diff --git a/admin/admin_board.php b/admin/admin_board.php
index c2a534b03..27d71181a 100644
--- a/admin/admin_board.php
+++ b/admin/admin_board.php
@@ -14,7 +14,7 @@ if (!empty($setmodules)) {
 }
 require __DIR__ . '/pagestart.php';
 
-$mode = isset($_GET['mode']) ? $_GET['mode'] : '';
+$mode = $_GET['mode'] ?? '';
 
 $return_links = array(
     'index' => '<br /><br />' . sprintf($lang['CLICK_RETURN_ADMIN_INDEX'], '<a href="index.php?pane=right">', '</a>'),
@@ -34,7 +34,7 @@ if (!$result = DB()->sql_query($sql)) {
         $config_value = $row['config_value'];
         $default_config[$config_name] = $config_value;
 
-        $new[$config_name] = isset($_POST[$config_name]) ? $_POST[$config_name] : $default_config[$config_name];
+        $new[$config_name] = $_POST[$config_name] ?? $default_config[$config_name];
 
         if (isset($_POST['submit']) && $row['config_value'] != $new[$config_name]) {
             if ($config_name == 'seed_bonus_points' ||
diff --git a/admin/admin_cron.php b/admin/admin_cron.php
index 82c108464..9bf4d2acc 100644
--- a/admin/admin_cron.php
+++ b/admin/admin_cron.php
@@ -14,11 +14,11 @@ if (!empty($setmodules)) {
     return;
 }
 
-$mode = isset($_GET['mode']) ? $_GET['mode'] : '';
+$mode = $_GET['mode'] ?? '';
 $job_id = isset($_GET['id']) ? (int)$_GET['id'] : '';
 $submit = isset($_POST['submit']);
 $jobs = isset($_POST['select']) ? implode(',', $_POST['select']) : '';
-$cron_action = isset($_POST['cron_action']) ? $_POST['cron_action'] : '';
+$cron_action = $_POST['cron_action'] ?? '';
 
 if ($mode == 'run' && !$job_id) {
     define('BB_ROOT', './../');
@@ -40,7 +40,7 @@ foreach ($sql as $row) {
     $config_value = $row['config_value'];
     $default_config[$config_name] = $config_value;
 
-    $new[$config_name] = isset($_POST[$config_name]) ? $_POST[$config_name] : $default_config[$config_name];
+    $new[$config_name] = $_POST[$config_name] ?? $default_config[$config_name];
 
     if (isset($_POST['submit']) && $row['config_value'] != $new[$config_name]) {
         bb_update_config(array($config_name => $new[$config_name]));
diff --git a/admin/admin_extensions.php b/admin/admin_extensions.php
index 95486cd27..ea4f61631 100644
--- a/admin/admin_extensions.php
+++ b/admin/admin_extensions.php
@@ -371,7 +371,7 @@ if ($mode == 'groups') {
 
     $template->assign_vars(array(
         'TPL_ATTACH_EXTENSION_GROUPS' => true,
-        'ADD_GROUP_NAME' => isset($extension_group) ? $extension_group : '',
+        'ADD_GROUP_NAME' => $extension_group ?? '',
         'MAX_FILESIZE' => $max_add_filesize,
         'S_FILESIZE' => size_select('add_size_select', $size),
         'S_ADD_DOWNLOAD_MODE' => download_select('add_download_mode'),
diff --git a/admin/admin_forums.php b/admin/admin_forums.php
index 44c2b678a..6b541fdca 100644
--- a/admin/admin_forums.php
+++ b/admin/admin_forums.php
@@ -559,8 +559,8 @@ if ($mode) {
             $move_down_forum_id = false;
             $forums = $cat_forums[$cat_id]['f_ord'];
             $forum_order = $forum_info['forum_order'];
-            $prev_forum = isset($forums[$forum_order - 10]) ? $forums[$forum_order - 10] : false;
-            $next_forum = isset($forums[$forum_order + 10]) ? $forums[$forum_order + 10] : false;
+            $prev_forum = $forums[$forum_order - 10] ?? false;
+            $next_forum = $forums[$forum_order + 10] ?? false;
 
