Fix for wrong locale code in the admin for core/get-site-info` ability

src/wp-includes/abilities.php

@@ -111,7 +111,11 @@
 
 				$result = array();
 				foreach ( $requested_fields as $field ) {
-					$result[ $field ] = get_bloginfo( $field );
+					if ( 'language' === $field ) {
+						$result[ $field ] = str_replace( '_', '-', get_option( 'WPLANG' ) ?: 'en_US' );
+					} else {
+						$result[ $field ] = get_bloginfo( $field );
+					}
 				}
 
 				return $result;

src/wp-includes/blocks/accordion-item/index.php

@@ -0,0 +1,75 @@
+<?php
+
+/**
+ * Server-side rendering of the `core/accordion-item` block.
+ *
+ * @package WordPress
+ * @since 6.9.0
+ *
+ * @param array $attributes The block attributes.
+ * @param string $content The block content.
+ *
+ * @return string Returns the updated markup.
+ */
+function block_core_accordion_item_render( $attributes, $content ) {
+	if ( ! $content ) {
+		return $content;
+	}
+
+	$p         = new WP_HTML_Tag_Processor( $content );
+	$unique_id = wp_unique_id( 'accordion-item-' );
+
+	// Initialize the state of the item on the server using a closure,
+	// since we need to get derived state based on the current context.
+	wp_interactivity_state(
+		'core/accordion',
+		array(
+			'isOpen' => function () {
+				$context = wp_interactivity_get_context();
+				return $context['openByDefault'];
+			},
+		)
+	);
+
+	if ( $p->next_tag( array( 'class_name' => 'wp-block-accordion-item' ) ) ) {
+		$open_by_default = $attributes['openByDefault'] ? 'true' : 'false';
+		$p->set_attribute( 'data-wp-context', '{ "id": "' . $unique_id . '", "openByDefault": ' . $open_by_default . ' }' );
+		$p->set_attribute( 'data-wp-class--is-open', 'state.isOpen' );
+		$p->set_attribute( 'data-wp-init', 'callbacks.initAccordionItems' );
+		$p->set_attribute( 'data-wp-on-window--hashchange', 'callbacks.hashChange' );
+
+		if ( $p->next_tag( array( 'class_name' => 'wp-block-accordion-heading__toggle' ) ) ) {
+			$p->set_attribute( 'data-wp-on--click', 'actions.toggle' );
+			$p->set_attribute( 'data-wp-on--keydown', 'actions.handleKeyDown' );
+			$p->set_attribute( 'id', $unique_id );
+			$p->set_attribute( 'aria-controls', $unique_id . '-panel' );
+			$p->set_attribute( 'data-wp-bind--aria-expanded', 'state.isOpen' );
+
+			if ( $p->next_tag( array( 'class_name' => 'wp-block-accordion-panel' ) ) ) {
+				$p->set_attribute( 'id', $unique_id . '-panel' );
+				$p->set_attribute( 'aria-labelledby', $unique_id );
+				$p->set_attribute( 'data-wp-bind--inert', '!state.isOpen' );
+
+				// Only modify content if all directives have been set.
+				$content = $p->get_updated_html();
+			}
+		}
+	}
+
+	return $content;
+}
+
+/**
+ * Registers the `core/accordion-item` block on server.
+ *
+ * @since 6.9.0
+ */
+function register_block_core_accordion_item() {
+	register_block_type_from_metadata(
+		__DIR__ . '/accordion-item',
+		array(
+			'render_callback' => 'block_core_accordion_item_render',
+		)
+	);
+}
+add_action( 'init', 'register_block_core_accordion_item' );

src/wp-includes/blocks/accordion/index.php

@@ -0,0 +1,45 @@
+<?php
+/**
+ * Server-side rendering of the `core/accordion` block.
+ *
+ * @package WordPress
+ * @since 6.9.0
+ *
+ * @param array $attributes The block attributes.
+ * @param string $content The block content.
+ *
+ * @return string Returns the updated markup.
+ */
+function render_block_core_accordion( $attributes, $content ) {
+	if ( ! $content ) {
+		return $content;
+	}
+
+	$p         = new WP_HTML_Tag_Processor( $content );
+	$autoclose = $attributes['autoclose'] ? 'true' : 'false';
+
+	if ( $p->next_tag( array( 'class_name' => 'wp-block-accordion' ) ) ) {
+		$p->set_attribute( 'data-wp-interactive', 'core/accordion' );
+		$p->set_attribute( 'data-wp-context', '{ "autoclose": ' . $autoclose . ', "accordionItems": [] }' );
+
+		// Only modify content if directives have been set.
+		$content = $p->get_updated_html();
+	}
+
+	return $content;
+}
+
+/**
+ * Registers the `core/accordion` block on server.
+ *
+ * @since 6.9.0
+ */
+function register_block_core_accordion() {
+	register_block_type_from_metadata(
+		__DIR__ . '/accordion',
+		array(
+			'render_callback' => 'render_block_core_accordion',
+		)
+	);
+}
+add_action( 'init', 'register_block_core_accordion' );

