render_block_core_footnotes( array $attributes, string $content, WP_Block $block ): string

19function render_block_core_footnotes( $attributes, $content, $block ) {20	// Bail out early if the post ID is not set for some reason.21	if ( empty( $block->context['postId'] ) ) {22		return '';23	}24 25	if ( post_password_required( $block->context['postId'] ) ) {26		return '';27	}28 29	$footnotes = get_post_meta( $block->context['postId'], 'footnotes', true );30 31	if ( ! $footnotes ) {32		return '';33	}34 35	$footnotes = json_decode( $footnotes, true );36 37	if ( ! is_array( $footnotes ) || count( $footnotes ) === 0 ) {38		return '';39	}40 41	$wrapper_attributes = get_block_wrapper_attributes();42	$footnote_index     = 1;43 44	$block_content = '';45 46	foreach ( $footnotes as $footnote ) {47		// Translators: %d: Integer representing the number of return links on the page.48		$aria_label     = sprintf( __( 'Jump to footnote reference %1$d' ), $footnote_index );49		$block_content .= sprintf(50			'<li id="%1$s">%2$s <a href="#%1$s-link" aria-label="%3$s">↩︎</a></li>',51			esc_attr( $footnote['id'] ),52			wp_kses_post( $footnote['content'] ),53			esc_attr( $aria_label )54		);55		++$footnote_index;56	}57 58	return sprintf(59		'<ol %1$s>%2$s</ol>',60		$wrapper_attributes,61		$block_content62	);63}