The function dio_tcsetattr()
sets the terminal attributes and baud rate of the open resource. The currently
available options are
'baud' - baud rate of the port - can be
38400,19200,9600,4800,2400,1800,1200,600,300,200,150,134,110,75
or 50, default value is 9600
'bits' - data bits - can be 8,7,6 or 5 default value
is 8
'stop' - stop bits - can be 1 or 2 default value is
1
'parity' - can be 0,1 or 2 default value is 0
注: This function was introduced in PHP 4.3.0.