WP_Block_List

14#[AllowDynamicProperties]15class WP_Block_List implements Iterator, ArrayAccess, Countable {16 17	/**18	 * Original array of parsed block data, or block instances.19	 *20	 * @since 5.5.021	 * @var array[]|WP_Block[]22	 */23	protected $blocks;24 25	/**26	 * All available context of the current hierarchy.27	 *28	 * @since 5.5.029	 * @var array30	 */31	protected $available_context;32 33	/**34	 * Block type registry to use in constructing block instances.35	 *36	 * @since 5.5.037	 * @var WP_Block_Type_Registry38	 */39	protected $registry;40 41	/**42	 * Constructor.43	 *44	 * Populates object properties from the provided block instance argument.45	 *46	 * @since 5.5.047	 *48	 * @param array[]|WP_Block[]     $blocks            Array of parsed block data, or block instances.49	 * @param array                  $available_context Optional array of ancestry context values.50	 * @param WP_Block_Type_Registry $registry          Optional block type registry.51	 */52	public function __construct( $blocks, $available_context = array(), $registry = null ) {53		if ( ! $registry instanceof WP_Block_Type_Registry ) {54			$registry = WP_Block_Type_Registry::get_instance();55		}56 57		$this->blocks            = $blocks;58		$this->available_context = $available_context;59		$this->registry          = $registry;60	}61 62	/**63	 * Returns true if a block exists by the specified block offset, or false64	 * otherwise.65	 *66	 * @since 5.5.067	 *68	 * @link https://www.php.net/manual/en/arrayaccess.offsetexists.php69	 *70	 * @param int $offset Offset of block to check for.71	 * @return bool Whether block exists.72	 */73	#[ReturnTypeWillChange]74	public function offsetExists( $offset ) {75		return isset( $this->blocks[ $offset ] );76	}77 78	/**79	 * Returns the value by the specified block offset.80	 *81	 * @since 5.5.082	 *83	 * @link https://www.php.net/manual/en/arrayaccess.offsetget.php84	 *85	 * @param int $offset Offset of block value to retrieve.86	 * @return WP_Block|null Block value if exists, or null.87	 */88	#[ReturnTypeWillChange]89	public function offsetGet( $offset ) {90		$block = $this->blocks[ $offset ];91 92		if ( isset( $block ) && is_array( $block ) ) {93			$block = new WP_Block( $block, $this->available_context, $this->registry );