errors in WordPress php
I am trying to display the headlines from each post in a category with the post thumbnails underneath each title. What I am getting right now is the title of the current page repeating where the post titles from the category should be, and no thumbnails.
Code:
<?php
= array( 'category' => 18, 'post_type' => 'post' );
= get_posts( );
foreach ( as ) : setup_postdata();
?>
<h2><a href="<?php the_permalink(); ?>"><?php the_title(); ?></a></h2>
<?php get_the_post_thumbnail(); ?>
<?php echo((); ?>
<?php endforeach; ?>