wp-includes/class-wp-navigation-fallback.php:270Creates a default Navigation Block Menu fallback.
int|WP_Error private static function create_default_fallback() { $default_blocks = static::get_default_fallback_blocks(); // Create a new navigation menu from the fallback blocks. $default_fallback = wp_insert_post( array( 'post_content' => $default_blocks, 'post_title' => _x( 'Navigation', 'Title of a Navigation menu' ), 'post_name' => 'navigation', 'post_status' => 'publish', 'post_type' => 'wp_navigation', ), true // So that we can check whether the result is an error. ); return $default_fallback; }Introduced in 6.3.0. Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-includes/class-wp-navigation-fallback.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.