<?php

/**

 * Description of VideoStream

 *

 * @author Rana

 * @link http://codesamplez.com/programming/php-html5-video-streaming-tutorial

 */

classVideoStream

{

private$path = "";

private$stream = "";

private$buffer = 102400;

private$start  = -1;

private$end    = -1;

private$size   = 0;

function__construct($filePath)

    {

$this->path = $filePath;

    }

/**

     * Open stream

     */

privatefunctionopen()

    {

if (!($this->stream = fopen($this->path, 'rb'))) {

die('Could not open stream for reading');

        }

    }

/**

     * Set proper header to serve the video content

     */

privatefunctionsetHeader()

    {

ob_get_clean();

header("Content-Type: video/mp4");

header("Cache-Control: max-age=2592000, public");

header("Expires: ".gmdate('D, d M Y H:i:s', time()+2592000) . ' GMT');

header("Last-Modified: ".gmdate('D, d M Y H:i:s', @filemtime($this->path)) . ' GMT' );

$this->start = 0;

$this->size  = filesize($this->path);

$this->end   = $this->size - 1;

header("Accept-Ranges: 0-".$this->end);

if (isset($_SERVER['HTTP_RANGE'])) {

$c_start = $this->start;

$c_end = $this->end;

list(, $range) = explode('=', $_SERVER['HTTP_RANGE'], 2);

if (strpos($range, ',') !== false) {

header('HTTP/1.1 416 Requested Range Not Satisfiable');

header("Content-Range: bytes $this->start-$this->end/$this->size");

                exit;

            }

if ($range == '-') {

$c_start = $this->size - substr($range, 1);

            }else{

$range = explode('-', $range);

$c_start = $range[0];

$c_end = (isset($range[1]) &&is_numeric($range[1])) ? $range[1] : $c_end;

            }

$c_end = ($c_end>$this->end) ?$this->end : $c_end;

if ($c_start>$c_end || $c_start>$this->size - 1 || $c_end>= $this->size) {

header('HTTP/1.1 416 Requested Range Not Satisfiable');

header("Content-Range: bytes $this->start-$this->end/$this->size");

                exit;

            }

$this->start = $c_start;

$this->end = $c_end;

$length = $this->end - $this->start + 1;

fseek($this->stream, $this->start);

header('HTTP/1.1 206 Partial Content');

header("Content-Length: ".$length);

header("Content-Range: bytes $this->start-$this->end/".$this->size);

        }

else

        {

header("Content-Length: ".$this->size);

        } 

    }

/**

     * close curretly opened stream

     */

privatefunctionend()

    {

fclose($this->stream);

        exit;

    }

/**

     * perform the streaming of calculated range

     */

privatefunctionstream()

    {

$i = $this->start;

set_time_limit(0);

while(!feof($this->stream) &&$i<= $this->end) {

$bytesToRead = $this->buffer;

if(($i+$bytesToRead) >$this->end) {

$bytesToRead = $this->end - $i + 1;

            }

$data = fread($this->stream, $bytesToRead);

echo$data;

flush();

$i += $bytesToRead;

        }

    }

/**

     * Start streaming video content

     */

functionstart()

    {

$this->open();

$this->setHeader();

$this->stream();

$this->end();

    }

}

?>