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socket_set_block> <socket_send
[edit] Last updated: Sat, 12 May 2012

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(PHP 4 >= 4.1.0, PHP 5)

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


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

The function socket_sendto() sends len bytes from buf through the socket socket to the port at the address addr.



A valid socket resource created using socket_create().


The sent data will be taken from buffer buf.


len bytes from buf will be sent.


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.


IP address of the remote host.


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.


Example #1 socket_sendto() Example


$msg "Ping !";
$len strlen($msg);


See Also

add a note add a note User Contributed Notes socket_sendto
ole_DOT_omland_AT_gmail_DOT_com 12-Oct-2005 07:44
Here's how you can make an udp broadcast, useful sometimes, and does seem hard to figure out hwo to do..

= 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, '', $port);

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