             // move selected forum ($forum_id) UP
             if ($move < 0 && $prev_forum) {
diff --git a/admin/admin_groups.php b/admin/admin_groups.php
index fc27b10c6..9bc6fcae8 100644
--- a/admin/admin_groups.php
+++ b/admin/admin_groups.php
@@ -87,7 +87,7 @@ if (!empty($_POST['edit']) || !empty($_POST['new'])) {
         $release_group = isset($_POST['release_group']) ? (int)$_POST['release_group'] : 0;
         $group_name = isset($_POST['group_name']) ? trim($_POST['group_name']) : '';
         $group_desc = isset($_POST['group_description']) ? trim($_POST['group_description']) : '';
-        $group_moderator = isset($_POST['username']) ? $_POST['username'] : '';
+        $group_moderator = $_POST['username'] ?? '';
 
         if ($group_name === '') {
             bb_die($lang['NO_GROUP_NAME']);
diff --git a/admin/admin_ranks.php b/admin/admin_ranks.php
index 346677fc9..46d1d13cd 100644
--- a/admin/admin_ranks.php
+++ b/admin/admin_ranks.php
@@ -15,7 +15,7 @@ if (!empty($setmodules)) {
 require __DIR__ . '/pagestart.php';
 
 if (isset($_GET['mode']) || isset($_POST['mode'])) {
-    $mode = isset($_GET['mode']) ? $_GET['mode'] : $_POST['mode'];
+    $mode = $_GET['mode'] ?? $_POST['mode'];
 } else {
     //
     // These could be entered via a form button
diff --git a/admin/admin_sitemap.php b/admin/admin_sitemap.php
index 6bd142f67..0fe43458a 100644
--- a/admin/admin_sitemap.php
+++ b/admin/admin_sitemap.php
@@ -24,7 +24,7 @@ if (!$result = DB()->sql_query($sql)) {
         $config_name = $row['config_name'];
         $config_value = $row['config_value'];
         $default_config[$config_name] = $config_value;
-        $new[$config_name] = isset($_POST[$config_name]) ? $_POST[$config_name] : $default_config[$config_name];
+        $new[$config_name] = $_POST[$config_name] ?? $default_config[$config_name];
 
         if (isset($_POST['submit']) && $row['config_value'] != $new[$config_name]) {
             $new_params[$config_name] = $new[$config_name];
diff --git a/admin/admin_smilies.php b/admin/admin_smilies.php
index 1c4254689..856655200 100644
--- a/admin/admin_smilies.php
+++ b/admin/admin_smilies.php
@@ -16,7 +16,7 @@ require __DIR__ . '/pagestart.php';
 
 // Check to see what mode we should operate in
 if (isset($_POST['mode']) || isset($_GET['mode'])) {
-    $mode = isset($_POST['mode']) ? $_POST['mode'] : $_GET['mode'];
+    $mode = $_POST['mode'] ?? $_GET['mode'];
     $mode = htmlspecialchars($mode);
 } else {
     $mode = '';
@@ -255,10 +255,10 @@ if (isset($_GET['import_pack']) || isset($_POST['import_pack'])) {
             break;
 
