示例

示例 #1 Socket 举例：简单的 TCP/IP 服务器

这个例子展示了一个简单的对讲服务器。更改 address 和 port 以满足设置和执行。可以使用类似于这样的命令连接到服务器：telnet 192.168.1.53 10000（address 和 port 匹配刚才的设置）。输入的任何东西都会在服务器端进行输出，并回显。要断开连接，请输入 “quit”。

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

/* 允许脚本等待连接。 */
set_time_limit(0);

/* 打开绝对刷送，这样就可以看到接收了什么。 */
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;
    }
    /* 发送说明。 */
    $msg = "\nWelcome to the PHP Test Server. \n" .
        "To quit, type 'quit'. To shut down the server type 'shutdown'.\n";
    socket_write($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);
?>

示例 #2 Socket 举例：简单的 TCP/IP 客户端

这个例子展示了一个简单的，一次性的 HTTP 客户端。它只是连接到一个页面，提交一个 HEAD 请求，输出回复，然后退出。

<?php
error_reporting(E_ALL);

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

/* 获取 WWW 服务的 port。 */
$service_port = getservbyname('www', 'tcp');

/* 获取目标主机的 IP 地址。 */
$address = gethostbyname('www.example.com');

/* 创建 TCP/IP 套接字。 */
$socket = socket_create(AF_INET, SOCK_STREAM, SOL_TCP);
if ($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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了解如何改进此页面 • 提交拉取请求 • 报告一个错误

＋添加备注

用户贡献的备注 3 notes

down

javier,javiern at gmail dot com ¶

12 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);
?>

down

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;
            }
            ...
        }
    }
...

down

-3

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)
//...
?>