#include <arpa/inet.h>
#include <sys/socket.h>
#include <iostream>

using namespace std;

#define MYPORT 3490
#define BACKLOG 10

int main(void){
    int sockfd, new_fd;
    struct sockaddr_in my_addr;
    struct sockaddr_in their_addr;

    socklen_t sin_size;
    sin_size = sizeof(struct sockaddr_in);
    int yes=1;

    if ((sockfd = socket(AF_INET, SOCK_STREAM, 0)) == -1) {
          perror("socket");
          exit(1);
    }

if (setsockopt(sockfd, SOL_SOCKET, SO_REUSEADDR, &yes, sizeof(int)) == -1) {
  perror("setsockopt");
  exit(1);
}

my_addr.sin_family = AF_INET;
my_addr.sin_port = htons(MYPORT);
my_addr.sin_addr.s_addr = INADDR_ANY;
memset(&(my_addr.sin_zero), '\', 8);

if (bind(sockfd, (struct sockaddr *)&my_addr, sizeof(struct sockaddr)) == -1) {
  perror("bind");
  exit(1);
}

if (listen(sockfd, BACKLOG) == -1) {
  perror("listen");
  exit(1);
}

if ((new_fd = accept(sockfd, (struct sockaddr *)&their_addr, &sin_size)) == -1) {
  perror("accept");
  exit(0);
}

cout << "server: got connection from " << inet_ntoa(their_addr.sin_addr) << endl;

if (send(new_fd, "Hello, world!\n", 14, 0) == -1) perror("send");

close(new_fd);
close(sockfd);

return 0;
}

<?php
error_reporting(E_ALL);
echo "<h2>TCP/IP Connection</h2>\n";

/* Get the port for the WWW service. */
$service_port = 3490; //getservbyname('www', 'tcp');

/* Get the IP address for the target host. */
$address = gethostbyname('192.168.0.3');

/* Create a TCP/IP socket. */
$socket = socket_create(AF_INET, SOCK_STREAM, SOL_TCP);
if ($socket === false) {
    echo "socket_create() failed: reason: " . socket_strerror(socket_last_error()) . "\n";
} else {
    echo "OK.\n";
}

echo "Attempting to connect to '$address' on port '$service_port'...";
$result = socket_connect($socket, $address, $service_port);
if ($result === false) {
    echo "socket_connect() failed.\nReason: ($result) " . socket_strerror(socket_last_error($socket)) . "\n";
} else {
    echo "OK.\n";
}

$in = "HEAD / HTTP/1.1\r\n";
$in .= "Host: www.example.com\r\n";
$in .= "Connection: Close\r\n\r\n";
$out = '';

echo "Sending HTTP HEAD request...";
socket_write($socket, $in, strlen($in));
echo "OK.\n";

echo "Reading response:\n\n";
while ($out = socket_read($socket, 2048)) {
    echo $out;
}

echo "Closing socket...";
socket_close($socket);
echo "OK.\n\n";

?>