_register_remote_theme_patterns() │ WP 6.0.0

Registers patterns from Pattern Directory provided by a theme's theme.json file.

Internal function — this function is designed to be used by the kernel itself. It is not recommended to use this function in your code.

Hooks from the function

Return

null. Nothing (null).

Usage

_register_remote_theme_patterns();

Changelog

Since 6.0.0 Introduced.
Since 6.2.0 Normalized the pattern from the API (snake_case) to the format expected by register_block_pattern()
Since 6.3.0 Add 'pattern-directory/theme' to the pattern's 'source'.

_register_remote_theme_patterns() code WP 6.5.2

wp-includes/block-patterns.php 
function _register_remote_theme_patterns() {
	/** This filter is documented in wp-includes/block-patterns.php */
	if ( ! apply_filters( 'should_load_remote_block_patterns', true ) ) {
		return;
	}

	if ( ! wp_theme_has_theme_json() ) {
		return;
	}

	$pattern_settings = wp_get_theme_directory_pattern_slugs();
	if ( empty( $pattern_settings ) ) {
		return;
	}

	$request         = new WP_REST_Request( 'GET', '/wp/v2/pattern-directory/patterns' );
	$request['slug'] = $pattern_settings;
	$response        = rest_do_request( $request );
	if ( $response->is_error() ) {
		return;
	}
	$patterns          = $response->get_data();
	$patterns_registry = WP_Block_Patterns_Registry::get_instance();
	foreach ( $patterns as $pattern ) {
		$pattern['source']  = 'pattern-directory/theme';
		$normalized_pattern = wp_normalize_remote_block_pattern( $pattern );
		$pattern_name       = sanitize_title( $normalized_pattern['title'] );
		// Some patterns might be already registered as core patterns with the `core` prefix.
		$is_registered = $patterns_registry->is_registered( $pattern_name ) || $patterns_registry->is_registered( "core/$pattern_name" );
		if ( ! $is_registered ) {
			register_block_pattern( $pattern_name, $normalized_pattern );
		}
	}
}