Receive Java Socket in PHP - php

Question

I've got the following problem:
I just created a new Socket connection and told my mediaRecorder to send its recorded data via socket:
Socket soc=null;
try {
soc = new Socket("192.168.178.103",8888);
Log.i(TAG, "Connected to socket");
} catch (Exception e) {
}
ParcelFileDescriptor pfd = ParcelFileDescriptor.fromSocket(soc);
myCamera = getCameraInstance();
mediaRecorder = new MediaRecorder();
myCamera.unlock();
mediaRecorder.setCamera(myCamera);
mediaRecorder.setAudioSource(MediaRecorder.AudioSource.CAMCORDER);
mediaRecorder.setVideoSource(MediaRecorder.VideoSource.CAMERA);
mediaRecorder.setProfile(CamcorderProfile.get(CamcorderProfile.QUALITY_LOW));
mediaRecorder.setOutputFile(pfd.getFileDescriptor());
.
.
.
I have the following php test code from http://www.binarytides.com/udp-socket-programming-in-php/:
<?php
//Reduce errors
error_reporting(~E_WARNING);
//Create a UDP socket
if(!($sock = socket_create(AF_INET, SOCK_DGRAM, 0)))
{
$errorcode = socket_last_error();
$errormsg = socket_strerror($errorcode);
die("Couldn't create socket: [$errorcode] $errormsg \n");
}
echo "Socket created \n";
// Bind the source address
if( !socket_bind($sock, "192.168.178.103" , 8888) )
{
$errorcode = socket_last_error();
$errormsg = socket_strerror($errorcode);
die("Could not bind socket : [$errorcode] $errormsg \n");
}
echo "Socket bind OK \n";
//Do some communication, this loop can handle multiple clients
while(1)
{
echo "Waiting for data ... \n";
//Receive some data
$r = socket_recvfrom($sock, $buf, 512, 0, $remote_ip, $remote_port);
echo "$remote_ip : $remote_port -- " . $buf;
//Send back the data to the client
socket_sendto($sock, "OK " . $buf , 100 , 0 , $remote_ip , $remote_port);
}
socket_close($sock);
I just tested around when i just write something like "procedured" in a file when my index.php on the server side is called. It works, but with this code my socket does not receive any data.
Do you have a clue for me?
Thank you!