 'rb');
$buffer = '';
while (!feof($handle) && (connection_status() === CONNECTION_NORMAL))
{
$buffer = fread($handle, $chunksize);
print $buffer;
ob_flush();
flush();
}
if(connection_status() !== CONNECTION_NORMAL)
{
echo "Connection aborted";
}
fclose($handle);
}
else
{
ob_clean();
flush();
readfile($filePath);
}
}
else
{
echo 'File does not exist!';
}
}
else
{
echo 'There is no file to download!';
}
}
/* Function to get correct MIME type for download */
function mimeTypes()
{
/* Just add any required MIME type if you are going to download something not listed here.*/
$mime_types = array("323" => "text/h323",
"acx" => "application/internet-property-stream",
"ai" => "application/postscript",
"aif" => "audio/x-aiff",
"aifc" => "audio/x-aiff",
"aiff" => "audio/x-aiff",
"asf" => "video/x-ms-asf",
"asr" => "video/x-ms-asf",
"asx" => "video/x-ms-asf",
"au" => "audio/basic",
"avi" => "video/x-msvideo",
"axs" => "application/olescript",
"bas" => "text/plain",
"bcpio" => "application/x-bcpio",
"bin" => "application/octet-stream",
"bmp" => "image/bmp",
"c" => "text/plain",
"cat" => "application/vnd.ms-pkiseccat",
"cdf" => "application/x-cdf",
"cer" => "application/x-x509-ca-cert",
"class" => "application/octet-stream",
"clp" => "application/x-msclip",
"cmx" => "image/x-cmx",
"cod" => "image/cis-cod",
"cpio" => "application/x-cpio",
"crd" => "application/x-mscardfile",
"crl" => "application/pkix-crl",
"crt" => "application/x-x509-ca-cert",
"csh" => "application/x-csh",
"css" => "text/css",
"dcr" => "application/x-director",
"der" => "application/x-x509-ca-cert",
"dir" => "application/x-director",
"dll" => "application/x-msdownload",
"dms" => "application/octet-stream",
"doc" => "application/msword",
"dot" => "application/msword",
"dvi" => "application/x-dvi",
"dxr" => "application/x-director",
"eps" => "application/postscript",
"etx" => "text/x-setext",
"evy" => "application/envoy",
"exe" => "application/octet-stream",
"fif" => "application/fractals",
"flr" => "x-world/x-vrml",
"gif" => "image/gif",
"gtar" => "application/x-gtar",
"gz" => "application/x-gzip",
"h" => "text/plain",
"hdf" => "application/x-hdf",
"hlp" => "application/winhlp",
"hqx" => "application/mac-binhex40",
"hta" => "application/hta",
"htc" => "text/x-component",
"htm" => "text/html",
"html" => "text/html",
"htt" => "text/webviewhtml",
"ico" => "image/x-icon",
"ief" => "image/ief",
"iii" => "application/x-iphone",
"ins" => "application/x-internet-signup",
"isp" => "application/x-internet-signup",
"jfif" => "image/pipeg",
"jpe" => "image/jpeg",
"jpeg" => "image/jpeg",
"jpg" => "image/jpeg",
"js" => "application/x-javascript",
"latex" => "application/x-latex",
"lha" => "application/octet-stream",
"lsf" => "video/x-la-asf",
"lsx" => "video/x-la-asf",
"lzh" => "application/octet-stream",
"m13" => "application/x-msmediaview",
"m14" => "application/x-msmediaview",
"m3u" => "audio/x-mpegurl",
"man" => "application/x-troff-man",
"mdb" => "application/x-msaccess",
"me" => "application/x-troff-me",
"mht" => "message/rfc822",
"mhtml" => "message/rfc822",
"mid" => "audio/mid",
"mny" => "application/x-msmoney",
"mov" => "video/quicktime",
"movie" => "video/x-sgi-movie",
"mp2" => "video/mpeg",
"mp3" => "audio/mpeg",
"mpa" => "video/mpeg",
"mpe" => "video/mpeg",
"mpeg" => "video/mpeg",
