Merge 3eaf4829bb into f94423d491

[ticket/17491] Fix caching search results - master

phpBB/docs/events.md

@@ -1746,29 +1746,33 @@ overall_header_body_before
 overall_header_breadcrumb_append
 ===
 * Locations:
-    + styles/prosilver/template/navbar_header.html
+    + styles/prosilver/template/breadcrumbs.html
 * Since: 3.1.0-a1
+* Changed: 4.0.0-a1 Moved to breadcrumbs.html
 * Purpose: Add links to the list of breadcrumbs in the header
 
 overall_header_breadcrumb_prepend
 ===
 * Locations:
-    + styles/prosilver/template/navbar_header.html
+    + styles/prosilver/template/breadcrumbs.html
 * Since: 3.1.0-RC3
+* Changed: 4.0.0-a1 Moved to breadcrumbs.html
 * Purpose: Add links to the list of breadcrumbs in the header (after site-home, but before board-index)
 
 overall_header_breadcrumbs_after
 ===
 * Locations:
-    + styles/prosilver/template/navbar_header.html
+    + styles/prosilver/template/breadcrumbs.html
 * Since: 3.1.0-RC3
+* Changed: 4.0.0-a1 Moved to breadcrumbs.html
 * Purpose: Add content after the breadcrumbs (outside of the breadcrumbs container)
 
 overall_header_breadcrumbs_before
 ===
 * Locations:
-    + styles/prosilver/template/navbar_header.html
+    + styles/prosilver/template/breadcrumbs.html
 * Since: 3.1.0-RC3
+* Changed: 4.0.0-a1 Moved to breadcrumbs.html
 * Purpose: Add content before the breadcrumbs (outside of the breadcrumbs container)
 
 overall_header_content_before
@@ -1830,15 +1834,17 @@ overall_header_navigation_prepend
 overall_header_navlink_append
 ===
 * Locations:
-    + styles/prosilver/template/navbar_header.html
+    + styles/prosilver/template/breadcrumbs.html
 * Since: 3.1.0-b3
+* Changed: 4.0.0-a1 Moved to breadcrumbs.html
 * Purpose: Add content after each individual navlink (breadcrumb)
 
 overall_header_navlink_prepend
 ===
 * Locations:
-    + styles/prosilver/template/navbar_header.html
+    + styles/prosilver/template/breadcrumbs.html
 * Since: 3.1.0-b3
+* Changed: 4.0.0-a1 Moved to breadcrumbs.html
 * Purpose: Add content before each individual navlink (breadcrumb)
 
 overall_header_page_body_before

phpBB/phpbb/search/backend/base.php

@@ -112,10 +112,16 @@ abstract class base implements search_backend_interface
 				}
 			}
 
-			// If the sort direction differs from the direction in the cache, then reverse the ids array
+			// If the sort direction differs from the direction in the cache, then recalculate array keys
 			if ($reverse_ids)
 			{
-				$stored_ids = array_reverse($stored_ids);
+				$keys = array_keys($stored_ids);
+				array_walk($keys, function (&$value, $key) use ($result_count)
+					{
+						$value = ($value >= 0) ? $result_count - $value - 1 : $value;
+					}
+				);
+				$stored_ids = array_combine($keys, $stored_ids);
 			}
 
 			for ($i = $start, $n = $start + $per_page; ($i < $n) && ($i < $result_count); $i++)
@@ -166,6 +172,8 @@ abstract class base implements search_backend_interface
 		}
 
 		$store_ids = array_slice($id_ary, 0, $length);
+		$id_range = range($start, $start + $length - 1);
+		$store_ids = array_combine($id_range, $store_ids);
 
 		// create a new resultset if there is none for this search_key yet
 		// or add the ids to the existing resultset
@@ -200,29 +208,26 @@ abstract class base implements search_backend_interface
 			$this->db->sql_query($sql);
 
 			$store = array(-1 => $result_count, -2 => $sort_dir);
-			$id_range = range($start, $start + $length - 1);
 		}
 		else
 		{
 			// we use one set of results for both sort directions so we have to calculate the indizes
-			// for the reversed array and we also have to reverse the ids themselves
+			// for the reversed array
 			if ($store[-2] != $sort_dir)
 			{
-				$store_ids = array_reverse($store_ids);
-				$id_range = range($store[-1] - $start - $length, $store[-1] - $start - 1);
-			}
-			else
-			{
-				$id_range = range($start, $start + $length - 1);
+				$keys = array_keys($store_ids);
+				array_walk($keys, function (&$value, $key) use ($store) {
+					$value = $store[-1] - $value - 1;
+				});
+				$store_ids = array_combine($keys, $store_ids);
 			}
 		}
 
