getattachment

<div style="clear:both">

                        </div>

                        <div class="entry_blog" itemprop="articleBody">

                        <?php if ( has_post_thumbnail() ) {the_post_thumbnail( 'large', array('class'=>'post_thumbnail_common', 'alt' => get_the_title() , 'title' => get_the_title(), 'itemprop'=>'image' ));} ?>

                       <?php wp_get_attachment_image( $post_thumbnail_id, $size, false, $attr ); ?>

                        <?php the_content(); ?> <br>