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✏️ Editing: footnotes.php

<?php
/**
 * Server-side rendering of the `core/footnotes` block.
 *
 * @package WordPress
 */

/**
 * Renders the `core/footnotes` block on the server.
 *
 * @since 6.3.0
 *
 * @param array    $attributes Block attributes.
 * @param string   $content    Block default content.
 * @param WP_Block $block      Block instance.
 *
 * @return string Returns the HTML representing the footnotes.
 */
function render_block_core_footnotes( $attributes, $content, $block ) {
	// Bail out early if the post ID is not set for some reason.
	if ( empty( $block->context['postId'] ) ) {
		return '';
	}

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

$footnotes = get_post_meta( $block->context['postId'], 'footnotes', true );

if ( ! $footnotes ) {
		return '';
	}

$footnotes = json_decode( $footnotes, true );

if ( ! is_array( $footnotes ) || count( $footnotes ) === 0 ) {
		return '';
	}

$wrapper_attributes = get_block_wrapper_attributes();
	$footnote_index     = 1;

$block_content = '';

foreach ( $footnotes as $footnote ) {
		// Translators: %d: Integer representing the number of return links on the page.
		$aria_label     = sprintf( __( 'Jump to footnote reference %1$d' ), $footnote_index );
		$block_content .= sprintf(
			'<li id="%1$s">%2$s <a href="#%1$s-link" aria-label="%3$s">↩︎</a></li>',
			esc_attr( $footnote['id'] ),
			wp_kses_post( $footnote['content'] ),
			esc_attr( $aria_label )
		);
		++$footnote_index;
	}

return sprintf(
		'<ol %1$s>%2$s</ol>',
		$wrapper_attributes,
		$block_content
	);
}

/**
 * Registers the `core/footnotes` block on the server.
 *
 * @since 6.3.0
 */
function register_block_core_footnotes() {
	register_block_type_from_metadata(
		__DIR__ . '/footnotes',
		array(
			'render_callback' => 'render_block_core_footnotes',
		)
	);
}
add_action( 'init', 'register_block_core_footnotes' );

/**
 * Registers the footnotes meta field required for footnotes to work.
 *
 * @since 6.5.0
 */
function register_block_core_footnotes_post_meta() {
	$post_types = get_post_types( array( 'show_in_rest' => true ) );
	foreach ( $post_types as $post_type ) {
		// Only register the meta field if the post type supports the editor, custom fields, and revisions.
		if (
			post_type_supports( $post_type, 'editor' ) &&
			post_type_supports( $post_type, 'custom-fields' ) &&
			post_type_supports( $post_type, 'revisions' )
		) {
			register_post_meta(
				$post_type,
				'footnotes',
				array(
					'show_in_rest'      => true,
					'single'            => true,
					'type'              => 'string',
					'revisions_enabled' => true,
				)
			);
		}
	}
}

/*
 * Most post types are registered at priority 10, so use priority 20 here in
 * order to catch them.
*/
add_action( 'init', 'register_block_core_footnotes_post_meta', 20 );

/**
 * Adds the footnotes field to the revisions display.
 *
 * @since 6.3.0
 *
 * @param array $fields The revision fields.
 * @return array The revision fields.
 */
function wp_add_footnotes_to_revision( $fields ) {
	$fields['footnotes'] = __( 'Footnotes' );
	return $fields;
}
add_filter( '_wp_post_revision_fields', 'wp_add_footnotes_to_revision' );

/**
 * Gets the footnotes field from the revision for the revisions screen.
 *
 * @since 6.3.0
 *
 * @param string $revision_field The field value, but $revision->$field
 *                               (footnotes) does not exist.
 * @param string $field          The field name, in this case "footnotes".
 * @param object $revision       The revision object to compare against.
 * @return string The field value.
 */
function wp_get_footnotes_from_revision( $revision_field, $field, $revision ) {
	return get_metadata( 'post', $revision->ID, $field, true );
}
add_filter( '_wp_post_revision_field_footnotes', 'wp_get_footnotes_from_revision', 10, 3 );