         case 'savenew':
-            $smile_code = isset($_POST['smile_code']) ? $_POST['smile_code'] : $_GET['smile_code'];
-            $smile_url = isset($_POST['smile_url']) ? $_POST['smile_url'] : $_GET['smile_url'];
+            $smile_code = $_POST['smile_code'] ?? $_GET['smile_code'];
+            $smile_url = $_POST['smile_url'] ?? $_GET['smile_url'];
             $smile_url = bb_ltrim(basename($smile_url), "'");
-            $smile_emotion = isset($_POST['smile_emotion']) ? $_POST['smile_emotion'] : $_GET['smile_emotion'];
+            $smile_emotion = $_POST['smile_emotion'] ?? $_GET['smile_emotion'];
             $smile_code = trim($smile_code);
             $smile_url = trim($smile_url);
             $smile_emotion = trim($smile_emotion);
diff --git a/bt/announce.php b/bt/announce.php
index 9c3a49a23..2998e560f 100644
--- a/bt/announce.php
+++ b/bt/announce.php
@@ -71,7 +71,7 @@ foreach ($input_vars_num as $var_name) {
     $$var_name = isset($_GET[$var_name]) ? (float)$_GET[$var_name] : null;
 }
 // Passkey
-$passkey = isset($$passkey_key) ? $$passkey_key : null;
+$passkey = $$passkey_key ?? null;
 
 // Verify request
 // Required params (info_hash, peer_id, port, uploaded, downloaded, left, passkey)
diff --git a/dl.php b/dl.php
index 6dfec78b2..2ad3914c0 100644
--- a/dl.php
+++ b/dl.php
@@ -185,7 +185,7 @@ if ($download_mode == PHYSICAL_LINK) {
     if (IS_GUEST && !bb_captcha('check')) {
         global $template;
 
-        $redirect_url = isset($_POST['redirect_url']) ? $_POST['redirect_url'] : (isset($_SERVER['HTTP_REFERER']) ? $_SERVER['HTTP_REFERER'] : '/');
+        $redirect_url = $_POST['redirect_url'] ?? isset($_SERVER['HTTP_REFERER']) ? $_SERVER['HTTP_REFERER'] : '/';
         $message = '<form action="' . DOWNLOAD_URL . $attachment['attach_id'] . '" method="post">';
         $message .= $lang['CAPTCHA'] . ':';
         $message .= '<div  class="mrg_10" align="center">' . bb_captcha('get') . '</div>';
diff --git a/feed.php b/feed.php
index dd12cd095..ae6cac314 100644
--- a/feed.php
+++ b/feed.php
@@ -13,9 +13,9 @@ require __DIR__ . '/common.php';
 
 $user->session_start(array('req_login' => true));
 
-$mode = isset($_REQUEST['mode']) ? $_REQUEST['mode'] : '';
-$type = isset($_POST['type']) ? $_POST['type'] : '';
-$id = isset($_POST['id']) ? $_POST['id'] : 0;
+$mode = $_REQUEST['mode'] ?? '';
+$type = $_POST['type'] ?? '';
+$id = $_POST['id'] ?? 0;
 $timecheck = TIMENOW - 600;
 
 if (!$mode) {
diff --git a/index.php b/index.php
index f0f695021..b737b60b2 100644
--- a/index.php
+++ b/index.php
@@ -238,7 +238,7 @@ foreach ($cat_forums as $cid => $c) {
             'FORUM_DESC' => $f['forum_desc'],
             'POSTS' => commify($f['forum_posts']),
             'TOPICS' => commify($f['forum_topics']),
-            'LAST_SF_ID' => isset($f['last_sf_id']) ? $f['last_sf_id'] : null,
+            'LAST_SF_ID' => $f['last_sf_id'] ?? null,
             'MODERATORS' => isset($moderators[$fid]) ? implode(', ', $moderators[$fid]) : '',
             'FORUM_FOLDER_ALT' => ($new) ? $lang['NEW'] : $lang['OLD'],
         ));
diff --git a/library/attach_mod/displaying_torrent.php b/library/attach_mod/displaying_torrent.php
index 58b907d80..d14b1ee84 100644
--- a/library/attach_mod/displaying_torrent.php
+++ b/library/attach_mod/displaying_torrent.php
@@ -40,7 +40,7 @@ $template->assign_vars(array(
 
 // Define show peers mode (count only || user names with complete % || full details)
 $cfg_sp_mode = $bb_cfg['bt_show_peers_mode'];
-$get_sp_mode = (isset($_GET['spmode'])) ? $_GET['spmode'] : '';
+$get_sp_mode = $_GET['spmode'] ?? '';
 
