สอบถามเรื่อง php socket เพื่อรับข้อมูลจากอุปกรณ์ภายนอกเข้ามาเก็บลงใน Server

<?php
// set some variables
$host = "122.155.13.143";
$port = 5364;


// don't timeout!
set_time_limit(0);

// create socket
$socket = socket_create(AF_INET, SOCK_STREAM, 0) or die("Could not create socket\n");

// bind socket to port
$result = socket_bind($socket, $host, $port) or die("Could not bind to socket\n");

// start listening for connections
$result = socket_listen($socket, 3) or die("Could not set up socket listener\n");


// accept incoming connections
// spawn another socket to handle communication
$spawn = socket_accept($socket) or die("Could not accept incoming connection\n");

// read client input
$input = socket_read($spawn, 1024) or die("Could not read input\n");

// clean up input string
$input = trim($input);
echo "Client Message : ".$input;


//Write data on text file --------
$fileName = "data.txt"; 
$fileopen = fopen($fileName, 'a+'); 
$write = $input."\r\n";
fwrite($fileopen, $write); 



fclose($fileopen);



// reverse client input and send back
$output = strrev($input) . "\n";
socket_write($spawn, $output, strlen ($output)) or die("Could not write output\n");

// close sockets
socket_close($spawn);
socket_close($socket);

?>

<?
$host    = "122.155.13.143";
$port    = 5364;

$message = "Test_send Information";
echo "Message To server :".$message;

// create socket
$socket = socket_create(AF_INET, SOCK_STREAM, 0) or die("Could not create socket\n");
// connect to server
$result = socket_connect($socket, $host, $port) or die("Could not connect to server\n");  
// send string to server
socket_write($socket, $message, strlen($message)) or die("Could not send data to server\n");
// get server response
$result = socket_read ($socket, 1024) or die("Could not read server response\n");
echo "Reply From Server  :".$result;
// close socket
socket_close($socket);
?>