diff --git a/.gitignore b/.gitignore
index 33a39f7d..65079abb 100644
--- a/.gitignore
+++ b/.gitignore
@@ -55,7 +55,6 @@ Icon
 *.un~
 Session.vim
 .netrwhist
-*~
 
 
 ### PhpStorm ###
diff --git a/core/_install.php b/core/_install.php
index bf99bc21..a37553da 100644
--- a/core/_install.php
+++ b/core/_install.php
@@ -99,16 +99,6 @@ function check_im_version(): int
 
     return (empty($convert_check) ? 0 : 1);
 }
-
-function eok($name, $value)
-{
-    echo "<br>$name ... ";
-    if ($value) {
-        echo "<span style='color: green'>ok</span>\n";
-    } else {
-        echo "<span style='color: green'>failed</span>\n";
-    }
-}
 // }}}
 
 function do_install()
diff --git a/core/cacheengine.php b/core/cacheengine.php
index 7d78abff..f8ecbbcb 100644
--- a/core/cacheengine.php
+++ b/core/cacheengine.php
@@ -127,7 +127,7 @@ class RedisCache implements CacheEngine
 
     public function delete(string $key)
     {
-        $this->redis->delete($key);
+        $this->redis->del($key);
     }
 }
 
diff --git a/core/imageboard/image.php b/core/imageboard/image.php
index 2c1a632e..1be0b839 100644
--- a/core/imageboard/image.php
+++ b/core/imageboard/image.php
@@ -13,7 +13,6 @@ class Image
     public const IMAGE_DIR = "images";
     public const THUMBNAIL_DIR = "thumbs";
 
-    private static $tag_n = 0; // temp hack
     public static $order_sql = null; // this feels ugly
 
     /** @var null|int */
@@ -875,8 +874,6 @@ class Image
      */
     private static function build_search_querylet(array $tag_conditions, array $img_conditions): Querylet
     {
-        global $database;
-
         $positive_tag_count = 0;
         $negative_tag_count = 0;
         foreach ($tag_conditions as $tq) {
@@ -989,7 +986,6 @@ class Image
             }
         }
 
-        $sql = "";
         assert($positive_tag_id_array || $positive_wildcard_id_array || $negative_tag_id_array, @$_GET['q']);
         if (!empty($positive_tag_id_array) || !empty($positive_wildcard_id_array)) {
             $inner_joins = [];
diff --git a/core/polyfills.php b/core/polyfills.php
index 4f0b2c71..87e739e3 100644
--- a/core/polyfills.php
+++ b/core/polyfills.php
@@ -281,7 +281,6 @@ const MIME_TYPE_MAP = [
     'mpg' => 'video/mpeg',
     'mpeg' => 'video/mpeg',
     'mov' => 'video/quicktime',
-    'flv' => 'video/x-flv',
     'php' => 'text/x-php',
     'mp4' => 'video/mp4',
     'ogv' => 'video/ogg',
diff --git a/ext/bulk_actions/main.php b/ext/bulk_actions/main.php
index dbae2b4c..d622f216 100644
--- a/ext/bulk_actions/main.php
+++ b/ext/bulk_actions/main.php
@@ -54,7 +54,7 @@ class BulkActions extends Extension
 {
     public function onPostListBuilding(PostListBuildingEvent $event)
     {
-        global $config, $page, $user;
+        global $page, $user;
 
         if ($user->is_logged_in()) {
             $babbe = new BulkActionBlockBuildingEvent();
diff --git a/ext/bulk_actions/theme.php b/ext/bulk_actions/theme.php
index ed3c8a1e..9d1b854e 100644
--- a/ext/bulk_actions/theme.php
+++ b/ext/bulk_actions/theme.php
@@ -4,8 +4,6 @@ class BulkActionsTheme extends Themelet
 {
     public function display_selector(Page $page, array $actions, string $query)
     {
-        global $user;
-
         $body = "<input type='hidden' name='bulk_selected_ids' id='bulk_selected_ids' />
 				<input id='bulk_selector_activate' type='button' onclick='activate_bulk_selector();' value='Activate (M)anual Select' accesskey='m'/>
 				<div id='bulk_selector_controls' style='display: none;'>
diff --git a/ext/comment/main.php b/ext/comment/main.php
index b3bc2542..3791ea00 100644
--- a/ext/comment/main.php
+++ b/ext/comment/main.php
@@ -263,7 +263,7 @@ class CommentList extends Extension
 