 $s_mode = 'count';
 
@@ -167,7 +167,7 @@ if ($tor_reged && $tor_info) {
 
     $bt_userdata = DB()->fetch_row($sql);
 
-    $user_status = isset($bt_userdata['user_status']) ? $bt_userdata['user_status'] : null;
+    $user_status = $bt_userdata['user_status'] ?? null;
 
     if (($min_ratio_dl || $min_ratio_warn) && $user_status != DL_STATUS_COMPLETE && $bt_user_id != $poster_id && $tor_type != TOR_TYPE_GOLD) {
         if (($user_ratio = get_bt_ratio($bt_userdata)) !== null) {
diff --git a/library/includes/functions.php b/library/includes/functions.php
index 21b5f5f2d..ae6c9b13b 100644
--- a/library/includes/functions.php
+++ b/library/includes/functions.php
@@ -14,21 +14,21 @@ if (!defined('BB_ROOT')) {
 function get_path_from_id($id, $ext_id, $base_path, $first_div, $sec_div)
 {
     global $bb_cfg;
-    $ext = isset($bb_cfg['file_id_ext'][$ext_id]) ? $bb_cfg['file_id_ext'][$ext_id] : '';
+    $ext = $bb_cfg['file_id_ext'][$ext_id] ?? '';
     return ($base_path ? "$base_path/" : '') . floor($id / $first_div) . '/' . ($id % $sec_div) . '/' . $id . ($ext ? ".$ext" : '');
 }
 
 function get_avatar_path($id, $ext_id, $base_path = null, $first_div = 10000, $sec_div = 100)
 {
     global $bb_cfg;
-    $base_path = isset($base_path) ? $base_path : $bb_cfg['avatars']['upload_path'];
+    $base_path = $base_path ?? $bb_cfg['avatars']['upload_path'];
     return get_path_from_id($id, $ext_id, $base_path, $first_div, $sec_div);
 }
 
 function get_attach_path($id, $ext_id = '', $base_path = null, $first_div = 10000, $sec_div = 100)
 {
     global $bb_cfg;
-    $base_path = isset($base_path) ? $base_path : $bb_cfg['attach']['upload_path'];
+    $base_path = $base_path ?? $bb_cfg['attach']['upload_path'];
     return get_path_from_id($id, $ext_id, $base_path, $first_div, $sec_div);
 }
 
@@ -104,8 +104,8 @@ function get_last_read($topic_id = 0, $forum_id = 0)
 {
     global $tracking_topics, $tracking_forums, $user;
 
-    $t = isset($tracking_topics[$topic_id]) ? $tracking_topics[$topic_id] : 0;
-    $f = isset($tracking_forums[$forum_id]) ? $tracking_forums[$forum_id] : 0;
+    $t = $tracking_topics[$topic_id] ?? 0;
+    $f = $tracking_forums[$forum_id] ?? 0;
     return max($t, $f, $user->data['user_lastvisit']);
 }
 
@@ -678,7 +678,7 @@ function request_var($var_name, $default, $multibyte = false, $cookie = false)
         if (!isset($_GET[$var_name]) && !isset($_POST[$var_name])) {
             return (is_array($default)) ? array() : $default;
         }
-        $_REQUEST[$var_name] = isset($_POST[$var_name]) ? $_POST[$var_name] : $_GET[$var_name];
+        $_REQUEST[$var_name] = $_POST[$var_name] ?? $_GET[$var_name];
     }
 
     if (!isset($_REQUEST[$var_name]) || (is_array($_REQUEST[$var_name]) && !is_array($default)) || (is_array($default) && !is_array($_REQUEST[$var_name]))) {
@@ -1386,7 +1386,7 @@ function bb_realpath($path)
 