src/wp-includes/blocks/archives/index.php

@@ -0,0 +1,174 @@
+<?php
+/**
+ * Server-side rendering of the `core/archives` block.
+ *
+ * @package WordPress
+ */
+
+/**
+ * Renders the `core/archives` block on server.
+ *
+ * @since 5.0.0
+ *
+ * @see WP_Widget_Archives
+ *
+ * @param array $attributes The block attributes.
+ *
+ * @return string Returns the post content with archives added.
+ */
+function render_block_core_archives( $attributes ) {
+	$show_post_count = ! empty( $attributes['showPostCounts'] );
+	$type            = $attributes['type'] ?? 'monthly';
+
+	$class = 'wp-block-archives-list';
+
+	if ( ! empty( $attributes['displayAsDropdown'] ) ) {
+
+		$class = 'wp-block-archives-dropdown';
+
+		$dropdown_id = wp_unique_id( 'wp-block-archives-' );
+		$title       = __( 'Archives' );
+
+		/** This filter is documented in wp-includes/widgets/class-wp-widget-archives.php */
+		$dropdown_args = apply_filters(
+			'widget_archives_dropdown_args',
+			array(
+				'type'            => $type,
+				'format'          => 'option',
+				'show_post_count' => $show_post_count,
+			)
+		);
+
+		$dropdown_args['echo'] = 0;
+
+		$archives = wp_get_archives( $dropdown_args );
+
+		$wrapper_attributes = get_block_wrapper_attributes( array( 'class' => $class ) );
+
+		switch ( $dropdown_args['type'] ) {
+			case 'yearly':
+				$label = __( 'Select Year' );
+				break;
+			case 'monthly':
+				$label = __( 'Select Month' );
+				break;
+			case 'daily':
+				$label = __( 'Select Day' );
+				break;
+			case 'weekly':
+				$label = __( 'Select Week' );
+				break;
+			default:
+				$label = __( 'Select Post' );
+				break;
+		}
+
+		$show_label = empty( $attributes['showLabel'] ) ? ' screen-reader-text' : '';
+
+		$block_content = '<label for="' . $dropdown_id . '" class="wp-block-archives__label' . $show_label . '">' . esc_html( $title ) . '</label>
+		<select id="' . esc_attr( $dropdown_id ) . '" name="archive-dropdown">
+		<option value="">' . esc_html( $label ) . '</option>' . $archives . '</select>';
+
+		// Inject the dropdown script immediately after the select dropdown.
+		$block_content .= block_core_archives_build_dropdown_script( $dropdown_id );
+
+		return sprintf(
+			'<div %1$s>%2$s</div>',
+			$wrapper_attributes,
+			$block_content
+		);
+	}
+
+	/** This filter is documented in wp-includes/widgets/class-wp-widget-archives.php */
+	$archives_args = apply_filters(
+		'widget_archives_args',
+		array(
+			'type'            => $type,
+			'show_post_count' => $show_post_count,
+		)
+	);
+
+	$archives_args['echo'] = 0;
+
+	$archives = wp_get_archives( $archives_args );
+
+	$wrapper_attributes = get_block_wrapper_attributes( array( 'class' => $class ) );
+
+	if ( empty( $archives ) ) {
+		return sprintf(
+			'<div %1$s>%2$s</div>',
+			$wrapper_attributes,
+			__( 'No archives to show.' )
+		);
+	}
+
+	return sprintf(
+		'<ul %1$s>%2$s</ul>',
+		$wrapper_attributes,
+		$archives
+	);
+}
+
+/**
+ * Generates the inline script for an archives dropdown field.
+ *
+ * @since 6.9.0
+ *
+ * @param string $dropdown_id ID of the dropdown field.
+ *
+ * @return string Returns the dropdown onChange redirection script.
+ */
+function block_core_archives_build_dropdown_script( $dropdown_id ) {
+	ob_start();
+
+	$exports = array( $dropdown_id, home_url() );
+	?>
+	<script>
+	( ( [ dropdownId, homeUrl ] ) => {
+		const dropdown = document.getElementById( dropdownId );
+		function onSelectChange() {
+			setTimeout( () => {
+				if ( 'escape' === dropdown.dataset.lastkey ) {
+					return;
+				}
+				if ( dropdown.value ) {
+					location.href = dropdown.value;
+				}
+			}, 250 );
+		}
+		function onKeyUp( event ) {
+			if ( 'Escape' === event.key ) {
+				dropdown.dataset.lastkey = 'escape';
+			} else {
+				delete dropdown.dataset.lastkey;
+			}
+		}
+		function onClick() {
+			delete dropdown.dataset.lastkey;
+		}
+		dropdown.addEventListener( 'keyup', onKeyUp );
+		dropdown.addEventListener( 'click', onClick );
+		dropdown.addEventListener( 'change', onSelectChange );
+	} )( <?php echo wp_json_encode( $exports, JSON_HEX_TAG | JSON_UNESCAPED_SLASHES ); ?> );
+	</script>
+	<?php
+	return wp_get_inline_script_tag(
+		trim( str_replace( array( '<script>', '</script>' ), '', ob_get_clean() ) ) .
+		"\n//# sourceURL=" . rawurlencode( __FUNCTION__ )
+	);
+}
+
+/**
+ * Register archives block.
+ *
+ * @since 5.0.0
+ */
+function register_block_core_archives() {
+	register_block_type_from_metadata(
+		__DIR__ . '/archives',
+		array(
+			'render_callback' => 'render_block_core_archives',
+		)
+	);
+}
+add_action( 'init', 'register_block_core_archives' );