     public function onPostListBuilding(PostListBuildingEvent $event)
     {
-        global $cache, $config, $database;
+        global $cache, $config;
         $cc = $config->get_int("comment_count");
         if ($cc > 0) {
             $recent = $cache->get("recent_comments");
diff --git a/ext/cron_uploader/main.php b/ext/cron_uploader/main.php
index e2886f99..68a85635 100644
--- a/ext/cron_uploader/main.php
+++ b/ext/cron_uploader/main.php
@@ -323,8 +323,6 @@ class CronUploader extends Extension
 
     private function move_uploaded($path, $filename, $output_subdir, $corrupt = false)
     {
-        global $config;
-
         // Create
         $newDir = $this->root_dir;
 
diff --git a/ext/danbooru_api/main.php b/ext/danbooru_api/main.php
index 304bd855..aa0ec9a7 100644
--- a/ext/danbooru_api/main.php
+++ b/ext/danbooru_api/main.php
@@ -242,7 +242,7 @@ class DanbooruApi extends Extension
      */
     private function api_add_post()
     {
-        global $user, $config, $page;
+        global $user, $page;
         $danboorup_kludge = 1;            // danboorup for firefox makes broken links out of location: /path
 
         // Check first if a login was supplied, if it wasn't check if the user is logged in via cookie
diff --git a/ext/ext_manager/main.php b/ext/ext_manager/main.php
index 8a4add73..9e057b02 100644
--- a/ext/ext_manager/main.php
+++ b/ext/ext_manager/main.php
@@ -122,7 +122,6 @@ class ExtManager extends Extension
         $extras = [];
 
         foreach (ExtensionInfo::get_all_keys() as $key) {
-            $matches = [];
             if (!in_array($key, $core) && isset($settings["ext_$key"])) {
                 $extras[] = $key;
             }
diff --git a/ext/featured/main.php b/ext/featured/main.php
index 63bc9cdb..1ea436f3 100644
--- a/ext/featured/main.php
+++ b/ext/featured/main.php
@@ -42,7 +42,7 @@ class Featured extends Extension
 
     public function onPostListBuilding(PostListBuildingEvent $event)
     {
-        global $cache, $config, $database, $page, $user;
+        global $cache, $config, $page, $user;
         $fid = $config->get_int("featured_id");
         if ($fid > 0) {
             $image = $cache->get("featured_image_object:$fid");
diff --git a/ext/forum/main.php b/ext/forum/main.php
index 064c09fe..e4c60df4 100644
--- a/ext/forum/main.php
+++ b/ext/forum/main.php
@@ -96,7 +96,7 @@ class Forum extends Extension
                     break;
                 case "view":
                     $threadID = int_escape($event->get_arg(1));
-                    $pageNumber = int_escape($event->get_arg(2));
+                    // $pageNumber = int_escape($event->get_arg(2));
                     list($errors) = $this->sanity_check_viewed_thread($threadID);
 
                     if ($errors!=null) {
diff --git a/ext/handle_404/main.php b/ext/handle_404/main.php
index 69ca4123..4c6bd74d 100644
--- a/ext/handle_404/main.php
+++ b/ext/handle_404/main.php
@@ -5,7 +5,7 @@ class Handle404 extends Extension
 {
     public function onPageRequest(PageRequestEvent $event)
     {
-        global $config, $page;
+        global $page;
         // hax.
         if ($page->mode == PageMode::PAGE && (!isset($page->blocks) || $this->count_main($page->blocks) == 0)) {
             $h_pagename = html_escape(implode('/', $event->args));
diff --git a/ext/handle_flash/main.php b/ext/handle_flash/main.php
index df93b408..9b738ee6 100644
--- a/ext/handle_flash/main.php
+++ b/ext/handle_flash/main.php
@@ -23,8 +23,6 @@ class FlashFileHandler extends DataHandlerExtension
 