-		$store_ids = array_combine($id_range, $store_ids);
-
 		// append the ids
 		if (is_array($store_ids))
 		{
 			$store += $store_ids;
+			ksort($store);
 
 			// if the cache is too big
 			if (count($store) - 2 > 20 * $this->config['search_block_size'])

phpBB/phpbb/search/backend/fulltext_mysql.php

@@ -550,7 +550,6 @@ class fulltext_mysql extends base implements search_backend_interface
 		}
 		$this->db->sql_freeresult($result);
 
-		$id_ary = array_unique($id_ary);
 		// if the total result count is not cached yet, retrieve it from the db
 		if (!$result_count && count($id_ary))
 		{
@@ -576,10 +575,10 @@ class fulltext_mysql extends base implements search_backend_interface
 				$id_ary[] = (int) $row[$field];
 			}
 			$this->db->sql_freeresult($result);
-
-			$id_ary = array_unique($id_ary);
 		}
 
+		$id_ary = array_unique($id_ary);
+
 		// store the ids, from start on then delete anything that isn't on the current page because we only need ids for one page
 		$this->save_ids($search_key, implode(' ', $this->split_words), $author_ary, $result_count, $id_ary, $start, $sort_dir);
 		$id_ary = array_slice($id_ary, 0, (int) $per_page);
@@ -758,6 +757,8 @@ class fulltext_mysql extends base implements search_backend_interface
 		// Build the query for really selecting the post_ids
 		if ($type == 'posts')
 		{
+			// For sorting by non-unique columns, add unique sort key to avoid duplicated rows in results
+			$sql_sort .= ', p.post_id' . (($sort_dir == 'a') ? ' ASC' : ' DESC');
 			$sql = "SELECT $sql_select
 				FROM " . $sql_sort_table . POSTS_TABLE . ' p' . (($firstpost_only) ? ', ' . TOPICS_TABLE . ' t ' : ' ') . "
 				WHERE $sql_author
@@ -821,10 +822,10 @@ class fulltext_mysql extends base implements search_backend_interface
 				$id_ary[] = (int) $row[$field];
 			}
 			$this->db->sql_freeresult($result);
-
-			$id_ary = array_unique($id_ary);
 		}
 
+		$id_ary = array_unique($id_ary);
+
 		if (count($id_ary))
 		{
 			$this->save_ids($search_key, '', $author_ary, $result_count, $id_ary, $start, $sort_dir);

phpBB/phpbb/search/backend/fulltext_native.php

@@ -1004,6 +1004,8 @@ class fulltext_native extends base implements search_backend_interface
 			$this->db->sql_freeresult($result);
 		}
 
+		$id_ary = array_unique($id_ary);
+
 		// store the ids, from start on then delete anything that isn't on the current page because we only need ids for one page
 		$this->save_ids($search_key, $this->search_query, $author_ary, $total_results, $id_ary, $start, $sort_dir);
 		$id_ary = array_slice($id_ary, 0, (int) $per_page);
@@ -1225,6 +1227,8 @@ class fulltext_native extends base implements search_backend_interface
 		// Build the query for really selecting the post_ids
 		if ($type == 'posts')
 		{
+			// For sorting by non-unique columns, add unique sort key to avoid duplicated rows in results
+			$sql_sort .= ', p.post_id' . (($sort_dir == 'a') ? ' ASC' : ' DESC');
 			$sql = "SELECT $select
 				FROM " . $sql_sort_table . POSTS_TABLE . ' p' . (($firstpost_only) ? ', ' . TOPICS_TABLE . ' t' : '') . "
 				WHERE $sql_author
@@ -1289,6 +1293,8 @@ class fulltext_native extends base implements search_backend_interface
 			$this->db->sql_freeresult($result);
 		}
 
+		$id_ary = array_unique($id_ary);
+
 		if (count($id_ary))
 		{
 			$this->save_ids($search_key, '', $author_ary, $total_results, $id_ary, $start, $sort_dir);

phpBB/phpbb/search/backend/fulltext_postgres.php

@@ -478,8 +478,6 @@ class fulltext_postgres extends base implements search_backend_interface
 		}
 		$this->db->sql_freeresult($result);
 