 function login_redirect($url = '')
 {
-    redirect(LOGIN_URL . '?redirect=' . (($url) ?: (isset($_SERVER['REQUEST_URI']) ? $_SERVER['REQUEST_URI'] : '/')));
+    redirect(LOGIN_URL . '?redirect=' . (($url) ?: ($_SERVER['REQUEST_URI'] ?? '/')));
 }
 
 function meta_refresh($url, $time = 5)
@@ -1455,7 +1455,7 @@ function get_forum_display_sort_option($selected_row = 0, $action = 'list', $lis
     if ($action == 'list') {
         for ($i = 0, $iMax = count($listrow['lang_key']); $i < $iMax; $i++) {
             $selected = ($i == $selected_row) ? ' selected="selected"' : '';
-            $l_value = (isset($lang[$listrow['lang_key'][$i]])) ? $lang[$listrow['lang_key'][$i]] : $listrow['lang_key'][$i];
+            $l_value = $lang[$listrow['lang_key'][$i]] ?? $listrow['lang_key'][$i];
             $res .= '<option value="' . $i . '"' . $selected . '>' . $l_value . '</option>';
         }
     } else {
@@ -1612,7 +1612,7 @@ function get_topic_icon($topic, $is_unread = null)
     global $bb_cfg, $images;
 
     $t_hot = ($topic['topic_replies'] >= $bb_cfg['hot_threshold']);
-    $is_unread = null === $is_unread ? is_unread($topic['topic_last_post_time'], $topic['topic_id'], $topic['forum_id']) : $is_unread;
+    $is_unread = $is_unread ?? is_unread($topic['topic_last_post_time'], $topic['topic_id'], $topic['forum_id']);
 
     if ($topic['topic_status'] == TOPIC_MOVED) {
         $folder_image = $images['folder'];
diff --git a/login.php b/login.php
index 381179f18..a55420470 100644
--- a/login.php
+++ b/login.php
@@ -37,7 +37,7 @@ if (preg_match('/^redirect=([a-z0-9\.#\/\?&=\+\-_]+)/si', $_SERVER['QUERY_STRING
 } elseif (!empty($_POST['redirect'])) {
     $redirect_url = str_replace('&amp;', '&', htmlspecialchars($_POST['redirect']));
 } elseif (!empty($_SERVER['HTTP_REFERER']) && ($parts = @parse_url($_SERVER['HTTP_REFERER']))) {
-    $redirect_url = (isset($parts['path']) ? $parts['path'] : "index.php") . (isset($parts['query']) ? '?' . $parts['query'] : '');
+    $redirect_url = ($parts['path'] ?? "index.php") . (isset($parts['query']) ? '?' . $parts['query'] : '');
 }
 
 $redirect_url = str_replace('&admin=1', '', $redirect_url);
@@ -56,8 +56,8 @@ if (isset($_REQUEST['admin']) && !IS_AM) {
 $mod_admin_login = (IS_AM && !$user->data['session_admin']);
 
 // login username & password
-$login_username = ($mod_admin_login) ? $userdata['username'] : (isset($_POST['login_username']) ? $_POST['login_username'] : '');
-$login_password = isset($_POST['login_password']) ? $_POST['login_password'] : '';
+$login_username = ($mod_admin_login) ? $userdata['username'] : ($_POST['login_username'] ?? '');
+$login_password = $_POST['login_password'] ?? '';
 
 // Проверка на неверную комбинацию логин/пароль
 $need_captcha = false;
diff --git a/modcp.php b/modcp.php
index ef8fb464a..6dca314df 100644
--- a/modcp.php
+++ b/modcp.php
@@ -70,9 +70,9 @@ function validate_mode_condition($request_index, $mod_action = '')
 }
 
 // Obtain initial vars
-$forum_id = isset($_REQUEST['f']) ? $_REQUEST['f'] : 0;
-$topic_id = isset($_REQUEST['t']) ? $_REQUEST['t'] : 0;
-$post_id = isset($_REQUEST['p']) ? $_REQUEST['p'] : 0;
+$forum_id = $_REQUEST['f'] ?? 0;
+$topic_id = $_REQUEST['t'] ?? 0;
+$post_id = $_REQUEST['p'] ?? 0;
 
