範例

範例 #1 通訊端範例：簡單的 TCP/IP 伺服器

此範例顯示一個簡單的交談伺服器。請根據您的設定更改 address 和 port 變數並執行。然後，您可以使用類似以下的命令連線到伺服器：telnet 192.168.1.53 10000（其中地址和連接埠與您的設定相符）。您輸入的任何內容都將輸出到伺服器端，並回顯給您。要斷開連線，請輸入「quit」。

#!/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);
?>

範例 #2 通訊端範例：簡單的 TCP/IP 用戶端

此範例顯示一個簡單的、一次性的 HTTP 用戶端。它只是連線到一個頁面，提交一個 HEAD 請求，回顯回覆，然後退出。

<?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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使用者貢獻的筆記 3 則筆記

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javier,javiern at gmail dot com ¶

12 年前

您可以輕鬆擴展第一個範例來處理任意數量的連線，而不僅僅是一個

#!/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);
?>

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Timofey Bugaevsky ¶

1 年前

Javier 的好例子。

要在 Docker 容器中使用，您可以使用 0 作為地址
$address = '0';

要將訊息廣播給所有客戶端，您可以對所有需要的客戶端使用 socket_write()
...
// 處理輸入
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;
            }
            ...
        }
    }
...

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-2

zital at riseup dot net ¶

7 年前

由於 PHP 標準，將程式碼修改為
<?php
//...
 $write = NULL;
 $except = NULL;
 $tv_sec = 5;

 // 設定 socket_select 的阻塞呼叫
 if(socket_select($read, $write, $except, $tv_sec) < 1)
//...
?>

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