【PHP】HTTP/1 クライアントで socket_select を使う

<?php

$address = '0.0.0.0';
$port    = 8000;

$sock = socket_create(AF_INET, SOCK_STREAM, 0);
socket_set_option($sock, SOL_SOCKET, SO_REUSEADDR, 1);
socket_set_nonblock($sock);
socket_connect($sock, $address, $port);
socket_write($sock, "GET / HTTP/1.1\r\n\r\n");

$read = [$sock];

while (true) {
    $ready = socket_select($read, $write, $except, 10);

    if ($ready == 0) {
        continue;
    }

    foreach($read as $read_sock) {
        $input = socket_read($read_sock, 1024);

        if (empty($input)) {
            $key = array_search($read_sock, $read);
            unset($read[$key]);
            continue;
        }

        print($input);
    }


    if (!count($read)) {
        break;
    }
}

socket_close($sock);