resume and section support in php - php

Question

sorry if this is not a new question but i'm really stuck in this problem. I'm using script below for downloading a large file like a movie, I can not let user to access direct link of the file, also I need to let user download the file in a resume and section support manner. Using this code I just have resume support, not section. I'm using Yii framework.
Please Help me on this by any solution and suggestion.
public static function downloadFile($fileLocation, $saveName = null, $maxSpeed = 100, $doStream = false){
$start = 0;
$end = -1;
$section = false;
$extension = CFileHelper::getExtension($fileLocation);
$fileName = is_null($saveName) ? basename($fileLocation) : $saveName . '.' . $extension;
/* #var $contentType string mime type for the file, if is null, it will be octet-stream */
$contentType = CFileHelper::getMimeType($fileLocation);
$contentType = is_null($contentType) ? 'application/octet-stream' : $contentType;
if(isset($_SERVER['HTTP_RANGE']))
{
$range2 = substr($_SERVER['HTTP_RANGE'], strlen('bytes='));
$range = explode('-', $range2);
if($range[0] > 0)
$start = intval($range[0]);
if($range[1] > 0)
$end = intval($range[1]);
$section = true;
}
ob_end_clean();
$old_status = ignore_user_abort(true);
set_time_limit(0);
$size = filesize($fileLocation);
if($start > ($size -1)) $start = 0;
$fp = fopen($fileLocation, 'rb');
if($start) fseek($fp, $start);
if($end < $start) $end = $size -1;
header('Content-Type: '.$contentType);
$contentDisposition = 'attachment';
if($doStream == true){
$array_listen = array('mp3','m3u','m4a','mid','ogg','ra','ram','wm',
'wav','wma','aac','3gp','avi','mov','mp4','mpeg','mpg','swf','wmv','divx','asf');
if(in_array($extension,$array_listen)){
$contentDisposition = 'inline';
}
}
if (strstr($_SERVER['HTTP_USER_AGENT'], "MSIE")) {
$fileName= preg_replace('/\./', '%2e', $fileName, substr_count($fileName, '.') - 1);
header("Content-Disposition: $contentDisposition; filename=\"$fileName\"");
} else {
header("Content-Disposition: $contentDisposition; filename=\"$fileName\"");
}
header('Content-Disposition: ' . $contentDisposition . '; filename="' . $fileName . '"');
header('Last-Modified: ' . date('D, d M Y H:i:s \G\M\T', filemtime($fileLocation)));
if($section)
{
header("HTTP/1.0 206 Partial Content");
header("Status: 206 Partial Content");
header('Accept-Ranges: bytes');
header("Content-Range: bytes $start-$end/$size");
header("Content-Length: " . ($end - $start + 1));
}else
header('Content-Length: '.$size);
$size = $end - $start + 1;
while(!(connection_aborted() || connection_status() == 1) && !feof($fp))
{
print(fread($fp,1024*$maxSpeed));
flush();
ob_flush();
sleep(1);
}
fclose($fp);
ignore_user_abort($old_status);
set_time_limit(ini_get('max_execution_time'));
}

Answer 1

If you are using apache and able to install mods to it, you can use mod_xsendfile module. It supports partial downloads, cashing and other cool things.
Simple demo: Send Files Faster & Better with PHP & X-Sendfile