the_post_thumbnail_url( string|int[] $size = 'post-thumbnail' )

Display the post thumbnail URL.

Parameters

$size

(string|int[]) (Optional) Image size to use. Accepts any valid image size, or an array of width and height values in pixels (in that order).

Default value: 'post-thumbnail'

Source

File: 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 );
	}
}

Uses

Uses Description
wp-includes/post-thumbnail-template.php: get_the_post_thumbnail_url()

Return the post thumbnail URL.
wp-includes/formatting.php: esc_url()

Checks and cleans a URL.

Changelog

Version Description
4.4.0 Introduced.

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Licensed under the GNU GPLv2+ License.
https://developer.wordpress.org/reference/functions/the_post_thumbnail_url