-		$id_ary = array_unique($id_ary);
-
 		// if the total result count is not cached yet, retrieve it from the db
 		if (!$result_count)
 		{
@@ -509,10 +507,10 @@ class fulltext_postgres extends base implements search_backend_interface
 				$id_ary[] = $row[$field];
 			}
 			$this->db->sql_freeresult($result);
-
-			$id_ary = array_unique($id_ary);
 		}
 
+		$id_ary = array_unique($id_ary);
+
 		// store the ids, from start on then delete anything that isn't on the current page because we only need ids for one page
 		$this->save_ids($search_key, implode(' ', $this->split_words), $author_ary, $result_count, $id_ary, $start, $sort_dir);
 		$id_ary = array_slice($id_ary, 0, (int) $per_page);
@@ -683,6 +681,8 @@ class fulltext_postgres extends base implements search_backend_interface
 		// Build the query for really selecting the post_ids
 		if ($type == 'posts')
 		{
+			// For sorting by non-unique columns, add unique sort key to avoid duplicated rows in results
+			$sql_sort .= ', p.post_id' . (($sort_dir == 'a') ? ' ASC' : ' DESC');
 			$sql = "SELECT p.post_id
 				FROM " . $sql_sort_table . POSTS_TABLE . ' p' . (($firstpost_only) ? ', ' . TOPICS_TABLE . ' t ' : ' ') . "
 				WHERE $sql_author
@@ -775,10 +775,10 @@ class fulltext_postgres extends base implements search_backend_interface
 				$id_ary[] = (int) $row[$field];
 			}
 			$this->db->sql_freeresult($result);
-
-			$id_ary = array_unique($id_ary);
 		}
 
+		$id_ary = array_unique($id_ary);
+
 		if (count($id_ary))
 		{
 			$this->save_ids($search_key, '', $author_ary, $result_count, $id_ary, $start, $sort_dir);

phpBB/styles/prosilver/template/breadcrumbs.html

@@ -0,0 +1,53 @@
+<ul id="nav-breadcrumbs" class="nav-breadcrumbs linklist navlinks" role="menubar">
+	{% set MICRODATA = 'itemtype="https://schema.org/ListItem" itemprop="itemListElement" itemscope' %}
+	{% set navlink_position = 1 %}
+
+	{% EVENT overall_header_breadcrumbs_before %}
+
+	<li class="breadcrumbs" itemscope itemtype="https://schema.org/BreadcrumbList">
+		{% if U_SITE_HOME %}
+		<span class="crumb" {{ MICRODATA }}>
+						{% apply spaceless %}
+						<a itemprop="item" href="{{ U_SITE_HOME }}" data-navbar-reference="home">
+							{{ Icon('font', 'home', '', true, 'fas o-icon-baseline') }}
+							<span itemprop="name">{{ L_SITE_HOME }}</span>
+						</a>
+						{% endapply %}
+						<meta itemprop="position" content="{{ navlink_position }}{% set navlink_position = navlink_position + 1 %}">
+					</span>
+		{% endif %}
+
+		{% EVENT overall_header_breadcrumb_prepend %}
+
+		<span class="crumb" {{ MICRODATA }}>
+					{% apply spaceless %}
+					<a itemprop="item" href="{{ U_INDEX }}" accesskey="h" data-navbar-reference="index">
+						{% if not U_SITE_HOME %}{{ Icon('font', 'home', '', true, 'fas o-icon-baseline') }}{% endif %}
+						<span itemprop="name">{{ L_INDEX }}</span>
+					</a>
+					{% endapply %}
+					<meta itemprop="position" content="{{ navlink_position }}{% set navlink_position = navlink_position + 1 %}">
+				</span>
+
+		{% for navlink in navlinks %}
+		{% set NAVLINK_NAME = navlink.BREADCRUMB_NAME | default(navlink.FORUM_NAME) %}
+		{% set NAVLINK_LINK = navlink.U_BREADCRUMB | default(navlink.U_VIEW_FORUM) %}
+
+		{% EVENT overall_header_navlink_prepend %}
+		<span class="crumb" {{ MICRODATA }}{% if navlink.MICRODATA %} {{ navlink.MICRODATA }}{% endif %}>
+						{% apply spaceless %}
+						<a itemprop="item" href="{{ NAVLINK_LINK }}">
+							<span itemprop="name">{{ NAVLINK_NAME }}</span>
+						</a>
+						{% endapply %}
+						<meta itemprop="position" content="{{ navlink_position }}{% set navlink_position = navlink_position + 1 %}">
+					</span>
+		{% EVENT overall_header_navlink_append %}
+		{% endfor %}
+
+		{% EVENT overall_header_breadcrumb_append %}
+
+	</li>
+
+	{% EVENT overall_header_breadcrumbs_after %}
+</ul>