     protected function create_thumb(string $hash, string $type): bool
     {
-        global $config;
-
         if (!Media::create_thumbnail_ffmpeg($hash)) {
             copy("ext/handle_flash/thumb.jpg", warehouse_path(Image::THUMBNAIL_DIR, $hash));
         }
diff --git a/ext/handle_video/main.php b/ext/handle_video/main.php
index 855e4662..fbd98b65 100644
--- a/ext/handle_video/main.php
+++ b/ext/handle_video/main.php
@@ -115,8 +115,6 @@ class VideoFileHandler extends DataHandlerExtension
                 $image->ext = "ogv";
                 break;
             case "video/flv":
-                $image->ext = "flv";
-                break;
             case "video/x-flv":
                 $image->ext = "flv";
                 break;
diff --git a/ext/help_pages/main.php b/ext/help_pages/main.php
index 015ad40f..ac7f4cf1 100644
--- a/ext/help_pages/main.php
+++ b/ext/help_pages/main.php
@@ -35,7 +35,7 @@ class HelpPages extends Extension
 
     public function onPageRequest(PageRequestEvent $event)
     {
-        global $page, $user;
+        global $page;
 
         if ($event->page_matches("help")) {
             $e = new HelpPageListBuildingEvent();
@@ -79,7 +79,6 @@ class HelpPages extends Extension
 
     public function onUserBlockBuilding(UserBlockBuildingEvent $event)
     {
-        global $user;
         $event->add_link("Help", make_link("help"));
     }
 
diff --git a/ext/image/main.php b/ext/image/main.php
index 48a838ec..2dc8f72b 100644
--- a/ext/image/main.php
+++ b/ext/image/main.php
@@ -81,7 +81,7 @@ class ImageIO extends Extension
     public function onImageAdminBlockBuilding(ImageAdminBlockBuildingEvent $event)
     {
         global $user;
-        
+
         if ($user->can(Permissions::DELETE_IMAGE)) {
             $event->add_part($this->theme->get_deleter_html($event->image->id));
         }
@@ -113,7 +113,7 @@ class ImageIO extends Extension
             throw new UploadException($e->error);
         }
     }
-    
+
     public function onUserPageBuilding(UserPageBuildingEvent $event)
     {
         $u_id = url_escape($event->display_user->id);
@@ -126,8 +126,6 @@ class ImageIO extends Extension
 
     public function onSetupBuilding(SetupBuildingEvent $event)
     {
-        global $config;
-
         $sb = new SetupBlock("Image Options");
         $sb->position = 30;
         // advanced only
@@ -141,9 +139,6 @@ class ImageIO extends Extension
 
         $event->panel->add_block($sb);
 
-
-
-
         $sb = new SetupBlock("Thumbnailing");
         $sb->add_choice_option(ImageConfig::THUMB_ENGINE, self::THUMBNAIL_ENGINES, "Engine: ");
         $sb->add_label("<br>");
@@ -161,7 +156,6 @@ class ImageIO extends Extension
         $sb->add_int_option(ImageConfig::THUMB_SCALING);
         $sb->add_label("%");
 
-
         $event->panel->add_block($sb);
     }
 
@@ -286,7 +280,7 @@ class ImageIO extends Extension
                 }
 
                 $page->set_file($file);
-                
+
                 if ($config->get_int(ImageConfig::EXPIRES)) {
                     $expires = date(DATE_RFC1123, time() + $config->get_int(ImageConfig::EXPIRES));
                 } else {
@@ -313,7 +307,7 @@ class ImageIO extends Extension
 