 $start = isset($_REQUEST['start']) ? abs((int)$_REQUEST['start']) : 0;
 $confirmed = isset($_POST['confirm']);
@@ -166,7 +166,7 @@ if (!$is_auth['auth_mod']) {
 
 // Redirect to login page if not admin session
 if ($is_moderator && !$userdata['session_admin']) {
-    $redirect = isset($_POST['redirect']) ? $_POST['redirect'] : $_SERVER['REQUEST_URI'];
+    $redirect = $_POST['redirect'] ?? $_SERVER['REQUEST_URI'];
     redirect(LOGIN_URL . "?redirect=$redirect&admin=1");
 }
 
@@ -189,7 +189,7 @@ switch ($mode) {
             bb_die($lang['NONE_SELECTED']);
         }
 
-        $req_topics = isset($_POST['topic_id_list']) ? $_POST['topic_id_list'] : $topic_id;
+        $req_topics = $_POST['topic_id_list'] ?? $topic_id;
         validate_topics($forum_id, $req_topics, $topic_titles);
 
         if (!$req_topics || !($topic_csv = get_id_csv($req_topics))) {
@@ -370,10 +370,10 @@ switch ($mode) {
         //mpd
         $delete_posts = isset($_POST['delete_posts']);
         $split = (isset($_POST['split_type_all']) || isset($_POST['split_type_beyond']));
-        $posts = (isset($_POST['post_id_list'])) ? $_POST['post_id_list'] : array();
+        $posts = $_POST['post_id_list'] ?? array();
         $start = /* (isset($_POST['start'])) ? intval($_POST['start']) : */
             0;
-        $topic_first_post_id = (isset($topic_row['topic_first_post_id'])) ? $topic_row['topic_first_post_id'] : '';
+        $topic_first_post_id = $topic_row['topic_first_post_id'] ?? '';
 
         $post_id_sql = $req_post_id_sql = array();
 
diff --git a/posting.php b/posting.php
index 82dffdeca..425176bd2 100644
--- a/posting.php
+++ b/posting.php
@@ -527,7 +527,7 @@ if ($mode == 'newtopic' || ($mode == 'editpost' && $post_data['first_post'])) {
     }
 }
 //bt
-$topic_dl_type = (isset($post_info['topic_dl_type'])) ? $post_info['topic_dl_type'] : 0;
+$topic_dl_type = $post_info['topic_dl_type'] ?? 0;
 
 if ($post_info['allow_reg_tracker'] && $post_data['first_post'] && ($topic_dl_type || $is_auth['auth_mod'])) {
     $sql = "
diff --git a/search.php b/search.php
index e7d6ca541..a80fd6a8b 100644
--- a/search.php
+++ b/search.php
@@ -70,7 +70,7 @@ $tracking_forums = get_tracks('forum');
 if ($mode =& $_REQUEST['mode']) {
     // This handles the simple windowed user search functions called from various other scripts
     if ($mode == 'searchuser') {
-        $username = isset($_POST['search_username']) ? $_POST['search_username'] : '';
+        $username = $_POST['search_username'] ?? '';
         username_search($username);
         exit;
     }
diff --git a/src/Legacy/Admin/Torrent.php b/src/Legacy/Admin/Torrent.php
index 13e21d3be..e5019558a 100644
--- a/src/Legacy/Admin/Torrent.php
+++ b/src/Legacy/Admin/Torrent.php
@@ -105,9 +105,9 @@ class Torrent
 