phpBB/styles/prosilver/template/faq_body.html

@@ -44,7 +44,7 @@
 <!-- END faq_block -->
 
 <div class="to-top-button">
-	<a href="#faqlinks">
+	<a href="#faqlinks" title="{{ lang('BACK_TO_TOP') }}">
 		{{ Icon('font', 'chevron-up', '', false) }}
 	</a>
 </div>

phpBB/styles/prosilver/template/navbar_header.html

@@ -203,68 +203,5 @@
 
 			{% endif %}
 		</ul>
-
-		<ul id="nav-breadcrumbs" class="nav-breadcrumbs linklist navlinks" role="menubar">
-			{% set MICRODATA = 'itemtype="https://schema.org/ListItem" itemprop="itemListElement" itemscope' %}
-			{% set navlink_position = 1 %}
-
-			{% EVENT overall_header_breadcrumbs_before %}
-
-			<li class="breadcrumbs" itemscope itemtype="https://schema.org/BreadcrumbList">
-				{% if U_SITE_HOME %}
-					<span class="crumb" {{ MICRODATA }}>
-						{% apply spaceless %}
-						<a itemprop="item" href="{{ U_SITE_HOME }}" data-navbar-reference="home">
-							{{ Icon('font', 'home', '', true, 'fas o-icon-baseline') }}
-							<span itemprop="name">{{ L_SITE_HOME }}</span>
-						</a>
-						{% endapply %}
-						<meta itemprop="position" content="{{ navlink_position }}{% set navlink_position = navlink_position + 1 %}">
-					</span>
-				{% endif %}
-
-				{% EVENT overall_header_breadcrumb_prepend %}
-
-				<span class="crumb" {{ MICRODATA }}>
-					{% apply spaceless %}
-					<a itemprop="item" href="{{ U_INDEX }}" accesskey="h" data-navbar-reference="index">
-						{% if not U_SITE_HOME %}{{ Icon('font', 'home', '', true, 'fas o-icon-baseline') }}{% endif %}
-						<span itemprop="name">{{ L_INDEX }}</span>
-					</a>
-					{% endapply %}
-					<meta itemprop="position" content="{{ navlink_position }}{% set navlink_position = navlink_position + 1 %}">
-				</span>
-
-				{% for navlink in navlinks %}
-					{% set NAVLINK_NAME = navlink.BREADCRUMB_NAME | default(navlink.FORUM_NAME) %}
-					{% set NAVLINK_LINK = navlink.U_BREADCRUMB | default(navlink.U_VIEW_FORUM) %}
-
-					{% EVENT overall_header_navlink_prepend %}
-					<span class="crumb" {{ MICRODATA }}{% if navlink.MICRODATA %} {{ navlink.MICRODATA }}{% endif %}>
-						{% apply spaceless %}
-						<a itemprop="item" href="{{ NAVLINK_LINK }}">
-							<span itemprop="name">{{ NAVLINK_NAME }}</span>
-						</a>
-						{% endapply %}
-						<meta itemprop="position" content="{{ navlink_position }}{% set navlink_position = navlink_position + 1 %}">
-					</span>
-					{% EVENT overall_header_navlink_append %}
-				{% endfor %}
-
-				{% EVENT overall_header_breadcrumb_append %}
-
-			</li>
-
-			{% EVENT overall_header_breadcrumbs_after %}
-
-			{% if S_DISPLAY_SEARCH and not S_IN_SEARCH %}
-				<li class="rightside responsive-search">
-					<a href="{{ U_SEARCH }}" title="{{ lang('SEARCH_ADV_EXPLAIN') }}" role="menuitem">
-						{{ Icon('font', 'search', lang('SEARCH'), true) }}
-					</a>
-				</li>
-			{% endif %}
-		</ul>
-
 	</div>
 </div>

phpBB/styles/prosilver/template/overall_header.html

@@ -68,7 +68,7 @@
 <!-- EVENT overall_header_stylesheets_after -->
 
 {% if NOTIFICATIONS_WEBPUSH_ENABLE %}
-	{% include('ucp_notifications_webpush.html') %}
+	{% include 'ucp_notifications_webpush.html' %}
 {% endif %}
 
