wp-content/themes/twentyseventeen/functions.php:423Adds a pingback url auto-discovery header for singularly identifiable articles.
function twentyseventeen_pingback_header() { if ( is_singular() && pings_open() ) { printf( '<link rel="pingback" href="%s">' . "\n", esc_url( get_bloginfo( 'pingback_url' ) ) ); }}Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-content/themes/twentyseventeen/functions.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.