         foreach ($default_cfg as $config_name => $config_value) {
             $template->assign_vars(array(
-                'L_' . strtoupper($config_name) => isset($lang[$config_name]) ? $lang[$config_name] : '',
-                'L_' . strtoupper($config_name) . '_EXPL' => isset($lang[$config_name . '_expl']) ? $lang[$config_name . '_expl'] : '',
-                'L_' . strtoupper($config_name) . '_HEAD' => isset($lang[$config_name . '_head']) ? $lang[$config_name . '_head'] : '',
+                'L_' . strtoupper($config_name) => $lang[$config_name] ?? '',
+                'L_' . strtoupper($config_name) . '_EXPL' => $lang[$config_name . '_expl'] ?? '',
+                'L_' . strtoupper($config_name) . '_HEAD' => $lang[$config_name . '_head'] ?? '',
             ));
         }
     }
diff --git a/src/Legacy/Cache/Sqlite.php b/src/Legacy/Cache/Sqlite.php
index 678199604..a2e38d917 100644
--- a/src/Legacy/Cache/Sqlite.php
+++ b/src/Legacy/Cache/Sqlite.php
@@ -79,7 +79,7 @@ class Sqlite extends Common
         if (is_array($this->prefix . $name)) {
             return $cached_items;
         } else {
-            return isset($cached_items[$name]) ? $cached_items[$name] : false;
+            return $cached_items[$name] ?? false;
         }
     }
 
diff --git a/src/Legacy/Common/User.php b/src/Legacy/Common/User.php
index 24a349008..81dc65d33 100644
--- a/src/Legacy/Common/User.php
+++ b/src/Legacy/Common/User.php
@@ -590,8 +590,7 @@ class User
         /** Place user language to the global */
         global $lang;
         require(LANG_DIR . 'main.php');
-        setlocale(LC_ALL, isset($bb_cfg['lang'][$this->data['user_lang']]['locale']) ?
-            $bb_cfg['lang'][$this->data['user_lang']]['locale'] : 'en_US.UTF-8');
+        setlocale(LC_ALL, $bb_cfg['lang'][$this->data['user_lang']]['locale'] ?? 'en_US.UTF-8');
         $lang += $source_lang;
 
         $theme = setup_style();
diff --git a/src/Legacy/SqlDb.php b/src/Legacy/SqlDb.php
index 4ec9baf4c..cca3af01d 100644
--- a/src/Legacy/SqlDb.php
+++ b/src/Legacy/SqlDb.php
@@ -258,7 +258,7 @@ class SqlDb
         $row = mysqli_fetch_assoc($result);
 
         if ($field_name) {
-            return isset($row[$field_name]) ? $row[$field_name] : false;
+            return $row[$field_name] ?? false;
         }
 
         return $row;
diff --git a/src/Legacy/Template.php b/src/Legacy/Template.php
index 415112810..51ec50111 100644
--- a/src/Legacy/Template.php
+++ b/src/Legacy/Template.php
@@ -983,13 +983,13 @@ class Template
 
         // adding language variable (eg: "english" or "german")
         // can be used to make truly multi-lingual templates
-        $this->vars['LANG'] = isset($this->vars['LANG']) ? $this->vars['LANG'] : $bb_cfg['default_lang'];
+        $this->vars['LANG'] = $this->vars['LANG'] ?? $bb_cfg['default_lang'];
         // adding current template
         $tpl = $this->root . '/';
         if (substr($tpl, 0, 2) === './') {
             $tpl = substr($tpl, 2, strlen($tpl));
         }
-        $this->vars['TEMPLATE'] = isset($this->vars['TEMPLATE']) ? $this->vars['TEMPLATE'] : $tpl;
-        $this->vars['TEMPLATE_NAME'] = isset($this->vars['TEMPLATE_NAME']) ? $this->vars['TEMPLATE_NAME'] : $this->tpl;
+        $this->vars['TEMPLATE'] = $this->vars['TEMPLATE'] ?? $tpl;
+        $this->vars['TEMPLATE_NAME'] = $this->vars['TEMPLATE_NAME'] ?? $this->tpl;
     }
 }
diff --git a/styles/templates/default/tpl_config.php b/styles/templates/default/tpl_config.php
index 0dec63425..c57eafe00 100644
--- a/styles/templates/default/tpl_config.php
+++ b/styles/templates/default/tpl_config.php
@@ -10,7 +10,7 @@
 global $bb_cfg, $page_cfg, $template, $images, $lang;
 