"mpg" => "video/mpeg",
"mpp" => "application/vnd.ms-project",
"mpv2" => "video/mpeg",
"ms" => "application/x-troff-ms",
"mvb" => "application/x-msmediaview",
"nws" => "message/rfc822",
"oda" => "application/oda",
"p10" => "application/pkcs10",
"p12" => "application/x-pkcs12",
"p7b" => "application/x-pkcs7-certificates",
"p7c" => "application/x-pkcs7-mime",
"p7m" => "application/x-pkcs7-mime",
"p7r" => "application/x-pkcs7-certreqresp",
"p7s" => "application/x-pkcs7-signature",
"pbm" => "image/x-portable-bitmap",
"pdf" => "application/pdf",
"pfx" => "application/x-pkcs12",
"pgm" => "image/x-portable-graymap",
"pko" => "application/ynd.ms-pkipko",
"pma" => "application/x-perfmon",
"pmc" => "application/x-perfmon",
"pml" => "application/x-perfmon",
"pmr" => "application/x-perfmon",
"pmw" => "application/x-perfmon",
"pnm" => "image/x-portable-anymap",
"pot" => "application/vnd.ms-powerpoint",
"ppm" => "image/x-portable-pixmap",
"pps" => "application/vnd.ms-powerpoint",
"ppt" => "application/vnd.ms-powerpoint",
"prf" => "application/pics-rules",
"ps" => "application/postscript",
"pub" => "application/x-mspublisher",
"qt" => "video/quicktime",
"ra" => "audio/x-pn-realaudio",
"ram" => "audio/x-pn-realaudio",
"ras" => "image/x-cmu-raster",
"rgb" => "image/x-rgb",
"rmi" => "audio/mid",
"roff" => "application/x-troff",
"rtf" => "application/rtf",
"rtx" => "text/richtext",
"scd" => "application/x-msschedule",
"sct" => "text/scriptlet",
"setpay" => "application/set-payment-initiation",
"setreg" => "application/set-registration-initiation",
"sh" => "application/x-sh",
"shar" => "application/x-shar",
"sit" => "application/x-stuffit",
"snd" => "audio/basic",
"spc" => "application/x-pkcs7-certificates",
"spl" => "application/futuresplash",
"src" => "application/x-wais-source",
"sst" => "application/vnd.ms-pkicertstore",
"stl" => "application/vnd.ms-pkistl",
"stm" => "text/html",
"svg" => "image/svg+xml",
"sv4cpio" => "application/x-sv4cpio",
"sv4crc" => "application/x-sv4crc",
"t" => "application/x-troff",
"tar" => "application/x-tar",
"tcl" => "application/x-tcl",
"tex" => "application/x-tex",
"texi" => "application/x-texinfo",
"texinfo" => "application/x-texinfo",
"tgz" => "application/x-compressed",
"tif" => "image/tiff",
"tiff" => "image/tiff",
"tr" => "application/x-troff",
"trm" => "application/x-msterminal",
"tsv" => "text/tab-separated-values",
"txt" => "text/plain",
"uls" => "text/iuls",
"ustar" => "application/x-ustar",
"vcf" => "text/x-vcard",
"vrml" => "x-world/x-vrml",
"wav" => "audio/x-wav",
"wcm" => "application/vnd.ms-works",
"wdb" => "application/vnd.ms-works",
"wks" => "application/vnd.ms-works",
"wmf" => "application/x-msmetafile",
"wps" => "application/vnd.ms-works",
"wri" => "application/x-mswrite",
"wrl" => "x-world/x-vrml",
"wrz" => "x-world/x-vrml",
"xaf" => "x-world/x-vrml",
"xbm" => "image/x-xbitmap",
"xla" => "application/vnd.ms-excel",
"xlc" => "application/vnd.ms-excel",
"xlm" => "application/vnd.ms-excel",
"xls" => "application/vnd.ms-excel",
"xlt" => "application/vnd.ms-excel",
"xlw" => "application/vnd.ms-excel",
"xof" => "x-world/x-vrml",
"xpm" => "image/x-xpixmap",
"xwd" => "image/x-xwindowdump",
"z" => "application/x-compress",
"rar" => "application/x-rar-compressed",
"zip" => "application/zip");
return $mime_types;
}
?>
