<?php
	
	error_reporting(E_ALL);
	
	set_time_limit(0);
	
	header("Content-Type: text/plain; charset=UTF-8");
	
	define("HOST", "127.0.0.1");
	
	define("PORT", 28028);
	
	$socket = socket_create(AF_INET, SOCK_STREAM, 0) or die("Could not create socket\n");
	
	$result = socket_bind($socket, HOST, PORT) or die("Could not bind to socket\n");
	
	$result = socket_listen($socket, 3) or die("Could not set up socket listener\n");
	
	$spawn = socket_accept($socket) or die("Could not accept incoming connection\n");
	
	$input = socket_read($spawn, 1024) or die("Could not read input\n");
	
	$input = trim($input);
	
	echo "Client Message: {$input}";
	
	$output = strrev($input) . "\n";
	
	socket_write($spawn, $output, strlen($output)) or die("Could not write output\n");
	
	socket_close($spawn);
	
	socket_close($socket);

<?php
	
	error_reporting(E_ALL);
	
	set_time_limit(0);
	
	header("Content-Type: text/plain; charset=UTF-8");
	
	define("HOST", "127.0.0.1");
	
	define("PORT", 28028);
	
	$message = "Hello";
	
	echo "Message To Server: {$message}\n";
	
	$socket = socket_create(AF_INET, SOCK_STREAM, 0) or die("Could not create socket\n");
	
	$result = socket_connect($socket, HOST, PORT) or die("Could not connect to server\n");  
	
	socket_write($socket, $message, strlen($message)) or die("Could not send data to server\n");
	
	$result = socket_read($socket, 1024) or die("Could not read server response\n");
	
	echo "Reply From Server: {$result}\n";
	
	socket_close($socket);