socket_write
(PHP 4 >= 4.1.0, PHP 5, PHP 7, PHP 8)
socket_write — Write to a socket
Parameters
socket-
data-
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 than data's length,
it is silently truncated to the length of data.
Return Values
Returns the number of bytes successfully written to the socket or false on failure.
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.
Notes
Note:
socket_write() does not necessarily write all bytes
from data. It's valid that, depending on the network
buffers etc., only a certain amount of data, even one byte, is written
despite data being longer.
A loop must be used to ensure that the rest of data
is transmitted.
socket_strerror
Socket Functions