wp-includes/embed.php:325Registers the oEmbed REST API route.
function wp_oembed_register_route() { $controller = new WP_oEmbed_Controller(); $controller->register_routes();}Introduced in 4.4.0. Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-includes/embed.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.