wp-content/themes/twentyfourteen/inc/custom-header.php:163Create the custom header image markup displayed.
function twentyfourteen_header_image() { $custom_header = get_custom_header(); $attrs = array( 'alt' => get_bloginfo( 'name', 'display' ), 'height' => $custom_header->height, 'width' => $custom_header->width, ); if ( function_exists( 'the_header_image_tag' ) ) { the_header_image_tag( $attrs ); return; } ?> <img src="<?php header_image(); ?>" width="<?php echo esc_attr( $attrs['width'] ); ?>" height="<?php echo esc_attr( $attrs['height'] ); ?>" alt="<?php echo esc_attr( $attrs['alt'] ); ?>" /> <?php }Introduced in Twenty Fourteen 3.8. Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-content/themes/twentyfourteen/inc/custom-header.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.