diff -r be944660c56a -r 3d72ae0968f4 wp/wp-includes/blocks/read-more.php
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/wp/wp-includes/blocks/read-more.php	Tue Sep 27 16:37:53 2022 +0200
@@ -0,0 +1,45 @@
+<?php
+/**
+ * Server-side rendering of the `core/read-more` block.
+ *
+ * @package WordPress
+ */
+
+/**
+ * Renders the `core/read-more` 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 post link.
+ */
+function render_block_core_read_more( $attributes, $content, $block ) {
+	if ( ! isset( $block->context['postId'] ) ) {
+		return '';
+	}
+
+	$post_ID            = $block->context['postId'];
+	$justify_class_name = empty( $attributes['justifyContent'] ) ? '' : "is-justified-{$attributes['justifyContent']}";
+	$wrapper_attributes = get_block_wrapper_attributes( array( 'class' => $justify_class_name ) );
+	$more_text          = ! empty( $attributes['content'] ) ? wp_kses_post( $attributes['content'] ) : __( 'Read more' );
+	return sprintf(
+		'<a %1s href="%2s" target="%3s">%4s</a>',
+		$wrapper_attributes,
+		get_the_permalink( $post_ID ),
+		esc_attr( $attributes['linkTarget'] ),
+		$more_text
+	);
+}
+
+/**
+ * Registers the `core/read-more` block on the server.
+ */
+function register_block_core_read_more() {
+	register_block_type_from_metadata(
+		__DIR__ . '/read-more',
+		array(
+			'render_callback' => 'render_block_core_read_more',
+		)
+	);
+}
+add_action( 'init', 'register_block_core_read_more' );