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    socket_write

    (PHP 4 >= 4.1.0, PHP 5, PHP 7, PHP 8)

    socket_write — Bir sokete yazar

    Açıklama

    socket_write(Socket $soket, string $tampon, ?int $uzunluk = null): int|false

    Belirtilen tampon'u belirtilen soket'e yazar.

    Bağımsız Değişkenler

    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

    Sokete başarıyla yazılan bayt sayısı, başarısızlık durumunda false 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.

    Sürüm Bilgisi

    Sürüm: Açıklama
    8.0.0soket artık bir Socket örneği olabiliyor; evvelce resource türündeydi.
    8.0.0 uzunluk artık null olabiliyor.

    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 8 notes

    up
    9
    revelable at hotmail dot com
    13 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
    9 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
    22 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
    anonymous
    3 years ago
    sending a few mbs or more results in incomplete transfers, send data in a loop and chunks instead, socket_write reports complete write even though it is only a partial transfer, possibly because of buffer overrun somewhere.

    $strlen=strlen($msg);
    $totaltransferred=0;

    $blocksize=10000;
    for ($a=0;$a<$strlen;$a+=$blocksize){
        $part=substr($msg,$a,$blocksize);
        $transferred=socket_write($socket,$part,strlen($part));
        $totaltransferred+=$transferred;
    }
       
    if ($totaltransferred<$strlen){
        echo "incomplete transfer";
    }
    up
    -2
    webmaster at you-are-infected dot com
    18 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
    -5
    jean at briskula dot si
    13 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
    16 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
    9 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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