(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
$socket
, string $data
, int $length
, int $flags
, string $address
, int|null $port = null
) : int|false
The function socket_sendto() sends
length bytes from data
through the socket socket to the
port at the address address.
socketA 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.
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. |
addressIP address of the remote host.
port
port is the remote port number at which the data
will be sent.
socket_sendto() returns the number of bytes sent to the
remote host, or false if an error occurred.
| 版本 | 说明 |
|---|---|
| 8.0.0 |
socket is a Socket instance now;
previously, it was a resource.
|
| 8.0.0 |
port is nullable now.
|
Example #1 socket_sendto() Example
<?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);
?>