WP_Block_Type_Registry

15#[AllowDynamicProperties]16final class WP_Block_Type_Registry {17	/**18	 * Registered block types, as `$name => $instance` pairs.19	 *20	 * @since 5.0.021	 * @var WP_Block_Type[]22	 */23	private $registered_block_types = array();24 25	/**26	 * Container for the main instance of the class.27	 *28	 * @since 5.0.029	 * @var WP_Block_Type_Registry|null30	 */31	private static $instance = null;32 33	/**34	 * Registers a block type.35	 *36	 * @since 5.0.037	 *38	 * @see WP_Block_Type::__construct()39	 *40	 * @param string|WP_Block_Type $name Block type name including namespace, or alternatively41	 *                                   a complete WP_Block_Type instance. In case a WP_Block_Type42	 *                                   is provided, the $args parameter will be ignored.43	 * @param array                $args Optional. Array of block type arguments. Accepts any public property44	 *                                   of `WP_Block_Type`. See WP_Block_Type::__construct() for information45	 *                                   on accepted arguments. Default empty array.46	 * @return WP_Block_Type|false The registered block type on success, or false on failure.47	 */48	public function register( $name, $args = array() ) {49		$block_type = null;50		if ( $name instanceof WP_Block_Type ) {51			$block_type = $name;52			$name       = $block_type->name;53		}54 55		if ( ! is_string( $name ) ) {56			_doing_it_wrong(57				__METHOD__,58				__( 'Block type names must be strings.' ),59				'5.0.0'60			);61			return false;62		}63 64		if ( preg_match( '/[A-Z]+/', $name ) ) {65			_doing_it_wrong(66				__METHOD__,67				__( 'Block type names must not contain uppercase characters.' ),68				'5.0.0'69			);70			return false;71		}72 73		$name_matcher = '/^[a-z0-9-]+\/[a-z0-9-]+$/';74		if ( ! preg_match( $name_matcher, $name ) ) {75			_doing_it_wrong(76				__METHOD__,77				__( 'Block type names must contain a namespace prefix. Example: my-plugin/my-custom-block-type' ),78				'5.0.0'79			);80			return false;81		}82 83		if ( $this->is_registered( $name ) ) {84			_doing_it_wrong(85				__METHOD__,86				/* translators: %s: Block name. */87				sprintf( __( 'Block type "%s" is already registered.' ), $name ),88				'5.0.0'89			);90			return false;91		}92 93		if ( ! $block_type ) {94			$block_type = new WP_Block_Type( $name, $args );