Wordpress | Toolbox | Thumbnail with Caption

thumbnailcaption.php

<?php
/*
Module Name: Thumbnail with caption
Module URI: http://www.transformationpowertools.com/wordpress/wordpress-post-thumbnails-with-caption
Description: show thumbnail with caption, if available, wrapped with '.wp-caption thumb-caption' div; show just the thumbnail otherwise for featured images in the loop [Frontend]
Author: Michael aka alchymyth
Author URI: http://www.transformationpowertools.com/wordpress/author/alchymyth
*/


/* Sicherheitsabfrage */
if ( !class_exists('Toolbox') ) {
	die();
}

add_filter('post_thumbnail_html','add_post_thumbnail_caption',10,5);

function add_post_thumbnail_caption($html, $post_id, $post_thumbnail_id, $size, $attr) {   
	
if( $html == '' || !in_the_loop() ) { 
	
	return $html;
		
} else {
	
	$out = '';

  $thumbnail_image = get_posts(array('p' => $post_thumbnail_id, 'post_type' => 'attachment'));

  if ($thumbnail_image && isset($thumbnail_image[0])) {
  
  $image = wp_get_attachment_image_src($post_thumbnail_id, $size); 
  $t_width = $image[1] +10; // +10 here for extra padding, needs to be considered in writing css - the default image caption uses +10;
  $class = '';
  if($attr && isset($attr['class'])) $class = $attr['class'];
    if($thumbnail_image[0]->post_excerpt) $out .= '<div class="wp-caption thumb-caption '.$class.'" style="width:'.$t_width.'px; ">';
	
	$out .= $html; 
	
	if($thumbnail_image[0]->post_excerpt) $out .= '<p class="wp-caption-text">'.$thumbnail_image[0]->post_excerpt.'</p></div>'; 
  }
return $out; 
}
/*css classes for this:
.wp-caption.thumb-caption { ... }
.wp-caption.thumb-caption img { ... }
.wp-caption.thumb-caption .wp-caption-text { ... }
*/
}