socket_write

(PHP 4 >= 4.1.0, PHP 5, PHP 7)

socket_writeBir sokete yazar

Açıklama

socket_write ( resource $soket , string $tampon [, int $uzunluk = 0 ] ) : int

Belirtilen tampon'u belirtilen soket'e yazar.

Değiştirgeler

soket

Tamponun yazılacağı soket.

tampon

Sokete yazılacak veri.

uzunluk

Belirtilmesi isteğe bağlı olup, sokete yazılacak bayt sayısını belirler. Tampon uzunluğundan büyükse tampon uzunluğundan fazlası yok sayılır.

Dönen Değerler

Bir hata oluşmuşsa FALSE yoksa sokete başarıyla yazılan bayt sayısı döner. Hata kodu socket_last_error() işleviyle alınabilir. Bu kod socket_strerror() işlevine aktarılarak hata açıklaması alınablir.

Bilginize:

Hiçbir baytın yazılmadığı anlamına gelen 0 dönüş değeri oldukça geçerli bir dönüş değeridir. Bu bakımdan FALSE değerini sınamak için === işlecini kullanmalısınız.

Notlar

Bilginize:

socket_write() işlevinin tampondaki tüm baytları yazması gerekli değildir. Ağ üzerindeki tamponlara ve benzerlerine bağlı olarak verinin belli bir miktarı hatta tampon çok daha büyük olsa bile sadece bir bayt yazılması bile başarılı bir işlem kabul edilir. Bu bakımdan yazılan bayt sayısını denetleyerek verinin kalanını aktarmayı unutmayın.

Ayrıca Bakınız

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User Contributed Notes 7 notes

up
8
revelable at hotmail dot com
9 years ago
Here we have the same function to write a socket but with improved performance.

If the messager are not larger, they will be written entirely with a single socket_write() call. And is not needed to call the substr() function for the first bucle.

<?php
$st
="Message to sent";
$length = strlen($st);
       
    while (
true) {
       
       
$sent = socket_write($socket, $st, $length);
           
        if (
$sent === false) {
       
            break;
        }
           
       
// Check if the entire message has been sented
       
if ($sent < $length) {
               
           
// If not sent the entire message.
            // Get the part of the message that has not yet been sented as message
           
$st = substr($st, $sent);
               
           
// Get the length of the not sented part
           
$length -= $sent;

        } else {
           
            break;
        }
           
    }
?>
up
1
php at deguest dot asia
5 years ago
I often read in php docs users not checking for the php function returned value, and in the case of socket_write, I could not see here in the comment anyone botering to read on the socket the server reply.
Then one user thought it would be a good idea to use usleep after a socket_write on a smtp connection.
Actually, if you check the server reply, not only will it give time for the server to reply before you write again on the socket, but also this is a great opportunity to check what the server replied you.
For instance, for smtp connection :
In this example MAIL_SERVER, MAIL_PORT and DEBUG are constants I defined.
<?php
function sendmail( $param )
{
   
$from    = &$param[ 'from' ];
   
$to      = &$param[ 'to' ];
   
$message = &$param[ 'data' ];
   
   
$isError = function( $string )
    {
        if(
preg_match( '/^((\d)(\d{2}))/', $string, $matches ) )
        {
            if(
$matches[ 2 ] == 4 || $matches[ 2 ] == 5 ) return( $matches[ 1 ] );
        }
        else
        {
            return(
false );
        }
    };
   
    try
    {
       
$socket = null;
        if( (
$socket = socket_create( AF_INET, SOCK_STREAM, SOL_TCP ) ) == false )
        {
            throw new
Exception( sprintf( "Unable to create a socket: %s", socket_strerror( socket_last_error() ) ) );
        }
        if( !
socket_connect( $socket, MAIL_SERVER, MAIL_PORT ) )
        {
            throw new
Exception( sprintf( "Unable to connect to server %s: %s", MAIL_SERVER, socket_strerror( socket_last_error() ) ) );
        }
       
