PHP로 소켓 통신을 시도해 봤습니다.

<?php

$address = '127.0.0.1';
$port = 8000;

$sock = socket_create(AF_INET, SOCK_STREAM, SOL_TCP); //※1
socket_bind($sock, $address, $port); //※2
socket_listen($sock, 5); // ※3

$msgsock = socket_accept($sock); // ※5

do {
    $buf = socket_read($msgsock, 2048, PHP_NORMAL_READ); // ※6
    if (!$buf = trim($buf)) {
        continue;
    }
    $talkback = "PHP: You said '$buf'.\n";
    socket_write($msgsock, $talkback, strlen($talkback)); // ※7
    break;

} while (true);
socket_close($msgsock); // ※8

socket_close($sock); // ※9
?>