WordPress at a glance
function is not described

the_header_image_tag() WP 4.4.0

Display the image markup for a custom header image.

No Hooks.

Return

Nothing (null).

Usage

the_header_image_tag( $attr );
$attr(array)
Attributes for the image markup.
Default: ''

Code of the header image tag: wp-includes/theme.php VER 5.1.1

<?php
function the_header_image_tag( $attr = array() ) {
	echo get_header_image_tag( $attr );
}