Samsung TV/DVR remote control in PHP. Protocol description here: http://sc0ty.pl/2012/02/samsung-tv-network-remote-control-protocol/

remote.php

<form action="remote.php" method="POST">
<input type="text" name="channel" value="<?php echo htmlspecialchars(@$_POST["channel"]) ?>"><input type="submit" name="go" value="Go">
</form>

<form action="remote.php" method="POST">
<input type="submit" name="key" value="KEY_1">
<input type="submit" name="key" value="KEY_2">
<input type="submit" name="key" value="KEY_3"><br>
<input type="submit" name="key" value="KEY_4">
<input type="submit" name="key" value="KEY_5">
<input type="submit" name="key" value="KEY_6"><br>
<input type="submit" name="key" value="KEY_7">
<input type="submit" name="key" value="KEY_8">
<input type="submit" name="key" value="KEY_9"><br>
<input type="submit" name="key" value="KEY_CHDOWN">
<input type="submit" name="key" value="KEY_0">
<input type="submit" name="key" value="KEY_CHUP">
<br><br>

<input type="submit" name="key" value="KEY_REC">
<input type="submit" name="key" value="KEY_STOP"><br>
<input type="submit" name="key" value="KEY_MUTE">
<input type="submit" name="key" value="KEY_GUIDE">
<input type="submit" name="key" value="KEY_MENU">
<br><br>

<table>
<tr><td><input type="submit" name="key" value="KEY_TOOLS"></td><td><input type="submit" name="key" value="KEY_UP"></td><td><input type="submit" name="key" value="KEY_INFO"></td></tr>
<tr><td><input type="submit" name="key" value="KEY_LEFT"></td><td><input type="submit" name="key" value="KEY_ENTER"></td><td><input type="submit" name="key" value="KEY_RIGHT"></td></tr>
<tr><td><input type="submit" name="key" value="KEY_RETURN"></td><td><input type="submit" name="key" value="KEY_DOWN"></td><td><input type="submit" name="key" value="KEY_EXIT"></td></tr>
</table>

</form>


<form action="remote.php" method="POST">
<input type="text" name="key" value="<?php echo htmlspecialchars(@$_POST["key"]) ?>"><input type="submit" value="OK">
</form>

<pre>
<?php
if(isset($_POST["go"])) goToChannel($_POST["channel"]);
if(isset($_POST["key"])) sendkey($_POST["key"]);

function goToChannel($channel){
	$numbers = str_split(str_pad($channel, 4, "0", STR_PAD_LEFT));
	foreach($numbers as $number){
		sendkey("KEY_".$number);
	}
}

// protocol description: http://sc0ty.pl/2012/02/samsung-tv-network-remote-control-protocol/
// list of key codes: http://wiki.samygo.tv/index.php5/D-Series_Key_Codes
function sendkey($key){
	$address = gethostbyname('10.0.0.6'); // IP of TV here
	
	$socket = socket_create(AF_INET, SOCK_STREAM, SOL_TCP);
	if($socket === false) echo "socket_create(): ".socket_strerror(socket_last_error())."\n";
	
	$result = socket_connect($socket, $address, 55000);
	if($result === false) echo "socket_connect(): ".socket_strerror(socket_last_error($socket))."\n";
	
	$packet = pack("C*",  0x00, 0x13, 0x00, 0x69, 0x70, 0x68, 0x6f, 0x6e, 0x65, 0x2e, 0x69, 0x61, 0x70, 0x70, 0x2e, 0x73,
	                      0x61, 0x6d, 0x73, 0x75, 0x6e, 0x67, 0x38, 0x00, 0x64, 0x00, 0x10, 0x00, 0x4d, 0x54, 0x41, 0x75,
	                      0x4d, 0x43, 0x34, 0x77, 0x4c, 0x6a, 0x49, 0x79, 0x4d, 0x67, 0x3d, 0x3d, 0x14, 0x00, 0x63, 0x6d,
	                      0x46, 0x75, 0x5a, 0x47, 0x39, 0x74, 0x55, 0x6d, 0x56, 0x74, 0x62, 0x33, 0x52, 0x6c, 0x53, 0x55,
	                      0x51, 0x3d, 0x0c, 0x00, 0x62, 0x58, 0x6c, 0x53, 0x5a, 0x57, 0x31, 0x76, 0x64, 0x47, 0x55, 0x3d);
	
	socket_write($socket, $packet);
	
	$keycode = base64_encode($key);
	
	$payload = pack("C*", 0x00, 0x00, 0x00, 0x00).pack("C*",strlen($keycode),0x00).$keycode;
	
	$packet = pack("C*",  0x00, 0x13, 0x00, 0x69, 0x70, 0x68, 0x6f, 0x6e, 0x65, 0x2e, 0x69, 0x61, 0x70, 0x70, 0x2e, 0x73,
	                      0x61, 0x6d, 0x73, 0x75, 0x6e, 0x67).pack("C*",strlen($payload)-1).$payload;
	socket_write($socket, $packet);
	
	socket_close($socket);
}

merci