(PHP 5 >= 5.5.0, PHP 7)
socket_sendmsg — Send a message
socket_sendmsg ( resource $socket , array $message [, int $flags = 0 ] ) : int|false
This function is currently not documented; only its argument list is available.
socket
message
flags
Returns the number of bytes sent, or false on failure.
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https://www.php.net/manual/en/function.socket-sendmsg.php