(PECL swoole >= 1.9.0)
Swoole\Client::send — Send data to the remote TCP socket.
$data, string $flag = ?): int
dataThe data to send which can be string or binary
flag
If the client sends data successfully, it returns the length of data sent. Or it returns false and sets $swoole_client->errCode. For sync client, there is no limit for the data to send. For async client, The limit for the data to send is socket_buffer_size.