         /* Check to make sure the image exists. */
         $existing = Image::by_id($id);
-        
+
         if (is_null($existing)) {
             throw new ImageReplaceException("Image to replace does not exist!");
         }
diff --git a/ext/media/main.php b/ext/media/main.php
index 5c8c9957..24449e99 100644
--- a/ext/media/main.php
+++ b/ext/media/main.php
@@ -251,7 +251,7 @@ class Media extends Extension
 
     public function onPageRequest(PageRequestEvent $event)
     {
-        global $database, $page, $user;
+        global $page, $user;
 
         if ($event->page_matches("media_rescan/") && $user->can(Permissions::RESCAN_MEDIA) && isset($_POST['image_id'])) {
             $image = Image::by_id(int_escape($_POST['image_id']));
diff --git a/ext/media/theme.php b/ext/media/theme.php
index 15c3e03e..64a12851 100644
--- a/ext/media/theme.php
+++ b/ext/media/theme.php
@@ -4,7 +4,7 @@ class MediaTheme extends Themelet
 {
     public function display_form(array $types)
     {
-        global $page, $database;
+        global $page;
 
         $html = "Use this to force scanning for media properties.";
         $html .= make_form(make_link("admin/media_rescan"));
diff --git a/ext/oekaki/main.php b/ext/oekaki/main.php
index ec2125d0..9ba7f128 100644
--- a/ext/oekaki/main.php
+++ b/ext/oekaki/main.php
@@ -49,7 +49,7 @@ class Oekaki extends Extension
                 if (isset($_FILES["picture"])) {
                     header('Content-type: text/plain');
 
-                    $file = $_FILES['picture']['name'];
+                    //$file = $_FILES['picture']['name'];
                     //$ext = (strpos($file, '.') === FALSE) ? '' : substr($file, strrpos($file, '.'));
                     $uploadname = $_SERVER['REMOTE_ADDR'] . "." . time();
                     $uploadfile = data_path('oekaki_unclaimed/'.$uploadname);
diff --git a/ext/ouroboros_api/main.php b/ext/ouroboros_api/main.php
index 7bf969ea..dfc4aa5c 100644
--- a/ext/ouroboros_api/main.php
+++ b/ext/ouroboros_api/main.php
@@ -589,17 +589,7 @@ class OuroborosAPI extends Extension
                 );
                 break;
             case 'count':
-                $tag_data = $database->get_all(
-                    "
-                                                    SELECT id, tag, count
-                                                    FROM tags
-                                                    WHERE count >= :tags_min
-                                                    ORDER BY count DESC, tag ASC LIMIT :start, :max_items
-                                                    ",
-                    ['tags_min' => $config->get_int(TagListConfig::TAGS_MIN), 'start' => $start, 'max_items' => $limit]
-                );
-                break;
-            case 'date':
+            default:
                 $tag_data = $database->get_all(
                     "
                                                     SELECT id, tag, count
diff --git a/ext/pools/main.php b/ext/pools/main.php
index 6604e4f2..15e36c99 100644
--- a/ext/pools/main.php
+++ b/ext/pools/main.php
@@ -153,7 +153,7 @@ class Pools extends Extension
 
     public function onPageRequest(PageRequestEvent $event)
     {
-        global $page, $user, $database;
+        global $page, $user;
 
         if ($event->page_matches("pool")) {
             $pool_id = 0;
@@ -428,7 +428,7 @@ class Pools extends Extension
 
     public function onBulkActionBlockBuilding(BulkActionBlockBuildingEvent $event)
     {
-        global $user, $database;
+        global $database;
 
         $pools = $database->get_all("SELECT * FROM pools ORDER BY title ");
 
diff --git a/ext/post_titles/main.php b/ext/post_titles/main.php
index 6819d524..b9eb167f 100644
--- a/ext/post_titles/main.php
+++ b/ext/post_titles/main.php
@@ -12,7 +12,7 @@ class PostTitles extends Extension
 
     public function onInitExt(InitExtEvent $event)
     {
-        global $config, $database;
+        global $config;
 
         $config->set_default_bool(PostTitlesConfig::DEFAULT_TO_FILENAME, false);
         $config->set_default_bool(PostTitlesConfig::SHOW_IN_WINDOW_TITLE, false);
diff --git a/ext/rating/main.php b/ext/rating/main.php
index dfc1071f..aa18cabd 100644
--- a/ext/rating/main.php
+++ b/ext/rating/main.php
@@ -128,7 +128,7 @@ class Ratings extends Extension
 
     public function onInitExt(InitExtEvent $event)
     {
-        global $user, $config, $_shm_user_classes, $_shm_ratings;
+        global $config, $_shm_user_classes, $_shm_ratings;
 
         if ($config->get_int(RatingsConfig::VERSION) < 4) {
             $this->install();
@@ -149,7 +149,7 @@ class Ratings extends Extension
 
     public function onUserOptionsBuilding(UserOptionsBuildingEvent $event)
     {
-        global $user, $user_config;
+        global $user;
 
