I need help with this. Please

I need help with this even if only to point me in a direction of something remotely close.
I am using the pay to blog plugin an I need to put this code in the theme of the main blog

<?php 

			$blog_expire = get_option('blog_expire');

			if ( empty( $blog_expire ) || $blog_expire == '0' ) {

				$now = time();

				$now = $now - 30;

				$blog_expire = $demo_period_days = get_site_option( "demo_period_days" );

				$blog_expire = $blog_expire * 86400;

				$blog_expire = $now + $blog_expire;

				update_option('blog_expire', $blog_expire);

			}

			if ( time() > $blog_expire ) {

				echo "yes";

                                  } else {
                                echo "no";
			}

?>

so i need it to get the expired blog by the current users blogId. I already know how to get the blog id of the current user, but I dont know how to write the code.
Example: $blog_expire = get_option(‘blog_expire->$user_blog->userblog_id’);or $blog_expire = get_option(‘blog_expire’) == $user_blog->userblog_id;`

I hope that made sense.
any help would be welcomed even a link to something you think might help.