CascadiaPHP 2024

例1 ソケットの例: 簡易 TCP/IP サーバー

この例は、簡単な応答サーバーです。変数 addressport を設定と実行環境に合うように変更してください。 このサーバーに次のようなコマンドで接続することが可能です。 : telnet 192.168.1.53 10000 (ただし、 アドレスとポートは設定に合わせます)入力したものは、サーバー側の出力となり、 エコーバックされます。接続を閉じるには、'quit' を入力します。

#!/usr/local/bin/php -q
<?php
error_reporting
(E_ALL);

/* Allow the script to hang around waiting for connections. */
set_time_limit(0);

/* Turn on implicit output flushing so we see what we're getting
* as it comes in. */
ob_implicit_flush();

$address = '192.168.1.53';
$port = 10000;

if ((
$sock = socket_create(AF_INET, SOCK_STREAM, SOL_TCP)) === false) {
echo
"socket_create() failed: reason: " . socket_strerror(socket_last_error()) . "\n";
}

if (
socket_bind($sock, $address, $port) === false) {
echo
"socket_bind() failed: reason: " . socket_strerror(socket_last_error($sock)) . "\n";
}

if (
socket_listen($sock, 5) === false) {
echo
"socket_listen() failed: reason: " . socket_strerror(socket_last_error($sock)) . "\n";
}

do {
if ((
$msgsock = socket_accept($sock)) === false) {
echo
"socket_accept() failed: reason: " . socket_strerror(socket_last_error($sock)) . "\n";
break;
}
/* Send instructions. */
$msg = "\nWelcome to the PHP Test Server. \n" .
"To quit, type 'quit'. To shut down the server type 'shutdown'.\n";
socket_write($msgsock, $msg, strlen($msg));

do {
if (
false === ($buf = socket_read($msgsock, 2048, PHP_NORMAL_READ))) {
echo
"socket_read() failed: reason: " . socket_strerror(socket_last_error($msgsock)) . "\n";
break
2;
}
if (!
$buf = trim($buf)) {
continue;
}
if (
$buf == 'quit') {
break;
}
if (
$buf == 'shutdown') {
socket_close($msgsock);
break
2;
}
$talkback = "PHP: You said '$buf'.\n";
socket_write($msgsock, $talkback, strlen($talkback));
echo
"$buf\n";
} while (
true);
socket_close($msgsock);
} while (
true);

socket_close($sock);
?>

例2 ソケットの例: 簡易 TCP/IP クライアント

この例は、簡単な一回限りの HTTP クライアントです。ここでは、 あるページに接続して HEAD リクエストを送信し、応答を出力た後で終了します。

<?php
error_reporting
(E_ALL);

echo
"<h2>TCP/IP Connection</h2>\n";

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

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

/* 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";
?>

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User Contributed Notes 3 notes

up
82
javier,javiern at gmail dot com
11 years ago
You can easily extend the first example to handle any number of connections instead of jsut one

#!/usr/bin/env php
<?php
error_reporting
(E_ALL);

/* Permitir al script esperar para conexiones. */
set_time_limit(0);

/* Activar el volcado de salida implícito, así veremos lo que estamo obteniendo
* mientras llega. */
ob_implicit_flush();

$address = '127.0.0.1';
$port = 10000;

if ((
$sock = socket_create(AF_INET, SOCK_STREAM, SOL_TCP)) === false) {
echo
"socket_create() falló: razón: " . socket_strerror(socket_last_error()) . "\n";
}

if (
socket_bind($sock, $address, $port) === false) {
echo
"socket_bind() falló: razón: " . socket_strerror(socket_last_error($sock)) . "\n";
}

if (
socket_listen($sock, 5) === false) {
echo
"socket_listen() falló: razón: " . socket_strerror(socket_last_error($sock)) . "\n";
}

//clients array
$clients = array();

do {
$read = array();
$read[] = $sock;

$read = array_merge($read,$clients);

// Set up a blocking call to socket_select
if(socket_select($read,$write = NULL, $except = NULL, $tv_sec = 5) < 1)
{
// SocketServer::debug("Problem blocking socket_select?");
continue;
}

// Handle new Connections
if (in_array($sock, $read)) {

if ((
$msgsock = socket_accept($sock)) === false) {
echo
"socket_accept() falló: razón: " . socket_strerror(socket_last_error($sock)) . "\n";
break;
}
$clients[] = $msgsock;
$key = array_keys($clients, $msgsock);
/* Enviar instrucciones. */
$msg = "\nBienvenido al Servidor De Prueba de PHP. \n" .
"Usted es el cliente numero: {$key[0]}\n" .
"Para salir, escriba 'quit'. Para cerrar el servidor escriba 'shutdown'.\n";
socket_write($msgsock, $msg, strlen($msg));

}

// Handle Input
foreach ($clients as $key => $client) { // for each client
if (in_array($client, $read)) {
if (
false === ($buf = socket_read($client, 2048, PHP_NORMAL_READ))) {
echo
"socket_read() falló: razón: " . socket_strerror(socket_last_error($client)) . "\n";
break
2;
}
if (!
$buf = trim($buf)) {
continue;
}
if (
$buf == 'quit') {
unset(
$clients[$key]);
socket_close($client);
break;
}
if (
$buf == 'shutdown') {
socket_close($client);
break
2;
}
$talkback = "Cliente {$key}: Usted dijo '$buf'.\n";
socket_write($client, $talkback, strlen($talkback));
echo
"$buf\n";
}

}
} while (
true);

socket_close($sock);
?>
up
1
Timofey Bugaevsky
1 year ago
Good example from Javier.

For using in docker container you can use 0 as an address:
$address = '0';

To broadcast a message to all clients, you can use socket_write() for all required clients:
...
// Handle Input
foreach ($clients as $key => $client) {
if (in_array($client, $read)) {
...
if ($buf == 'message') {
$talkback = "$buf $key\n";
foreach ($clients as $curClient) {
socket_write($curClient, $talkback, strlen($talkback));
}
continue;
}
...
}
}
...
up
-2
zital at riseup dot net
7 years ago
due to PHP standars modify the code to:
<?php
//...
$write = NULL;
$except = NULL;
$tv_sec = 5;

// Set up a blocking call to socket_select
if(socket_select($read, $write, $except, $tv_sec) < 1)
//...
?>
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