|
The function socket_write()
writes to the socket socket
from buffer.
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.
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.
注: 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.
注: 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.
See also socket_accept(),
socket_bind(),
socket_connect(),
socket_listen(),
socket_read() and
socket_strerror().