wp-content/themes/twentythirteen/inc/custom-header.php:221Outputs markup to be displayed on the Appearance > Header admin panel.
function twentythirteen_admin_header_image() { $style = 'color: #' . get_header_textcolor() . ';'; if ( ! display_header_text() ) { $style = 'display: none;'; } ?> <div id="headimg" style="background: url(<?php echo esc_url( get_header_image() ); ?>) no-repeat scroll top; background-size: 1600px auto;"> <div class="home-link"> <h1 class="displaying-header-text"><a id="name" style="<?php echo esc_attr( $style ); ?>" onclick="return false;" href="#" tabindex="-1"><?php bloginfo( 'name' ); ?></a></h1> <h2 id="desc" class="displaying-header-text" style="<?php echo esc_attr( $style ); ?>"><?php bloginfo( 'description' ); ?></h2> </div> </div> <?php}Introduced in Twenty Thirteen 1.0. Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-content/themes/twentythirteen/inc/custom-header.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.