simple fireTV remote control PHP script

<?

/*
 * simple Amazon FireTV remote for any system running php (webserver)
 * needs: a PHP environment and adb installed
 * date: 2016-08-28
 * contact: heyer@linuxnutzer.de
 * idea from: http://www.aftvnews.com/how-to-remotely-control-an-amazon-fire-tv-or-fire-tv-stick-via-adb/
 *
 * instructions:
 * - install adb
 * - copy this script to your web-directory (e.g. /home/user/public_html/firetv)
 * - optional: place a .htaccess file allowing only local connections (e.g. /home/user/public_html/firetv/.htaccess)
 * - browse & set your bookmarks to e.g. http://localhost/~user/firetv/index.php?p=supersecret
 */


/*
 * configure this:
 */
 $default_password = "supersecret";
 $default_ip = "192.168.1.26";


/*
 * do not touch this:
 */


// error_reporting(E_ALL);
 error_reporting(E_ALL ^ E_NOTICE);
 ini_set("display_errors", 1);


// password
 $pass = "";
 if (isset($_POST['pass'])) {
  $pass = $_POST['pass'];
 }

 if (isset($_GET['p'])) {
  $pass = $_GET['p'];
 }

 $correct_password = FALSE;
 if ($pass == $default_password) {
  $correct_password = TRUE;
 }


// ip
 $ip = $default_ip;
 if (isset($_POST['ip'])) {
  $ip = $_POST['ip'];
 }
 if (isset($_POST['ip_new'])) {
  $ip = $_POST['ip_new'];
 }


//firetv commands as on http://developer.android.com/reference/android/view/KeyEvent.html
 $firetv_command = array(
     array("id"=>100,   "name"=>"CONNECT",  "value"=>0, "y"=>0, "x"=>1),
     array("id"=>102,   "name"=>"START-SERVER", "value"=>0, "y"=>0, "x"=>0),

     array("id"=>1, "name"=>"/\\",      "value"=>19,    "y"=>2, "x"=>1),
     array("id"=>2, "name"=>"<",        "value"=>21,    "y"=>3, "x"=>0),
     array("id"=>3, "name"=>"O",    "value"=>66,    "y"=>3, "x"=>1),
     array("id"=>4, "name"=>">",    "value"=>22,    "y"=>3, "x"=>2),
     array("id"=>5, "name"=>"\\/",      "value"=>20,    "y"=>4, "x"=>1),

     array("id"=>6, "name"=>"BACK",     "value"=>04,    "y"=>6, "x"=>0),
     array("id"=>7, "name"=>"HOME",     "value"=>03,    "y"=>6, "x"=>1),
     array("id"=>8, "name"=>"MENU",     "value"=>01,    "y"=>6, "x"=>2),

     array("id"=>9, "name"=>"PREVIOUS", "value"=>88,        "y"=>7, "x"=>0),
     array("id"=>10,    "name"=>"PLAY/PAUSE",   "value"=>85,    "y"=>7, "x"=>1),
     array("id"=>11,    "name"=>"NEXT",     "value"=>87,        "y"=>7, "x"=>2),

     array("id"=>101,   "name"=>"DISCONNECT",   "value"=>0, "y"=>9, "x"=>1),
     array("id"=>103,   "name"=>"STOP-SERVER",  "value"=>0, "y"=>9, "x"=>2)
 );

 $user_command_id = "";
 if (isset($_POST['u'])) {
  $user_command_id = key($_POST['u']);  //  _debug($user_command_id);

  $user_command = 0;
    foreach ((array) $firetv_command as $key => $val) {
        if ( ($val['id']==$user_command_id)) {
            $user_command   = $key;
        }
    }
  _execute_command($firetv_command[$user_command], $ip);
 }


?>

<HTML>

<HEAD>
<TITLE>fireTV remote</TITLE>
</HEAD>
<BODY BGCOLOR="#ffffff" TEXT="#000000" LINK="#000000" ALINK="#000000" VLINK="#000000" TOPMARGIN=0 LEFTMARGIN=0 MARGINWIDTH=0 MARGINHEIGHT=0>
<CENTER><TABLE BORDER=0 WIDTH="100%" HEIGHT="100%" BGCOLOR="#ffffff"><TR><TD><CENTER>
<CENTER><TABLE BORDER=0 BGCOLOR="#aaccff"><TR><TD><CENTER>
<H1>fireTV remote</H1>

<?
 if ( $correct_password == FALSE) {
  echo "wrong password";
  exit(1);
 }

 echo "<FORM ACTION=\"".$_SERVER['PHP_SELF']."\" enctype=\"multipart/form-data\" method=\"POST\">\n";
 echo "<input type=\"hidden\" name=\"pass\" value=\"".$pass."\">\n";
 echo "<input type=\"hidden\" name=\"ip\" value=\"".$ip."\">\n";
 echo "fireTV ip: <input type=\"input\" name=\"ip_new\" value=\"".$ip."\"><BR>\n";

 $output = shell_exec("adb connect ".$ip); _debug($output);
// if you want you can list all connected devices:
// $output = shell_exec("adb devices"); _debug($output);

 _show_grid($firetv_command);   // I know I should use CSS here, but I am oldsk00l

?>

</FORM>

</CENTER></TD></TR></TABLE></CENTER>
</CENTER></TD></TR></TABLE></CENTER>
</BODY>
</HTML>

<?


function _execute_command (
    $command,
    $ip
) {
//  _debug($command);

//http://php.net/manual/de/function.shell-exec.php

    switch ($command['id']) {
        case 100:
            $output = shell_exec("adb connect ".$ip);
        //  _debug($output);
            break;
        case 101:
            $output = shell_exec("adb disconnect ".$ip);
        //  _debug($output);
            break;
        case 102:
            $output = shell_exec("adb start-server");
        //  _debug($output);
            break;
        case 103:
            $output = shell_exec("adb kill-server");
        //  _debug($output);
            break;
        case ($command['id']<100):
        //  _debug('normal: '.$command['name']);
            $output = shell_exec("adb connect ".$ip);
            $output = shell_exec("adb shell input keyevent ".$command['value']);
        //  _debug($output);
            break;

        default:
            _debug('unknown command');
            break;

    }   // switch
    return 0;
}

function _debug (
    $my_array
) {
    echo "<pre>\n";
    print_r($my_array);
    echo "</pre>\n";
    return 0;
}


function _show_grid (
    $my_array
) {
    $HEIGHT = 10;
    $WIDTH = 3;

    echo "<TABLE BORDER=0 WIDTH=100% COLS=".$WIDTH." ROWS=".$HEIGHT.">\n";

    for ($y=0; $y<$HEIGHT; $y++) {
        echo "<TR>\n";
        for ($x=0; $x<$WIDTH; $x++) {
            $value = "&nbsp;";
            foreach ((array) $my_array as $key => $val) {
                if ( ($val['y']==$y) &&  ($val['x']==$x)) {
                    $value = "<input type=\"submit\" name=\"u[".$val['id']."]\" value=\"".$val['name']."\">\n";
                }
            }
            echo "<TD><CENTER>".$value."</CENTER></TD>\n";
        }   // for x
        echo "</TR>\n";
    }   // for y
    echo "</TABLE>\n";
    return 0;
}

?>