Functions.php

add_theme_support( 'post-formats', array( 'aside', 'chat', 'gallery', 'image', 'link', 'quote', 'status', 'video', 'audio' ) ); 

Template file

<div id="post" >
<?php       

             if ( has_post_format( 'aside' )) { 

                 echo the_content(); 

             } 

             elseif ( has_post_format( 'chat' )) { 

                 echo '<h3>'; 

                 echo the_title(); 

                 echo '</h3>'; 

                 echo the_content(); 

            } 

             elseif ( has_post_format( 'gallery' )) { 

                 echo '<h3>'; 

                 echo the_title(); 

                 echo '</h3>'; 

                 echo the_content(); 

             } 

             elseif ( has_post_format( 'image' )) { 

                 echo '<h3>'; 

                 echo the_title(); 

                 echo '</h3>'; 

                 echo the_post_thumbnail('medium'); 

                 echo the_content(); 

             } 

             elseif ( has_post_format( 'link' )) { 

                 echo '<h3>'; 

                 echo the_title(); 

                 echo '</h3>'; 

                 echo the_content(); 

             } 

             elseif ( has_post_format( 'quote' )) { 

                 echo the_content(); 

             } 

             elseif ( has_post_format( 'status' )) { 

                 echo the_content(); 

             } 

             elseif ( has_post_format( 'video' )) { 

                 echo '<h3>'; 

                 echo the_title(); 

                 echo '</h3>'; 

                 echo the_content(); 

             } 

             elseif ( has_post_format( 'audio' )) { 

                 echo '<h3>'; 

                 echo the_title(); 

                 echo '</h3>'; 

                 echo the_content(); 

             } 

             else { 

                 echo '<h3>'; 

                 echo the_title(); 

                 echo '</h3>'; 

                 echo the_content(); 

             } 

         ?> 

     </div> 

<?php endwhile; else: endif; ?> 

</div>

Usage:

• aside – Usually styled without a title. Similar to a Facebook note update.
• chat – A chat transcript
• gallery – A gallery of images.
• link – A link to another site. The first <a href=””> tag in the post content will be considered the external link for that post. Alternatively, if the post consists only of a URL, that will be the URL and the title (post_title) will be the name.
• image – A single image. The first <img /> tag in the post will be the image. Alternatively, if the post consists only of a URL, that will be the image URL and the title of the post (post_title) will be the title attribute for the image.
• quote – A quotation. Probably will contain a blockquote holding the quote content. Alternatively, the quote may be just the content, with the source/author being the title.
• status – A short status update, usually limited to 140 characters. Similar to a Twitter status update.
• video – A single video. The first <video /> tag or object/embed in the post content will be considered the video. Alternatively, if the post consists only of a URL, that will be the video URL.
• audio – An audio file. Could be used for Podcasting

CSS

• aside – class=”format-aside”
• image – class=”format-image”
• chat – class=”format-chat”
• gallery – class=”format-gallery”
• link – class=”format-link”
• quote – class=”format-quote”
• status – class=”format-status”
• video – class=”format-video”
• audio – class=”format-audio”