PHP: socket_sendto - Manual

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

socket_sendto — Sends a message to a socket, whether it is connected or not

Description

Parameters

socket

A Socket instance created using socket_create().

data

The sent data will be taken from buffer data.

length

length bytes from data will be sent.

flags

The value of flags can be any combination of the following flags, joined with the binary OR (|) operator.

Possible values for flags

MSG_OOB	Send OOB (out-of-band) data.
MSG_EOR	Indicate a record mark. The sent data completes the record.
MSG_EOF	Close the sender side of the socket and include an appropriate notification of this at the end of the sent data. The sent data completes the transaction.
MSG_DONTROUTE	Bypass routing, use direct interface.

address

IP address of the remote host.

port

port is the remote port number at which the data will be sent.

Return Values

socket_sendto() returns the number of bytes sent to the remote host, or false if an error occurred.

Changelog

Examples

<?php
    $sock = socket_create(AF_INET, SOCK_DGRAM, SOL_UDP);

    $msg = "Ping !";
    $len = strlen($msg);

    socket_sendto($sock, $msg, $len, 0, '127.0.0.1', 1223);
    socket_close($sock);
?>

Here's how you can make an udp broadcast, useful sometimes, and does seem hard to figure out hwo to do..

<?php
$sock = socket_create(AF_INET, SOCK_DGRAM, SOL_UDP);
socket_set_option($sock, SOL_SOCKET, SO_BROADCAST, 1);
socket_sendto($sock, $broadcast_string, strlen($broadcast_string), 0, '255.255.255.255', $port);
?>