I think you want it this way:

<?php if( $disp != 'single') {
    if (!( $blog == 10 OR $blog == 17 OR $blog == 18)) echo  "To print follow this Link..";
} ?> 

Just reread your post. You're having a problem with the first condition? Try putting in echo $disp; to make sure you're getting that variable correctly.

Thanks personman,

Your way works just the way I wanted.

Aprreciate vey much your help. :lol: