<?php
function output_file($file, $name, $mime_type='')
{
	/*
	 This function takes a path to a file to output ($file),  the filename that the browser will see ($name) and  the MIME type of the file ($mime_type, optional).
	 */

	//Check the file premission
	if(!is_readable($file)) die($file);

	$size = filesize($file);
	$name = rawurldecode($name);

	/* Figure out the MIME type | Check in array */
	$known_mime_types=array(
		"pdf" => "application/pdf",
		"txt" => "text/plain",
		"html" => "text/html",
		"htm" => "text/html",
		"exe" => "application/octet-stream",
		"zip" => "application/zip",
		"doc" => "application/msword",
		"xls" => "application/vnd.ms-excel",
		"ppt" => "application/vnd.ms-powerpoint",
		"gif" => "image/gif",
		"png" => "image/png",
		"jpeg"=> "image/jpg",
		"jpg" =>  "image/jpg",
		"php" => "text/plain"
	);

	if($mime_type==''){
		$file_extension = strtolower(substr(strrchr($file,"."),1));
		if(array_key_exists($file_extension, $known_mime_types)){
			$mime_type=$known_mime_types[$file_extension];
		} else {
			$mime_type="application/force-download";
		};
	};

	//turn off output buffering to decrease cpu usage
	@ob_end_clean();

	// required for IE, otherwise Content-Disposition may be ignored
	if(ini_get('zlib.output_compression'))
		ini_set('zlib.output_compression', 'Off');

	header('Content-Type: ' . $mime_type);
	header('Content-Disposition: attachment; filename="'.$name.'"');
	header("Content-Transfer-Encoding: binary");
	header('Accept-Ranges: bytes');

	/* The three lines below basically make the
		download non-cacheable */
	header("Cache-control: private");
	header('Pragma: private');
	header("Expires: Mon, 26 Jul 1997 05:00:00 GMT");

	// multipart-download and download resuming support
	if(isset($_SERVER['HTTP_RANGE']))
	{
		list($a, $range) = explode("=",$_SERVER['HTTP_RANGE'],2);
		list($range) = explode(",",$range,2);
		list($range, $range_end) = explode("-", $range);
		$range=intval($range);
		if(!$range_end) {
			$range_end=$size-1;
		} else {
			$range_end=intval($range_end);
		}

		$new_length = $range_end-$range+1;
		header("HTTP/1.1 206 Partial Content");
		header("Content-Length: $new_length");
		header("Content-Range: bytes $range-$range_end/$size");
	} else {
		$new_length=$size;
		header("Content-Length: ".$size);
	}

	/* Will output the file itself */
	$chunksize = 1*(1024*1024); //you may want to change this
	$bytes_send = 0;
	if ($file = fopen($file, 'r'))
	{
		if(isset($_SERVER['HTTP_RANGE']))
			fseek($file, $range);

		while(!feof($file) &&
			(!connection_aborted()) &&
			($bytes_send<$new_length)
		)
		{
			$buffer = fread($file, $chunksize);
			print($buffer); //echo($buffer); // can also possible
			flush();
			$bytes_send += strlen($buffer);
		}
		fclose($file);
	} else
		//If no permissiion
	die('Error - can not open file.');
	//die
	die();
}
//Set the time out
set_time_limit(0);

//path to the file
$file_path=$_SERVER['DOCUMENT_ROOT'].'/KAIHATSU/itojuku/log_processor/'.$_REQUEST['filename'];


//Call the download function with file path,file name and file type
output_file($file_path, ''.$_REQUEST['filename'].'', 'text/plain');