$read = socket_read( $socket, 1024 );
        if(
$read == false )
        {
            throw new
Exception( sprintf( "Unable to read from socket: %s", socket_strerror( socket_last_error() ) ) );
        }
       
        if(
socket_write( $socket, sprintf( "HELO %s\r\n", gethostname() ) ) === false )
        {
            throw new
Exception( sprintf( "Unable to write to socket: %s", socket_strerror( socket_last_error() ) ) );
        }
       
$read = socket_read( $socket, 1024 );
        if(
$read == false )
        {
            throw new
Exception( sprintf( "Unable to read from socket: %s", socket_strerror( socket_last_error() ) ) );
        }
        else
        {
            if( (
$errCode = $isError( $read ) ) ) throw new Exception( "Server responded with an error code $errCode" );
        }
       
        if(
socket_write( $socket, sprintf( "MAIL FROM: %s\r\n", $from ) ) === false )
        {
            throw new
Exception( sprintf( "Unable to write to socket: %s", socket_strerror( socket_last_error() ) ) );
        }
       
$read = socket_read( $socket, 1024 );
        if(
$read == false )
        {
            throw new
Exception( sprintf( "Unable to read from socket: %s", socket_strerror( socket_last_error() ) ) );
        }
        else
        {
            if( (
$errCode = $isError( $read ) ) ) throw new Exception( "Server responded with an error code $errCode" );
        }
       
/* And some more code, but not enough place in comment */
       
return( $totalWriten );
    }
    catch(
Exception $e )
    {
       
$ERROR = sprintf( "Error sending mail message at line %d. ", $e->getLine() ) . $e->getMessage();
        return(
false );
    }
}
up
1
gtk at linux dot online dot no
17 years ago
from http://www.manualy.sk/sock-faq/unix-socket-faq-2.html
read() is equivalent to recv() with a flags parameter of 0. Other values for the flags parameter change the behaviour of recv(). Similarly, write() is equivalent to send() with flags == 0.
up
-1
webmaster at you-are-infected dot com
13 years ago
If you connect to a Server in a way like you do with telnet or some similar protokoll you may have problems with sending data to the server. I found out that at some servers there is a different between:

<?php
   
    socket_write
($my_socket, $line, strlen ($line));
   
socket_write ($my_socket, "\r\n", strlen ("\r\n"));
   
?>
witch worked at least, and
<?php
    socket_write
($my_socket, $line."\r\n", strlen ($line."\r\n"));
?>
wich made the server stop sending any data.

I hope this helps to save a lot of time. I needed about two days to find out, that this was the problem ;)
up
-6
jean at briskula dot si
9 years ago
Some clients (Flash's XMLSocket for example) won't fire a read event until a new line is recieved.

<?php
   
/*
     * Write to a socket
     * add a newline and null character at the end
     * some clients don't read until new line is recieved
     *
     * try to send the rest of the data if it gets truncated
     */
   
function write(&$sock,$msg) {
       
$msg = "$msg\n\0";
       
$length = strlen($msg);
        while(
true) {
           
$sent = socket_write($sock,$msg,$length);
            if(
$sent === false) {
                return
false;
            }
            if(
$sent < $length) {
               
$msg = substr($msg, $sent);
               
$length -= $sent;
                print(
"Message truncated: Resending: $msg");
            } else {
                return
true;
            }
        }
        return
false;
    }
?>
up
-7
masterwaster at gmail dot com
11 years ago
Hi,
if you got same problems like i have

<?php
@socket_write($xd, "Good Bye!\n\r");
@
socket_shutdown($xd, 2);
@
socket_close($xd);
?>

wont'tx send "Good Bye!\n\r" to the opened socket.

but if you put a
usleep or something like echo "";
between write and shutdown its working.
up
-7
divinity76 at gmail dot com
5 years ago
function AddTCPChecksum(&$data){
//feel free to add some error handling for strlen($data)>65535...
$data=pack("v",strlen($data)).$data;
}
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