Sockets
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 ;)
socket_write
(PHP 4 >= 4.0.7, PHP 5)
socket_write — Write to a socket
Popis
int socket_write
( resource $socket
, string $buffer
[, int $length
] )
The function socket_write() writes to the socket from the given buffer .
Parametre
- socket
-
- buffer
-
The buffer to be written.
- length
-
The optional parameter length can specify an alternate length of bytes written to the socket. If this length is greater then the buffer length, it is silently truncated to the length of the buffer.
Vrátené hodnoty
Returns the number of bytes successfully written to the socket or FALSE one error. The error code can be retrieved with socket_last_error(). This code may be passed to socket_strerror() to get a textual explanation of the error.
Note: It is perfectly valid for socket_write() to return zero which means no bytes have been written. Be sure to use the === operator to check for FALSE in case of an error.
Poznámky
Note: socket_write() does not necessarily write all bytes from the given buffer. It's valid that, depending on the network buffers etc., only a certain amount of data, even one byte, is written though your buffer is greater. You have to watch out so you don't unintentionally forget to transmit the rest of your data.
add a note
User Contributed Notessocket_write
webmaster at you-are-infected dot com
23-Aug-2006 10:27
23-Aug-2006 10:27
gtk at linux dot online dot no
20-Aug-2002 04:43
20-Aug-2002 04:43
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.