[PHP] Com

[Vora Vor]

"Fatal error: Cannot instantiate non-existent class: com in 
/var/www/html/version2/file.php on line 8"
is the result of running the following code:

<?
$word=new COM("word.application") or die("Cannot start word"); 
print "Loaded word version ($word->Version)\n"; 
$word-visible =1 ; 
?>

Why?