T	Name	Size
📁	..	-
📁	accordion	-
📁	accordion-heading	-
📁	accordion-item	-
📁	accordion-panel	-
📁	archives	-
📁	audio	-
📁	avatar	-
📁	block	-
📁	breadcrumbs	-
📁	button	-
📁	buttons	-
📁	calendar	-
📁	categories	-
📁	code	-
📁	column	-
📁	columns	-
📁	comment-author-name	-
📁	comment-content	-
📁	comment-date	-
📁	comment-edit-link	-
📁	comment-reply-link	-
📁	comment-template	-
📁	comments	-
📁	comments-pagination	-
📁	comments-pagination-next	-
📁	comments-pagination-numbers	-
📁	comments-pagination-previous	-
📁	comments-title	-
📁	cover	-
📁	details	-
📁	embed	-
📁	file	-
📁	footnotes	-
📁	freeform	-
📁	gallery	-
📁	group	-
📁	heading	-
📁	home-link	-
📁	html	-
📁	icon	-
📁	image	-
📁	latest-comments	-
📁	latest-posts	-
📁	legacy-widget	-
📁	list	-
📁	list-item	-
📁	loginout	-
📁	math	-
📁	media-text	-
📁	missing	-
📁	more	-
📁	navigation	-
📁	navigation-link	-
📁	navigation-overlay-close	-
📁	navigation-submenu	-
📁	nextpage	-
📁	page-list	-
📁	page-list-item	-
📁	paragraph	-
📁	pattern	-
📁	playlist	-
📁	playlist-track	-
📁	post-author	-
📁	post-author-biography	-
📁	post-author-name	-
📁	post-comments-count	-
📁	post-comments-form	-
📁	post-comments-link	-
📁	post-content	-
📁	post-date	-
📁	post-excerpt	-
📁	post-featured-image	-
📁	post-navigation-link	-
📁	post-template	-
📁	post-terms	-
📁	post-time-to-read	-
📁	post-title	-
📁	preformatted	-
📁	pullquote	-
📁	query	-
📁	query-no-results	-
📁	query-pagination	-
📁	query-pagination-next	-
📁	query-pagination-numbers	-
📁	query-pagination-previous	-
📁	query-title	-
📁	query-total	-
📁	quote	-
📁	read-more	-
📁	rss	-
📁	search	-
📁	separator	-
📁	shortcode	-
📁	site-logo	-
📁	site-tagline	-
📁	site-title	-
📁	social-link	-
📁	social-links	-
📁	spacer	-
📁	tab-list	-
📁	tab-panel	-
📁	tab-panels	-
📁	table	-
📁	tabs	-
📁	tag-cloud	-
📁	template-part	-
📁	term-count	-
📁	term-description	-
📁	term-name	-
📁	term-template	-
📁	terms-query	-
📁	text-columns	-
📁	verse	-
📁	video	-
📁	widget-group	-
📄	.blocks.php	0.00 B
📄	accordion-item.php	2.98 KB
📄	accordion.php	1.12 KB
📄	archives.php	4.28 KB
📄	avatar.php	5.51 KB
📄	block.php	3.05 KB
📄	blocks-json.php	205.72 KB
📄	breadcrumbs.php	18.61 KB
📄	button.php	4.11 KB
📄	calendar.php	5.93 KB
📄	categories.php	4.82 KB
📄	comment-author-name.php	2.09 KB
📄	comment-content.php	2.40 KB
📄	comment-date.php	1.82 KB
📄	comment-edit-link.php	1.67 KB
📄	comment-reply-link.php	2.03 KB
📄	comment-template.php	4.39 KB
📄	comments-pagination-next.php	1.88 KB
📄	comments-pagination-numbers.php	1.59 KB
📄	comments-pagination-previous.php	1.75 KB
📄	comments-pagination.php	1.23 KB
📄	comments-title.php	2.72 KB
📄	comments.php	6.63 KB
📄	cover.php	7.23 KB
📄	details.php	1.46 KB
📄	file.php	1.83 KB
📄	footnotes.php	3.73 KB
📄	gallery.php	21.82 KB
📄	heading.php	1.27 KB
📄	home-link.php	4.59 KB
📄	icon.php	4.27 KB
📄	image.php	17.23 KB
📄	index.php	4.98 KB
📄	latest-comments.php	5.49 KB
📄	latest-posts.php	10.21 KB
📄	legacy-widget.php	3.92 KB
📄	list.php	1.24 KB
📄	loginout.php	2.07 KB
📄	media-text.php	4.20 KB
📄	navigation-link.php	16.26 KB
📄	navigation-overlay-close.php	1.72 KB
📄	navigation-submenu.php	10.79 KB
📄	navigation.php	69.23 KB
📄	page-list-item.php	361.00 B
📄	page-list.php	13.54 KB
📄	paragraph.php	1.11 KB
📄	pattern.php	1.75 KB
📄	playlist-track.php	2.43 KB
📄	playlist.php	6.46 KB
📄	post-author-biography.php	1.49 KB
📄	post-author-name.php	1.92 KB
📄	post-author.php	2.67 KB
📄	post-comments-count.php	1.25 KB
📄	post-comments-form.php	2.74 KB
📄	post-comments-link.php	2.18 KB
📄	post-content.php	2.61 KB
📄	post-date.php	3.61 KB
📄	post-excerpt.php	4.21 KB
📄	post-featured-image.php	9.23 KB
📄	post-navigation-link.php	4.69 KB
📄	post-template.php	5.80 KB
📄	post-terms.php	3.55 KB
📄	post-time-to-read.php	6.26 KB
📄	post-title.php	2.09 KB
📄	query-no-results.php	1.80 KB
📄	query-pagination-next.php	3.59 KB
📄	query-pagination-numbers.php	4.59 KB
📄	query-pagination-previous.php	3.39 KB
📄	query-pagination.php	1.15 KB
📄	query-title.php	2.71 KB
📄	query-total.php	2.41 KB
📄	query.php	5.56 KB
📄	read-more.php	1.80 KB
📄	require-dynamic-blocks.php	5.13 KB
📄	require-static-blocks.php	535.00 B
📄	rss.php	4.50 KB
📄	search.php	25.00 KB
📄	shortcode.php	735.00 B
📄	site-logo.php	6.19 KB
📄	site-tagline.php	1.17 KB
📄	site-title.php	1.82 KB
📄	social-link.php	66.02 KB
📄	tab-list.php	2.27 KB
📄	tab-panel.php	1.63 KB
📄	tabs.php	3.86 KB
📄	tag-cloud.php	1.55 KB
📄	template-part.php	9.73 KB
📄	term-count.php	1.80 KB
📄	term-description.php	1.73 KB
📄	term-name.php	1.99 KB
📄	term-template.php	4.41 KB
📄	video.php	2.67 KB
📄	widget-group.php	2.38 KB