Exemple

Example #1 Socket example: Simple TCP/IP server

This example shows a simple talkback server. Change the address and port variables to suit your setup and execute. You may then connect to the server with a command similar to: telnet 192.168.1.53 10000 (where the address and port match your setup). Anything you type will then be output on the server side, and echoed back to you. To disconnect, enter '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_INETSOCK_STREAMSOL_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($sock5) === false) {
    echo 
"socket_listen() failed: reason: " socket_strerror(socket_last_error($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($msgsock$msgstrlen($msg));

    do {
        if (
false === ($buf socket_read($msgsock2048PHP_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($msgsock$talkbackstrlen($talkback));
        echo 
"$buf\n";
    } while (
true);
    
socket_close($msgsock);
} while (
true);

socket_close($sock);
?>

Example #2 Socket example: Simple TCP/IP client

This example shows a simple, one-shot HTTP client. It simply connects to a page, submits a HEAD request, echoes the reply, and exits.

<?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_INETSOCK_STREAMSOL_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($socket$instrlen($in));
echo 
"OK.\n";

echo 
"Reading response:\n\n";
while (
$out socket_read($socket2048)) {
    echo 
$out;
}

echo 
"Closing socket...";
socket_close($socket);
echo 
"OK.\n\n";
?>

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User Contributed Notes 3 notes

up
5
javier,javiern at gmail dot com
1 year 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
-12
Anonymous
7 months ago
The variable $in in TCP client exampe really needs to end with '\n' or otherwise it doesn't fire the read event in the server side (at least in my Delphi program).
up
-20
silverwatersask at hotmail dot com
11 months ago
Wonder if someone could translate this to English.
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