Related Posts without plugin !!

Hi,

For all users of the theme, if you want to “Related Posts” without plugin.
In functions.php (child theme) put this

add_theme_support( 'post-thumbnails' );
set_post_thumbnail_size( 100, 50, true );

In single.php (child theme) put this, to line 119 in the code
<- / single-Navigation ->

<div class="relatedposts">
                                   <h3>RElated Posts</h3>
                          <?php
	                        $orig_post = $post;
	                        global $post;
	                        $tags = wp_get_post_tags($post->ID);

	                        if ($tags) {
	                        $tag_ids = array();
	                        foreach($tags as $individual_tag) $tag_ids[] = $individual_tag->term_id;
	                        $args=array(
	                        'tag__in' => $tag_ids,
	                        'post__not_in' => array($post->ID),
	                        'posts_per_page'=>4, // Number of related posts to display.
	                        'caller_get_posts'=>1
	                        );

	                        $my_query = new wp_query( $args );

	                        while( $my_query->have_posts() ) {
	                        $my_query->the_post();
	                    ?>

	                           <div class="relatedthumb">
		                       <a rel="external" href="<? the_permalink()?>"><?php the_post_thumbnail(array(150,100)); ?><br />
		                       <?php the_title(); ?>
		                       </a>
	                           </div>

	                             <? }
	                               }
	                         $post = $orig_post;
	                         wp_reset_query();
	                              ?>
                                  </div>
                         <div class="clear"></div>

and finally in style.css (child theme) put this

.relatedposts {width: 760px; margin: 0 0 20px 0; float: left; font-size: 12px;border-bottom: 1px solid #E4E4E4;}
.relatedposts h3 {font-size: 20px; margin: 0 0 5px 0; }
.relatedthumb {margin: 0 1px 0 1px; float: left; }
.relatedthumb img {margin: 0 0 3px 0; padding: 0;}
.relatedthumb a {color :#333; text-decoration: none; display:block; padding: 10px; width: 150px;}
.relatedthumb a:hover {background-color: #ddd; color: #000;}

screenshot
https://img809.imageshack.us/img809/9522/47vt.jpg