how to change featured image in wordpress of send url to wordpress code example
Example: get featured image url in wordpress
if ( has_post_thumbnail()) {
$large_image_url = wp_get_attachment_image_src( get_post_thumbnail_id(), 'large');
echo '<a href="' . $large_image_url[0] . '">';
the_post_thumbnail('thumbnail');
echo '</a>';
}