渲染服务器上的`core/post-comments-form`区块。

function render_block_core_post_comments_form( $attributes, $content, $block ) {
	if ( ! isset( $block->context['postId'] ) ) {
		return '';
	}

	if ( post_password_required( $block->context['postId'] ) ) {
		return;
	}

	$classes = 'comment-respond'; // See comment further below.
	if ( isset( $attributes['textAlign'] ) ) {
		$classes .= ' has-text-align-' . $attributes['textAlign'];
	}

	$wrapper_attributes = get_block_wrapper_attributes( array( 'class' => $classes ) );

	add_filter( 'comment_form_defaults', 'post_comments_form_block_form_defaults' );

	ob_start();
	comment_form( array(), $block->context['postId'] );
	$form = ob_get_clean();

	remove_filter( 'comment_form_defaults', 'post_comments_form_block_form_defaults' );

	// We use the outermost wrapping `
` returned by `comment_form()`
	// which is identified by its default classname `comment-respond` to inject
	// our wrapper attributes. This way, it is guaranteed that all styling applied
	// to the block is carried along when the comment form is moved to the location
	// of the 'Reply' link that the user clicked by Core's `comment-reply.js` script.
	$form = str_replace( 'class="comment-respond"', $wrapper_attributes, $form );

	// Enqueue the comment-reply script.
	wp_enqueue_script( 'comment-reply' );

	return $form;
}