(PHP 5, PHP 7)
stream_socket_sendto — Sends a message to a socket, whether it is connected or not
stream_socket_sendto ( resource $socket , string $data [, int $flags = 0 [, string $address ]] ) : int
Sends the specified data through the socket.
socket
The socket to send data to.
data
The data to be sent.
flags
The value of flags can be any combination of the following:
STREAM_OOB | Process OOB (out-of-band) data. |
address
The address specified when the socket stream was created will be used unless an alternate address is specified in address.
If specified, it must be in dotted quad (or [ipv6]) format.
Returns a result code, as an integer.
Example #1 stream_socket_sendto() Example
<?php
/* Open a socket to port 1234 on localhost */
$socket = stream_socket_client('tcp://127.0.0.1:1234');
/* Send ordinary data via ordinary channels. */
fwrite($socket, "Normal data transmit.");
/* Send more data out of band. */
stream_socket_sendto($socket, "Out of Band data.", STREAM_OOB);
/* Close it up */
fclose($socket);
?>
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https://www.php.net/manual/en/function.stream-socket-sendto.php