         $event->add__html(
             $this->theme->get_user_options(
@@ -162,7 +162,7 @@ class Ratings extends Extension
 
     public function onSetupBuilding(SetupBuildingEvent $event)
     {
-        global $config, $_shm_user_classes, $_shm_ratings;
+        global $_shm_user_classes;
 
         $ratings = self::get_sorted_ratings();
 
@@ -238,8 +238,6 @@ class Ratings extends Extension
 
     public function onHelpPageBuilding(HelpPageBuildingEvent $event)
     {
-        global $user;
-
         if ($event->key===HelpPages::SEARCH) {
             $block = new Block();
             $block->header = "Ratings";
@@ -507,7 +505,7 @@ class Ratings extends Extension
      */
     private function can_rate(): bool
     {
-        global $config, $user;
+        global $user;
         if ($user->can("edit_image_rating")) {
             return true;
         }
diff --git a/ext/rating/theme.php b/ext/rating/theme.php
index 19ef6354..19908586 100644
--- a/ext/rating/theme.php
+++ b/ext/rating/theme.php
@@ -26,7 +26,7 @@ class RatingsTheme extends Themelet
 
     public function display_form(array $current_ratings, array $available_ratings)
     {
-        global $page, $database;
+        global $page;
 
         $html = make_form(make_link("admin/update_ratings"))."<table class='form'><tr>
         <th>Change</th><td><select name='rating_old' required='required'><option></option>";
@@ -66,8 +66,6 @@ class RatingsTheme extends Themelet
 
     public function get_selection_rater_html(array $selected_options, bool $multiple = false, array $available_options = null)
     {
-        global $_shm_ratings;
-
         $output = "<select name='rating".($multiple ? "[]' multiple='multiple'" : "' ")." >";
 
         $options = Ratings::get_sorted_ratings();
@@ -111,7 +109,7 @@ class RatingsTheme extends Themelet
         $output .= "</table>";
         return $output;
     }
-        
+
     public function get_user_options(User $user, array $selected_ratings, array $available_ratings): string
     {
         $html = "
diff --git a/ext/regen_thumb/main.php b/ext/regen_thumb/main.php
index 31de0ed7..5be9b5f7 100644
--- a/ext/regen_thumb/main.php
+++ b/ext/regen_thumb/main.php
@@ -14,7 +14,7 @@ class RegenThumb extends Extension
 
     public function onPageRequest(PageRequestEvent $event)
     {
-        global $database, $page, $user;
+        global $page, $user;
 
         if ($event->page_matches("regen_thumb/one") && $user->can(Permissions::DELETE_IMAGE) && isset($_POST['image_id'])) {
             $image = Image::by_id(int_escape($_POST['image_id']));
@@ -93,8 +93,6 @@ class RegenThumb extends Extension
 
     public function onAdminAction(AdminActionEvent $event)
     {
-        global $database;
-
         switch ($event->action) {
             case "regen_thumbs":
             $event->redirect = true;
diff --git a/ext/resize/main.php b/ext/resize/main.php
index ea133340..4ca8819e 100644
--- a/ext/resize/main.php
+++ b/ext/resize/main.php
@@ -171,7 +171,7 @@ class ResizeImage extends Extension
     /* ----------------------------- */
     private function resize_image(Image $image_obj, int $width, int $height)
     {
-        global $database, $config;
+        global $config;
 
         if (($height <= 0) && ($width <= 0)) {
             throw new ImageResizeException("Invalid options for height and width. ($width x $height)");
diff --git a/ext/rotate/main.php b/ext/rotate/main.php
index 1e0ece42..3b176a7c 100644
--- a/ext/rotate/main.php
+++ b/ext/rotate/main.php
@@ -99,8 +99,6 @@ class RotateImage extends Extension
     /* ----------------------------- */
     private function rotate_image(int $image_id, int $deg)
     {
-        global $database;
-
         if (($deg <= -360) || ($deg >= 360)) {
             throw new ImageRotateException("Invalid options for rotation angle. ($deg)");
         }
@@ -177,7 +175,6 @@ class RotateImage extends Extension
         }
 
