Help sending commands to rs232/Comm1

I am trying to talk to a motor connected to comm1 of my computer. I want to send it the command "MA 25600". It is connected to Comm1. I am using fsockopen and fwrite. The code is as follows.

<?php
$a="";
$b="";
$c="localhost";

if (!$fp=fsockopen($c,1, $a, $b , 15))
{
echo 'this did not work';
}

$out = "MA 256000";

if(fwrite($fp, $out))
{
echo 'this worked';
}
?>

Please help to fix this.

 

I also tried this

<?php
$a="";
$b="";
$c="localhost";

if (!$fp=fopen("COM1:", "w"))
{
echo 'this does not work';
}

$out = "MA 256000";

if(fwrite($fp, $out))
{
echo 'this is working';
}
?>

This gives me the error
Warning: fopen(COM1: failed to open stream: Permission denied in c:\program files\easyphp1-8\www\sim\run.php on line 6
and
Warning: fwrite(): supplied argument is not a valid stream resource in c:\program files\easyphp1-8\www\sim\run.php on line 15

 

I haven't tried direct IO using PHP. But these may be useful
http://in.php.net/manual/en/function.fopen.php#20935
http://www.codecomments.com/archive228-2005-3-412694.html

http://www.phpcs.com/code.aspx?ID=36224
http://www.weberdev.com/get_example-4347.html

Thomas