# socket_sendto

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

socket_sendto — 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 `len` bytes from `buf` through the socket `socket` to the `port` at 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`

  `len` bytes from `buf` 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.

`addr`

  IP address of the remote host.

`port`

  `port` is 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

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);
    ?>

### 参见

- socket_send() - Sends data to a connected socket