         /* Output to the same format as the original image */
-        $result = false;
         switch ($info[2]) {
           case IMAGETYPE_GIF:   $result = imagegif($image_rotated, $tmp_filename);      break;
           case IMAGETYPE_JPEG:  $result = imagejpeg($image_rotated, $tmp_filename);     break;
diff --git a/ext/rss_images/main.php b/ext/rss_images/main.php
index c12ad1db..8c164dfa 100644
--- a/ext/rss_images/main.php
+++ b/ext/rss_images/main.php
@@ -76,7 +76,7 @@ class RSSImages extends Extension
 
     private function thumb(Image $image): string
     {
-        global $cache, $database;
+        global $cache;
 
         $cached = $cache->get("rss-thumb:{$image->id}");
         if ($cached) {
diff --git a/ext/setup/main.php b/ext/setup/main.php
index ae622c2a..676442fe 100644
--- a/ext/setup/main.php
+++ b/ext/setup/main.php
@@ -138,8 +138,6 @@ class SetupBlock extends Block
 
     private function format_option(string $name, $html, ?string $label, bool $table_row)
     {
-        global $config;
-
         if ($table_row) {
             $this->start_table_row();
         }
diff --git a/ext/system/main.php b/ext/system/main.php
index 5c9a21d1..7a78a113 100644
--- a/ext/system/main.php
+++ b/ext/system/main.php
@@ -4,7 +4,7 @@ class System extends Extension
 {
     public function onPageRequest(PageRequestEvent $event)
     {
-        global $page, $user;
+        global $page;
 
         if ($event->page_matches("system")) {
             $e = new PageSubNavBuildingEvent("system");
diff --git a/ext/tag_list/main.php b/ext/tag_list/main.php
index a1ce5aab..24bdb92a 100644
--- a/ext/tag_list/main.php
+++ b/ext/tag_list/main.php
@@ -189,7 +189,6 @@ class TagList extends Extension
         $results = $cache->get("tag_list_omitted_tags:".$tags_config);
 
         if ($results==null) {
-            $results = [];
             $tags = explode(" ", $tags_config);
 
             if (empty($tags)) {
@@ -572,7 +571,7 @@ class TagList extends Extension
      */
     private function add_refine_block(Page $page, array $search)
     {
-        global $database, $config;
+        global $config;
 
         if (count($search) > 5) {
             return;
diff --git a/ext/transcode/main.php b/ext/transcode/main.php
index efc6d848..73623dab 100644
--- a/ext/transcode/main.php
+++ b/ext/transcode/main.php
@@ -100,7 +100,7 @@ class TranscodeImage extends Extension
 
     public function onDataUpload(DataUploadEvent $event)
     {
-        global $config, $page;
+        global $config;
 
         if ($config->get_bool(TranscodeConfig::UPLOAD) == true) {
             $ext = strtolower($event->type);
@@ -196,7 +196,7 @@ class TranscodeImage extends Extension
                             $database->commit();
                             $total++;
                         } catch (Exception $e) {
-                            log_error("transcode", "Error while bulk transcode on item $id to $format: ".$e->getMessage());
+                            log_error("transcode", "Error while bulk transcode on item {$image->id} to $format: ".$e->getMessage());
                             try {
                                 $database->rollback();
                             } catch (Exception $e) {
@@ -291,6 +291,8 @@ class TranscodeImage extends Extension
                 return $this->transcode_image_gd($source_name, $source_format, $target_format);
             case "convert":
                 return $this->transcode_image_convert($source_name, $source_format, $target_format);
+            default:
+                throw new ImageTranscodeException("No engine specified");
         }
     }
 
