Initial Drupal 11 with DDEV setup

web/core/modules/search/search.post_update.php

@@ -0,0 +1,37 @@
+<?php
+
+/**
+ * @file
+ * Post update functions for Search module.
+ */
+
+use Drupal\Core\Config\Entity\ConfigEntityUpdater;
+use Drupal\block\BlockInterface;
+
+/**
+ * Implements hook_removed_post_updates().
+ */
+function search_removed_post_updates(): array {
+  return [
+    'search_post_update_block_page' => '9.0.0',
+    'search_post_update_reindex_after_diacritics_rule_change' => '10.0.0',
+  ];
+}
+
+/**
+ * Updates Search Blocks' without an explicit `page_id` from '' to NULL.
+ */
+function search_post_update_block_with_empty_page_id(&$sandbox = []): void {
+  $config_entity_updater = \Drupal::classResolver(ConfigEntityUpdater::class);
+  $config_entity_updater->update($sandbox, 'block', function (BlockInterface $block): bool {
+    // Only update blocks using the search block plugin.
+    // @see search_block_presave()
+    if ($block->getPluginId() === 'search_form_block' && $block->get('settings')['page_id'] === '') {
+      $settings = $block->get('settings');
+      $settings['page_id'] = NULL;
+      $block->set('settings', $settings);
+      return TRUE;
+    }
+    return FALSE;
+  });
+}