How to build an image related post plugin

I plug this into functions.php:

function postimage($size=medium) {
	if ( $images = get_children(array(
		'post_parent' => get_the_ID(),
		'post_type' => 'attachment',
		'numberposts' => 1,
		'post_mime_type' => 'image',)))
	{
		foreach( $images as $image ) {
			$attachmenturl=wp_get_attachment_url($image->ID);
			$attachmentimage=wp_get_attachment_image( $image->ID, $size );
			$imagelink=get_permalink($image->post_parent);

			echo '<a href="'.$imagelink.'">'.$attachmentimage.apply_filters('the_title', $parent->post_title).'</a>';
		}
	}
}

Then, I query the post thumbnails with this:

<?php postimage(‘thumbnail’); ?>

You can use this for the “medium” size image too:

<?php postimage(‘medium’); ?>

For original/full

<?php postimage(‘large’); ?>

Please explain more.

Here is my blog

http://bbarms.com/blog/speed-loader-airsplat/

As you can see the “Customers Who Viewed This Item Also Viewed”
I used the plugin : http://fairyfish.net/2007/09/12/wordpress-23-related-posts-plugin/

What i need is Post Pictures in front of Similar Post Titles

Example
Customers Who Viewed This Item Also Viewed
(POST PIC) — ( SIMILAR POST TITLE)

it look like this
http://bbarms.com/blog/airsoft-mkii-m249-saw-machine-gun-ak/

that My Single Post code

<?php get_header(); ?>

<div id="content"><div id="content-inner">

	<?php get_sidebar(); ?>

	<div id="maincol">

		<div class="col-inner"> 

		  <?php if (have_posts()) : while (have_posts()) : the_post(); ?>

		    <div class="post" id="post-<?php the_ID(); ?>">

			  			  <div class="post-title">

			    <h3><a href="<?php the_permalink() ?>" rel="bookmark" title="Permanent Link to <?php the_title(); ?>"><?php the_title(); ?></a></h3>
			  </div>

			 <div class="entry">

<?php the_content(''.__('Read the rest of this entry <span class="meta-nav">&raquo;</span>', 'sandbox').''); ?>

<?php link_pages("\t\t\t\t\t<div class='page-link'>".__('Pages: ', 'sandbox'), "</div>\n", 'number'); ?>

<?php edit_post_link(__('Edit', ''), "- <span class=\"edit-link\">", "</span>"); ?>

			  </div>		

<?php wp_related_posts(); postimage('thumbnail') ; ?>

		  <?php comments_template(); ?>

			<?php endwhile; else: ?>

				<p>Sorry, no posts matched your criteria.</p>

		<?php endif; ?>

		  </div><!-- .post -->

		</div>

	</div><!-- #maincol -->

</div></div><!-- #content -->

<?php include (TEMPLATEPATH . '/extra.php'); ?>

<?php get_footer(); ?>

here is my function.php

<?php

if ( function_exists('register_sidebar') )

    register_sidebar(array(

		'name' => 'Left Column',    

        'before_widget' => '<li id="%1$s" class="widget %2$s">',

        'after_widget' => '</li>',

        'before_title' => '<h2 class="sidebartitle">',

        'after_title' => '</h2>',

    ));

if ( function_exists('register_sidebar') )

    register_sidebar(array(

		'name' => 'Right Column',    

        'before_widget' => '<li id="%1$s" class="widget %2$s">',

        'after_widget' => '</li>',

        'before_title' => '<h2 class="sidebartitle">',

        'after_title' => '</h2>',

    ));

// Search 	

	function widget_zone_out_search() {

?>	

<?php

}

if ( function_exists('register_sidebar_widget') )

    register_sidebar_widget(__('Search'), 'widget_zone_out_search');

function postimage($size=medium) {
	if ( $images = get_children(array(
		'post_parent' => get_the_ID(),
		'post_type' => 'attachment',
		'numberposts' => 1,
		'post_mime_type' => 'image',)))
	{
		foreach( $images as $image ) {
			$attachmenturl=wp_get_attachment_url($image->ID);
			$attachmentimage=wp_get_attachment_image( $image->ID, $size );
			$imagelink=get_permalink($image->post_parent);

			echo '<a href="'.$imagelink.'">'.$attachmentimage.apply_filters('the_title', $parent->post_title).'</a>';
		}
	}
}

And i also added

$output .= ‘

• ‘;
  to
  $output .= ‘
• ‘.postimage(‘thumbnail’);

  Can u add me harrishcl @ gmail .com / hotmail . com

First, remove postimage from your theme files. No need to put it anywhere in your theme file. So, remove it from single.php .

Did you put change the output thing in the plugin’s wp_related_posts.php and upload it to the plugin directory? Because I can’t see any hints to that in your site.

Okay, sounds like the function does not know what the post-id is.

ANother thing that bothers me is that the images are above the list of related plugins. Something is messed up. try to get rid of the function code inside the plugin, then see if the thumbnails disapear. I’ll get back to you on the ID thing.

Im looking to a plugin like this, i was thinking using “Extractor” plugin plus “related posts” 2.04