diff --git a/ext/transcode/theme.php b/ext/transcode/theme.php
index c52953b4..00ca6148 100644
--- a/ext/transcode/theme.php
+++ b/ext/transcode/theme.php
@@ -7,8 +7,6 @@ class TranscodeImageTheme extends Themelet
      */
     public function get_transcode_html(Image $image, array $options)
     {
-        global $config;
-
         $html = "
 			".make_form(
             make_link("transcode/{$image->id}"),
@@ -23,10 +21,10 @@ class TranscodeImageTheme extends Themelet
 				<br><input id='transcodebutton' type='submit' value='Transcode'>
 			</form>
 		";
-        
+
         return $html;
     }
-    
+
     public function get_transcode_picker_html(array $options)
     {
         $html = "<select id='transcode_format'  name='transcode_format' required='required' >";
diff --git a/ext/trash/main.php b/ext/trash/main.php
index 2fc7febf..caef44aa 100644
--- a/ext/trash/main.php
+++ b/ext/trash/main.php
@@ -115,7 +115,7 @@ class Trash extends Extension
     }
     public function onImageAdminBlockBuilding(ImageAdminBlockBuildingEvent $event)
     {
-        global $config, $database, $user;
+        global $user;
         if ($event->image->trash===true && $user->can(Permissions::VIEW_TRASH)) {
             $event->add_part($this->theme->get_image_admin_html($event->image->id));
         }
diff --git a/ext/user/main.php b/ext/user/main.php
index 4f3c25d1..71e62d1f 100644
--- a/ext/user/main.php
+++ b/ext/user/main.php
@@ -343,8 +343,7 @@ class UserPage extends Extension
     // Things done *with* the user {{{
     private function page_login($name, $pass)
     {
-        global $config, $user, $page;
-
+        global $config, $page;
 
         if (empty($name) || empty($pass)) {
             $this->theme->display_error(400, "Error", "Username or password left blank");
diff --git a/ext/user/theme.php b/ext/user/theme.php
index fbed0d82..06ebc887 100644
--- a/ext/user/theme.php
+++ b/ext/user/theme.php
@@ -234,7 +234,7 @@ class UserPageTheme extends Themelet
 
     public function display_user_page(User $duser, $stats)
     {
-        global $page, $user;
+        global $page;
         assert(is_array($stats));
         $stats[] = 'User ID: '.$duser->id;
 
@@ -249,7 +249,7 @@ class UserPageTheme extends Themelet
         global $config, $user;
         $html = "";
         if ($duser->id != $config->get_int('anon_id')) {  //justa fool-admin protection so they dont mess around with anon users.
-        
+
             if ($user->can(Permissions::EDIT_USER_NAME)) {
                 $html .= "
 				<p>".make_form(make_link("user_admin/change_name"))."
diff --git a/themes/danbooru/layout.class.php b/themes/danbooru/layout.class.php
index 68c315f1..7c36d08b 100644
--- a/themes/danbooru/layout.class.php
+++ b/themes/danbooru/layout.class.php
@@ -46,7 +46,7 @@ class Layout
 {
     public function display_page(Page $page, array $nav_links, array $sub_links)
     {
-        global $config, $user;
+        global $config;
 
         $theme_name = $config->get_string(SetupConfig::THEME);
         //$base_href = $config->get_string('base_href');
@@ -174,7 +174,7 @@ $header_html
 </html>
 EOD;
     }
-    
+
     /**
      * #param string[] $pages_matched
      */
diff --git a/themes/danbooru2/ext_manager.theme.php b/themes/danbooru2/ext_manager.theme.php
index 270ec929..247406c8 100644
--- a/themes/danbooru2/ext_manager.theme.php
+++ b/themes/danbooru2/ext_manager.theme.php
@@ -8,7 +8,7 @@ class CustomExtManagerTheme extends ExtManagerTheme
         parent::display_table($page, $extensions, $editable);
     }
 
