diff -r 34716fd837a4 -r be944660c56a wp/wp-includes/blocks/post-template.php
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/wp/wp-includes/blocks/post-template.php	Wed Sep 21 18:19:35 2022 +0200
@@ -0,0 +1,88 @@
+<?php
+/**
+ * Server-side rendering of the `core/post-template` block.
+ *
+ * @package WordPress
+ */
+
+/**
+ * Renders the `core/post-template` block on the server.
+ *
+ * @param array    $attributes Block attributes.
+ * @param string   $content    Block default content.
+ * @param WP_Block $block      Block instance.
+ *
+ * @return string Returns the output of the query, structured using the layout defined by the block's inner blocks.
+ */
+function render_block_core_post_template( $attributes, $content, $block ) {
+	$page_key = isset( $block->context['queryId'] ) ? 'query-' . $block->context['queryId'] . '-page' : 'query-page';
+	$page     = empty( $_GET[ $page_key ] ) ? 1 : (int) $_GET[ $page_key ];
+
+	$query_args = build_query_vars_from_query_block( $block, $page );
+	// Override the custom query with the global query if needed.
+	$use_global_query = ( isset( $block->context['query']['inherit'] ) && $block->context['query']['inherit'] );
+	if ( $use_global_query ) {
+		global $wp_query;
+		if ( $wp_query && isset( $wp_query->query_vars ) && is_array( $wp_query->query_vars ) ) {
+			// Unset `offset` because if is set, $wp_query overrides/ignores the paged parameter and breaks pagination.
+			unset( $query_args['offset'] );
+			$query_args = wp_parse_args( $wp_query->query_vars, $query_args );
+
+			if ( empty( $query_args['post_type'] ) && is_singular() ) {
+				$query_args['post_type'] = get_post_type( get_the_ID() );
+			}
+		}
+	}
+
+	$query = new WP_Query( $query_args );
+
+	if ( ! $query->have_posts() ) {
+		return '';
+	}
+
+	$classnames = '';
+	if ( isset( $block->context['displayLayout'] ) && isset( $block->context['query'] ) ) {
+		if ( isset( $block->context['displayLayout']['type'] ) && 'flex' === $block->context['displayLayout']['type'] ) {
+			$classnames = "is-flex-container columns-{$block->context['displayLayout']['columns']}";
+		}
+	}
+
+	$wrapper_attributes = get_block_wrapper_attributes( array( 'class' => $classnames ) );
+
+	$content = '';
+	while ( $query->have_posts() ) {
+		$query->the_post();
+		$block_content = (
+			new WP_Block(
+				$block->parsed_block,
+				array(
+					'postType' => get_post_type(),
+					'postId'   => get_the_ID(),
+				)
+			)
+		)->render( array( 'dynamic' => false ) );
+		$content      .= "<li>{$block_content}</li>";
+	}
+
+	wp_reset_postdata();
+
+	return sprintf(
+		'<ul %1$s>%2$s</ul>',
+		$wrapper_attributes,
+		$content
+	);
+}
+
+/**
+ * Registers the `core/post-template` block on the server.
+ */
+function register_block_core_post_template() {
+	register_block_type_from_metadata(
+		__DIR__ . '/post-template',
+		array(
+			'render_callback'   => 'render_block_core_post_template',
+			'skip_inner_blocks' => true,
+		)
+	);
+}
+add_action( 'init', 'register_block_core_post_template' );