wordpress: Print featured image title insted of post title

gistfile1.php

/* Add this to functions.php */

<?php
 function pj_featured_img_title() {
    global $post;
    $pj_thumbnail_id = get_post_thumbnail_id($post->ID);
    $pj_thumbnail_image = get_posts(array('p' => $pj_thumbnail_id, 'post_type' => 'attachment', 'post_status' => 'any'));
    if ($pj_thumbnail_image && isset($pj_thumbnail_image[0])) {
      return $pj_thumbnail_image[0]->post_title;
    }
  }
?>

/* Print it in theme */ 

<?php echo pj_featured_img_title(); ?>

/* Print it in title attribute (this example also show how to link featured image to large image) */ 

<?php 
    	             if ( has_post_thumbnail()) {
					   $large_image_url = wp_get_attachment_image_src( get_post_thumbnail_id(), 'large');
					   $img_title = wp_get_attachment_image_src( get_post_thumbnail_id(), 'large');
					   echo '<a href="' . $large_image_url[0] . '" title="' . pj_featured_img_title('echo=0') . '" >';
					   the_post_thumbnail('IMAGE-SIZE');
					   echo '</a>';
					 }
				?>