Unnamed

<?php

function readfile_chunked($filename,$retbytes=true){
	$chunksize = 1*(1024*1024); // how many bytes per chunk
	$buffer = '';
	$cnt =0;
	// $handle = fopen($filename, 'rb');
	$handle = fopen($filename, 'rb');
	stream_set_blocking($handle, 0);
	if ($handle === false){
		return false;
	}
	while (!feof($handle)){
		$buffer = fread($handle, $chunksize);
		echo $buffer;
		if ($retbytes){
			$cnt += strlen($buffer);
		}
	}
	$status = fclose($handle);
	if ($retbytes && $status){
		return $cnt; // return num. bytes delivered like readfile() does.
	}
	return $status;
}

function dl_file($file){
	//First, see if the file exists
	if (!is_file($file)) { die("<b>404 File not found!</b>"); }

	//Gather relevent info about file
	$len = filesize($file);
	$filename = basename($file);
	$file_extension = strtolower(substr(strrchr($filename,"."),1));
	
	//This will set the Content-Type to the appropriate setting for the file
	switch( $file_extension ) {
		case "mp3": $ctype="audio/mpeg"; break;
		case "wav": $ctype="audio/x-wav"; break;
		case "wma": $ctype="audio/x-ms-wma"; break;
		case "ra": $ctype="audio/vnd.rn-realaudio"; break;
		case "ogg" : $ctype="application/ogg"; break;
		case "zip": $ctype="application/zip"; break;
		case "rar": $ctype="application/x-rar-compressed"; break;
		case "exe": $ctype="application/octet-stream"; break;
		case "mpeg":
		case "mpg":
		case "mpe": $ctype="video/mpeg"; break;
		case "mp4": $ctype="video/mp4"; break;
		case "mov": $ctype="video/quicktime"; break;
		case "wmv": $ctype="video/x-ms-wmv"; break;
		case "avi": $ctype="video/x-msvideo"; break;

		//The following are for extensions that shouldn't be downloaded (sensitive stuff, like php files)
		case "php":
		case "htm":
		case "html":
		case "txt":
		default: die("<b>Cannot be used for ". $file_extension ." files!</b>");
	}

	//Begin writing headers
	header("Pragma: public");
	header("Expires: 0");
	header("Cache-Control: must-revalidate, post-check=0, pre-check=0");
	header("Cache-Control: public");
	header("Content-Description: File Transfer");

	//Use the switch-generated Content-Type
	header("Content-Type: $ctype");

	//Force the download
	$header="Content-Disposition: attachment; filename=".$filename.";";
	header($header);
	header("Content-Transfer-Encoding: binary");
	header("Content-Length: ".$len);
	
	readfile_chunked($file);
	//@readfile($file);
}

?>