 </head>
@@ -79,7 +79,11 @@
 <div id="wrap" class="wrap">
 	<a id="top" class="top-anchor" accesskey="t"></a>
 	<div id="page-header">
+		<!-- EVENT overall_header_navbar_before -->
+
 		<div class="headerbar" role="banner">
+
+			{% include 'navbar_header.html' %}
 		<!-- EVENT overall_header_headerbar_before -->
 			<div class="inner">
 
@@ -117,10 +121,10 @@
 			</div>
 			<!-- EVENT overall_header_headerbar_after -->
 		</div>
-		<!-- EVENT overall_header_navbar_before -->
-		<!-- INCLUDE navbar_header.html -->
 	</div>
 
+	{% include 'breadcrumbs.html' %}
+
 	<!-- EVENT overall_header_page_body_before -->
 
 	<a id="start_here" class="anchor"></a>

phpBB/styles/prosilver/template/viewtopic_body.html

@@ -423,9 +423,6 @@
 		<!-- EVENT viewtopic_body_postrow_back2top_before -->
 		<div class="back2top">
 			<!-- EVENT viewtopic_body_postrow_back2top_prepend -->
-			<a href="#top" class="top" title="{L_BACK_TO_TOP}">
-				{{ Icon('font', 'circle-chevron-up', lang('BACK_TO_TOP'), false, 'fas c-top-icon') }}
-			</a>
 			<!-- EVENT viewtopic_body_postrow_back2top_append -->
 		</div>
 		<!-- EVENT viewtopic_body_postrow_back2top_after -->
@@ -496,6 +493,12 @@
 	<!-- ENDIF -->
 </div>
 
+<div class="to-top-button">
+	<a href="#top" title="{{ lang('BACK_TO_TOP') }}">
+		{{ Icon('font', 'chevron-up', '', false) }}
+	</a>
+</div>
+
 <!-- EVENT viewtopic_body_footer_before -->
 <!-- INCLUDE jumpbox.html -->
 

phpBB/styles/prosilver/theme/colours.css

@@ -99,18 +99,19 @@ th a:hover {
 }
 
 /* round cornered boxes and backgrounds */
-.headerbar {
-	color: #ffffff;
+.headerbar,
+.headerbar h1 {
+	color: #eaf8ff;
 }
 
 .headerbar,
 .forumbg {
-	background-color: #13a4ec;
+	background-color: #4688ce;
 	background-repeat: repeat-x;
 }
 
 .forabg {
-	background-color: #13a4ec;
+	background-color: #4688ce;
 	background-repeat: repeat-x;
 }
 
@@ -118,6 +119,18 @@ th a:hover {
 	background-color: #c9dee8;
 }
 
+.headerbar .navbar a {
+	color: #eaf8ff;
+}
+
+.headerbar .navbar .dropdown a {
+	color: #0f4d8a;
+}
+
+.header-profile {
+	text-shadow: 0 0 1.75rem #eaf8ff;
+}
+
 .panel {
 	background-color: #f0f3f5;
 	color: #29303d;
@@ -814,6 +827,10 @@ dd.profile-warnings {
 /*  icon images */
 .site_logo { background-image: url("./images/site_logo.svg"); }
 
+.c-hero-logo-img g {
+	fill: #eaf8ff;
+}
+
 /*	colours and backgrounds for cp.css */
 
 /* main cp box */
@@ -1109,6 +1126,7 @@ input.disabled {
 
 .dropdown-extended .dropdown-extended-item {
 	border-top-color: #bdbdbd;
+	color: #47536b;
 }
 
 .dropdown-extended .dropdown-extended-item:hover {

phpBB/styles/prosilver/theme/common.css

@@ -17,7 +17,7 @@ body {
 	line-height: normal;
 	word-wrap: break-word;
 	margin: 0;
-	padding: 12px 0;
+	padding: 0 0 12px;
 	-webkit-print-color-adjust: exact;
 }
 
