[PHP] dio_read timeout?

[AC]

I'm using dio_read to read data from a serial port via a php cli script, 
this works great.

However I'm unable to get dio_read to timeout if there's no data to 
read. No matter how I formulate the while loop, set_time_out, etc I
can't seem to get it to stop reading and move on.

Anyone have a work around or ideas?
Example snippet, where $fd is a valid file descriptor.
function readData($fd) {
        $startTime=microtime();
        $endTime=$startTime+'.02';
        $data=null;
        $i=0;
        #while($startTime < $endTime){
        while($i < 5) {
                $data.=dio_read($fd);
                if($data) {
                   echo "Here's some data: $data\n";
                   break;
                }
                $i++;
        }
} //end function
--
PHP General Mailing List (http://www.php.net/)
To unsubscribe, visit: http://www.php.net/unsub.php