-    public function display_doc(Page $page, ExtensionManagerInfo $info)
+    public function display_doc(Page $page, ExtensionInfo $info)
     {
         $page->disable_left();
         parent::display_doc($page, $info);
diff --git a/themes/danbooru2/layout.class.php b/themes/danbooru2/layout.class.php
index abee7c4d..eba4e346 100644
--- a/themes/danbooru2/layout.class.php
+++ b/themes/danbooru2/layout.class.php
@@ -46,7 +46,7 @@ class Layout
 {
     public function display_page($page, array $nav_links, array $sub_links)
     {
-        global $config, $user;
+        global $config;
 
         //$theme_name = $config->get_string(SetupConfig::THEME);
         //$base_href = $config->get_string('base_href');
diff --git a/themes/default/layout.class.php b/themes/default/layout.class.php
index c1468e7f..9d6e80d6 100644
--- a/themes/default/layout.class.php
+++ b/themes/default/layout.class.php
@@ -9,8 +9,7 @@ class Layout
      */
     public function display_page(Page $page, array $nav_links)
     {
-        global $config;
-
+        //global $config;
         //$theme_name = $config->get_string(SetupConfig::THEME, 'default');
         //$data_href = get_base_href();
         $contact_link = contact_link();
diff --git a/themes/lite/layout.class.php b/themes/lite/layout.class.php
index ac011d57..2cbf1ccd 100644
--- a/themes/lite/layout.class.php
+++ b/themes/lite/layout.class.php
@@ -11,7 +11,7 @@ class Layout
 {
     public function display_page(Page $page, array $nav_links, array $sub_links)
     {
-        global $config, $user;
+        global $config;
 
         $theme_name = $config->get_string(SetupConfig::THEME, 'lite');
         $site_name = $config->get_string(SetupConfig::TITLE);
@@ -30,7 +30,7 @@ class Layout
             $custom_links .= $this->navlinks($nav_link->link, $nav_link->description, $nav_link->active);
         }
         $menu .= "{$custom_links}</div>";
-        
+
         $left_block_html = "";
         $main_block_html = "";
         $sub_block_html  = "";
diff --git a/themes/material/layout.class.php b/themes/material/layout.class.php
index ada06030..d74df253 100644
--- a/themes/material/layout.class.php
+++ b/themes/material/layout.class.php
@@ -14,7 +14,7 @@ class Layout
         $theme_name = $config->get_string(SetupConfig::THEME, 'material');
         $site_name = $config->get_string(SetupConfig::TITLE);
         $data_href = get_base_href();
-        $main_page = $config->get_string(SetupConfig::MAIN_PAGE);
+        // $main_page = $config->get_string(SetupConfig::MAIN_PAGE);
         $contact_link = contact_link();
         $site_link = make_link();
         $header_html = $page->get_all_html_headers();
@@ -26,7 +26,7 @@ class Layout
         $drawer_block_html = ""; //use exampled in user.theme.php & view.theme.php
         $toolbar_block_html = ""; // not used at this point
         $subtoolbar_block_html = ""; // use exampled in user.theme.php
-    $navigation = "";
+        // $navigation = "";
 
         $h_search = "
       <div class='mdl-textfield mdl-js-textfield mdl-textfield--expandable
@@ -201,13 +201,13 @@ EOD;
 
     public function rework_navigation(Block $block)
     {
-        $h = $block->header;
+        // $h = $block->header;
         $b = $block->body;
         $i = $block->id;
 
         $dom = new DomDocument();
         $dom->loadHTML($b);
-        $output = [];
+        // $output = [];
         $html = "<section id='$i'>\n<nav class='mdl-navigation'>\n";
         foreach ($dom->getElementsByTagName('a') as $item) {
             $item->setAttribute('class', 'mdl-navigation__link');
diff --git a/themes/material/view.theme.php b/themes/material/view.theme.php
index 601faf94..bd3745d8 100644
--- a/themes/material/view.theme.php
+++ b/themes/material/view.theme.php
@@ -22,13 +22,9 @@ class CustomViewImageTheme extends ViewImageTheme
 
     protected function build_pin(Image $image)
     {
-        global $database;
-
         if (isset($_GET['search'])) {
-            $search_terms = explode(' ', $_GET['search']);
             $query = "search=".url_escape($_GET['search']);
         } else {
-            $search_terms = [];
             $query = null;
         }