@@ -151,12 +151,13 @@ a:hover {
 /* Main blocks
 ---------------------------------------- */
 .wrap {
-	border: 1px solid transparent;
-	border-radius: 8px;
+	border: solid transparent;
+	border-width: 0 1px 1px;
+	border-radius: 0 0 8px 8px;
 	min-width: 625px;
 	max-width: 1152px;
 	margin: 0 auto;
-	padding: 15px;
+	padding: 0 15px 15px;
 }
 
 .page-body {
@@ -200,7 +201,7 @@ a:hover {
 /* Round cornered boxes and backgrounds
 ---------------------------------------- */
 .headerbar {
-	border-radius: 7px;
+	border-radius: 0 0 7px 7px;
 	display: flex;
 	flex-direction: column;
 	margin-bottom: 0.5rem;
@@ -212,6 +213,11 @@ a:hover {
 	padding: 3px 10px;
 }
 
+.headerbar .navbar {
+	background: none;
+	padding: calc(var(--ps-line-height) * 0.25) 5px calc(var(--ps-line-height) * 0.5);
+}
+
 .forabg {
 	border-radius: 7px;
 	clear: both;
@@ -340,6 +346,10 @@ ul.linklist .dropdown-up .dropdown {
 	bottom: 18px;
 }
 
+ul.nav-breadcrumbs {
+	margin: calc(var(--ps-line-height) * 0.75) 0;
+}
+
 /* Bulletin icons for list items
 ---------------------------------------- */
 ul.linklist.bulletin > li:before {

phpBB/styles/prosilver/theme/content.css

@@ -465,7 +465,7 @@ p.author {
 	clear: left;
 	overflow: hidden;
 	width: 100%;
-	margin-top: calc(var(--ps-font-small) * 1.4);
+	margin: calc(var(--ps-font-small) * 1.4) 0;
 	padding-top: 2px;
 }
 

phpBB/styles/prosilver/theme/responsive.css

@@ -328,7 +328,6 @@
 		vertical-align: bottom;
 		text-overflow: ellipsis;
 		overflow: hidden;
-		max-width: 100px;
 	}
 
 	/* Pagination

tests/functional/search/base.php

@@ -229,6 +229,159 @@ abstract class phpbb_functional_search_base extends phpbb_functional_test_case
 		$this->delete_topic($topic_multiple_results_count2['topic_id']);
 	}
 
