socket_sendto()

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

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

说明

socket_sendto(resource $socket,string $buf,int $len,int $flags,string $addr[,int $port= 0]): int

The function socket_sendto() sends$lenbytes from$bufthrough the socket$socketto the$portat the address$addr.

参数

$socket

A valid socket resource created using socket_create().

$buf

The sent data will be taken from buffer$buf.

$len

$lenbytes from$bufwill be sent.

$flags

The value of$flagscan 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.

$addr

IP address of the remote host.

$port

$portis the remote port number at which the data will be sent.

返回值

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

范例

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);
?>

参见

socket_send()Sends data to a connected socket

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);
?>