diff --git a/src/includes/classes/CdnFilters.php b/src/includes/classes/CdnFilters.php
index cabcf248..874e2e8d 100644
--- a/src/includes/classes/CdnFilters.php
+++ b/src/includes/classes/CdnFilters.php
@@ -243,14 +243,13 @@ protected function maybeSetupFilters()
         if (!$this->cdn_when_logged_in && $this->plugin->isLikeUserLoggedIn()) {
             return; // Disable in this case.
         }
-        $_this = $this; // Needed for closures below.
 
-        add_action('wp_head', function () use ($_this) {
-            $_this->completed_wp_head_action_hook = true;
+        add_action('wp_head', function () {
+            $this->completed_wp_head_action_hook = true;
         }, PHP_INT_MAX); // The very last hook, ideally.
 
-        add_action('wp_footer', function () use ($_this) {
-            $_this->started_wp_footer_action_hook = true;
+        add_action('wp_footer', function () {
+            $this->started_wp_footer_action_hook = true;
         }, -PHP_INT_MAX); // The very first hook, ideally.
 
         add_filter('home_url', array($this, 'urlFilter'), PHP_INT_MAX - 10, 4);
@@ -340,7 +339,6 @@ public function contentFilter($string)
         if (strpos($string, '<') === false) {
             return $string; // Nothing to do.
         }
-        $_this = $this; // Reference needed by closures below.
 
         $regex_url_attrs = '/'.// HTML attributes containing a URL.
 
@@ -361,9 +359,9 @@ public function contentFilter($string)
                            '/i'; // End regex pattern; case insensitive.
 
         $orig_string = $string; // In case of regex errors.
-        $string      = preg_replace_callback($regex_url_attrs, function ($m) use ($_this) {
+        $string      = preg_replace_callback($regex_url_attrs, function ($m) {
             unset($m[0]); // Discard full match.
-            $m[6] = $_this->filterUrl($m[6], null, true, null);
+            $m[6] = $this->filterUrl($m[6], null, true, null);
             return implode('', $m); // Concatenate all parts.
         }, $string); // End content filter.
 
diff --git a/src/includes/traits/Ac/PostloadUtils.php b/src/includes/traits/Ac/PostloadUtils.php
index 7bbe8710..5cb43d6c 100644
--- a/src/includes/traits/Ac/PostloadUtils.php
+++ b/src/includes/traits/Ac/PostloadUtils.php
@@ -216,13 +216,12 @@ public function maybeFilterStatusHeaderPostload()
         if (empty($this->postload['filter_status_header'])) {
             return; // Nothing to do in this case.
         }
-        $_this = $this; // Reference needed below.
 
         add_filter(
             'status_header',
-            function ($status_header, $status_code) use ($_this) {
+            function ($status_header, $status_code) {
                 if ($status_code > 0) {
-                    $_this->http_status = (integer) $status_code;
+                    $this->http_status = (integer) $status_code;
                 }
                 return $status_header;
             },
@@ -282,12 +281,11 @@ public function wpMainQueryPostload()
         $this->is_user_logged_in  = is_user_logged_in();
         $this->content_url        = rtrim(content_url(), '/');
         $this->is_maintenance     = $this->functionIsPossible('is_maintenance') && is_maintenance();
-        $_this                    = $this; // Reference for the closure below.
 
         add_action(
             'template_redirect',
-            function () use ($_this) {
-                $_this->is_a_wp_content_type = $_this->is_404 || $_this->is_maintenance
+            function () {
+                $this->is_a_wp_content_type = $this->is_404 || $this->is_maintenance
                                                || is_front_page() // See <https://core.trac.wordpress.org/ticket/21602#comment:7>
                                                || is_home() || is_singular() || is_archive() || is_post_type_archive() || is_tax() || is_search() || is_feed();
             },
diff --git a/src/includes/traits/Shared/CachePathUtils.php b/src/includes/traits/Shared/CachePathUtils.php
index 9d97c441..a986cf22 100644
--- a/src/includes/traits/Shared/CachePathUtils.php
+++ b/src/includes/traits/Shared/CachePathUtils.php
@@ -313,7 +313,6 @@ public function buildHostCachePathRegexFragsFromWcUris($uris, $regex_suffix_frag
         $uris              = trim((string) $uris);
         $regex_suffix_frag = $this->cachePathRegexSuffixFrag($regex_suffix_frag);
 
-        $_this = $this; // Reference for the closure below.
         $flags = $this::CACHE_PATH_ALLOW_WILDCARDS | $this::CACHE_PATH_NO_SCHEME | $this::CACHE_PATH_NO_HOST
                  | $this::CACHE_PATH_NO_PATH_INDEX | $this::CACHE_PATH_NO_QUV | $this::CACHE_PATH_NO_EXT;
 
@@ -324,7 +323,7 @@ public function buildHostCachePathRegexFragsFromWcUris($uris, $regex_suffix_frag
 
         foreach ($uri_patterns as $_key => &$_uri_pattern) {
             if (($_uri_pattern = trim($_uri_pattern, '^$'))) {
-                $_cache_path          = $_this->buildCachePath($host_url.'/'.trim($_uri_pattern, '/'), '', '', $flags);
+                $_cache_path          = $this->buildCachePath($host_url.'/'.trim($_uri_pattern, '/'), '', '', $flags);
                 $_relative_cache_path = preg_replace('/^'.preg_quote($host_cache_path, '/').'(?:\/|$)/i', '', $_cache_path);
                 $_uri_pattern         = $this->wdRegexToActualRegexFrag($_relative_cache_path);
             }