+	public function test_caching_search_results()
+	{
+		global $phpbb_root_path;
+
+		// Sphinx search doesn't use phpBB search results caching
+		if (strpos($this->search_backend, 'fulltext_sphinx'))
+		{
+			$this->markTestSkipped("Sphinx search doesn't use phpBB search results caching");
+		}
+
+		$this->purge_cache();
+		$this->login();
+		$this->admin_login();
+
+		$crawler = self::request('GET', 'search.php?author_id=2&sr=posts');
+		$posts_found_text = $crawler->filter('.searchresults-title')->text();
+
+		// Get total user's post count
+		preg_match('!(\d+)!', $posts_found_text, $matches);
+		$posts_count = (int) $matches[1];
+
+		$this->assertStringContainsString("Search found $posts_count matches", $posts_found_text, $this->search_backend);
+
+		// Set this value to cache less results than total count
+		$sql = 'UPDATE ' . CONFIG_TABLE . '
+			SET config_value = ' . floor($posts_count / 3) . "
+			WHERE config_name = '" . $this->db->sql_escape('search_block_size') . "'";
+		$this->db->sql_query($sql);
+
+		// Temporarily set posts_per_page to the value allowing to get several pages (4+)
+		$crawler = self::request('GET', 'adm/index.php?sid=' . $this->sid . '&i=acp_board&mode=post');
+		$form = $crawler->selectButton('Submit')->form();
+		$values = $form->getValues();
+		$current_posts_per_page = $values['config[posts_per_page]'];
+		$values['config[posts_per_page]'] = floor($posts_count / 10);
+		$form->setValues($values);
+		$crawler = self::submit($form);
+		$this->assertEquals(1, $crawler->filter('.successbox')->count(), $this->search_backend);
+
+		// Now actually test caching search results
+		$this->purge_cache();
+
+		// Default sort direction is 'd' (descending), browse  the 1st page
+		$crawler = self::request('GET', 'search.php?author_id=2&sr=posts');
+		$pagination = $crawler->filter('.pagination')->eq(0);
+		$posts_found_text = $pagination->text();
+
+		$this->assertStringContainsString("Search found $posts_count matches", $posts_found_text, $this->search_backend);
+
+		// Filter all search result page links on the 1st page
+		$pagination = $pagination->filter('li > a')->reduce(
+			function ($node, $i)
+			{
+				return ($node->attr('class') == 'button');
+			}
+		);
+
+		// Get last page number
+		$last_page = (int) $pagination->last()->text();
+
+		// Browse the last search page
+		$crawler = self::$client->click($pagination->selectLink($last_page)->link());
+		$pagination = $crawler->filter('.pagination')->eq(0);
+
+		// Filter all search result page links on the last page
+		$pagination = $pagination->filter('li > a')->reduce(
+			function ($node, $i)
+			{
+				return ($node->attr('class') == 'button');
+			}
+		);
+
+		// Now change sort direction to ascending
+		$form = $crawler->selectButton('sort')->form();
+		$values = $form->getValues();
+		$values['sd'] = 'a';
+		$form->setValues($values);
+		$crawler = self::submit($form);
+
+		$pagination = $crawler->filter('.pagination')->eq(0);
+
+		// Filter all search result page links on the 1st page with new sort direction
+		$pagination = $pagination->filter('li > a')->reduce(
+			function ($node, $i)
+			{
+				return ($node->attr('class') == 'button');
+			}
+		);
+
+		// Browse the rest of search results pages with new sort direction
+		$pages = range(2, $last_page);
+		foreach ($pages as $page_number)
+		{
+			$crawler = self::$client->click($pagination->selectLink($page_number)->link());
+			$pagination = $crawler->filter('.pagination')->eq(0);
+			$pagination = $pagination->filter('li > a')->reduce(
+				function ($node, $i)
+				{
+					return ($node->attr('class') == 'button');
+				}
+			);
+		}
+
+		// Get search results cache varname
+		$finder = new \Symfony\Component\Finder\Finder();
+		$finder
+			->name('data_search_results_*.php')
+			->files()
+			->in($phpbb_root_path . 'cache/' . PHPBB_ENVIRONMENT);
+		$iterator = $finder->getIterator();
+		$iterator->rewind();
+		$cache_filename = $iterator->current();
+		$cache_varname = substr($cache_filename->getBasename('.php'), 4);
+
+		// Get cached post ids data
+		$cache = $this->get_cache_driver();
+		$post_ids_cached = $cache->get($cache_varname);
+		
+		$cached_results_count = count($post_ids_cached) - 2; // Don't count '-1' and '-2' indexes
+
+		$post_ids_cached_backup = $post_ids_cached;
+		
+		// Cached data still should have initial 'd' sort direction
+		$this->assertTrue($post_ids_cached[-2] === 'd', $this->search_backend);
+
+		// Cached search results count should be equal to displayed on search results page
+		$this->assertEquals($posts_count, $post_ids_cached[-1], $this->search_backend);
+
+		// Actual cached data array count should be equal to displayed on search results page too
+		$this->assertEquals($posts_count, $cached_results_count, $this->search_backend);
+
+		// Cached data array shouldn't change after removing duplicates. That is, it shouldn't have any duplicates.
+		unset($post_ids_cached[-2], $post_ids_cached[-1]);
+		unset($post_ids_cached_backup[-2], $post_ids_cached_backup[-1]);
+		$post_ids_cached = array_unique($post_ids_cached);
+		$this->assertEquals($post_ids_cached_backup, $post_ids_cached, $this->search_backend);
+
+		// Restore this value to default
+		$sql = 'UPDATE ' . CONFIG_TABLE . "
+			SET config_value = 250
+			WHERE config_name = '" . $this->db->sql_escape('search_block_size') . "'";
+		$this->db->sql_query($sql);
+
+		// Restore posts_per_page value
+		$crawler = self::request('GET', 'adm/index.php?sid=' . $this->sid . '&i=acp_board&mode=post');
+		$form = $crawler->selectButton('Submit')->form();
+		$values = $form->getValues();
+		$values['config[posts_per_page]'] = $current_posts_per_page;
+		$form->setValues($values);
+		$crawler = self::submit($form);
+		$this->assertEquals(1, $crawler->filter('.successbox')->count(), $this->search_backend);
+	}
+
 	protected function create_search_index($backend = null)
 	{
 		$this->add_lang('acp/search');