the post thumbnail code example

Example 1: get term thumbnail

$image_id           = get_term_meta( $term->term_id, 'thumbnail_id', true );
$post_thumbnail_img = wp_get_attachment_image_src( $image_id, 'large' );

echo '<img src="' . $post_thumbnail_img[0] . '" alt="' . $term->name . '" />';

Example 2: wordpress get post thumbnail

<?php 
/* RETURNS a full image resource as: <img class="data..." src="data...">
   ALL parameters are optional. Not needed if you are on WP LOOP
*/
echo get_the_post_thumbnail( $the_query->ID, array( 500, 400) ); 
/* USE get_the_post_thumbnail_url() to get only the image url */
?>

Example 3: post thumbnail

<?php if (has_post_thumbnail( $post->ID ) ): ?>
  <?php $image = wp_get_attachment_image_src( get_post_thumbnail_id( $post->ID ), 'single-post-thumbnail' ); ?>
  <div id="custom-bg" style="background-image: url('<?php echo $image[0]; ?>')">

  </div>
<?php endif; ?>