the_post_thumbnail_url() │ WP 4.4.0

Display the post thumbnail URL.

Uses: get_the_post_thumbnail_url()
1 time — 0.002188 sec (very slow) | 50000 times — 17.96 sec (slow) | PHP 7.0.5, WP 4.4.2

No Hooks.

Return

null. Nothing.

Usage

the_post_thumbnail_url( $size );
$size(string|int[])
Image size to use. Accepts any valid image size, or an array of width and height values in pixels (in that order).
Default: 'post-thumbnail'

Changelog

Since 4.4.0 Introduced.

Code of the_post_thumbnail_url() WP 6.0

wp-includes/post-thumbnail-template.php 
function the_post_thumbnail_url( $size = 'post-thumbnail' ) {
	$url = get_the_post_thumbnail_url( null, $size );

	if ( $url ) {
		echo esc_url( $url );
	}
}

post_thumbnail image

Thumbnail (images)

Link (URL)

Thumbnails