 $width = $height = array();
-$template_name = basename(dirname(__FILE__));
+$template_name = basename(__DIR__);
 
 $_img = BB_ROOT . 'styles/images/';
 $_main = BB_ROOT . 'styles/' . basename(TEMPLATES_DIR) . '/' . $template_name . '/images/';
diff --git a/tracker.php b/tracker.php
index 5752c6b57..808972542 100644
--- a/tracker.php
+++ b/tracker.php
@@ -690,8 +690,8 @@ if ($allowed_forums) {
         $passkey = DB()->fetch_row("SELECT auth_key FROM " . BB_BT_USERS . " WHERE user_id = " . (int)$user_id . " LIMIT 1");
         // Build torrents table
         foreach (DB()->fetch_rowset($sql) as $tor) {
-            $dl = isset($tor['speed_down']) ? $tor['speed_down'] : 0;
-            $ul = isset($tor['speed_up']) ? $tor['speed_up'] : 0;
+            $dl = $tor['speed_down'] ?? 0;
+            $ul = $tor['speed_up'] ?? 0;
 
             $seeds = $tor['seeders'];
             $leechs = $tor['leechers'];
diff --git a/viewforum.php b/viewforum.php
index e5c4598de..8234e82dc 100644
--- a/viewforum.php
+++ b/viewforum.php
@@ -82,7 +82,7 @@ $mod_redirect_url = '';
 $tor_status = -1;  //  all by default
 
 if ($is_auth['auth_mod']) {
-    $redirect = isset($_POST['redirect']) ? $_POST['redirect'] : $_SERVER['REQUEST_URI'];
+    $redirect = $_POST['redirect'] ?? $_SERVER['REQUEST_URI'];
     $redirect = url_arg($redirect, 'mod', 1, '&');
     $mod_redirect_url = LOGIN_URL . "?redirect=$redirect&admin=1";
 
@@ -456,7 +456,7 @@ foreach ($topic_rowset as $topic) {
         'TOR_STATUS_ICON' => isset($topic['tor_status']) ? $bb_cfg['tor_icons'][$topic['tor_status']] : '',
         'TOR_STATUS_TEXT' => isset($topic['tor_status']) ? $lang['TOR_STATUS_NAME'][$topic['tor_status']] : '',
 
-        'ATTACH' => isset($topic['topic_attachment']) ? $topic['topic_attachment'] : false,
+        'ATTACH' => $topic['topic_attachment'] ?? false,
         'STATUS' => $topic['topic_status'],
         'TYPE' => $topic['topic_type'],
         'DL' => ($topic['topic_dl_type'] == TOPIC_DL_TYPE_DL && !$forum_data['allow_reg_tracker']),
diff --git a/viewtopic.php b/viewtopic.php
index c9eba8d1b..7ac4df45d 100644
--- a/viewtopic.php
+++ b/viewtopic.php
@@ -182,7 +182,7 @@ $moderation = (!empty($_REQUEST['mod']) && $is_auth['auth_mod']);
 $mod_redirect_url = '';
 
 if ($is_auth['auth_mod']) {
-    $redirect = isset($_POST['redirect']) ? $_POST['redirect'] : @$_SERVER['REQUEST_URI'];
+    $redirect = $_POST['redirect'] ?? @$_SERVER['REQUEST_URI'];
     $redirect = url_arg($redirect, 'mod', 1, '&');
     $mod_redirect_url = LOGIN_URL . "?redirect=$redirect&admin=1";
 
@@ -798,7 +798,7 @@ foreach ($is_auth as $name => $is) {
 }
 
 $template->assign_vars(array(
-    'PG_ROW_CLASS' => isset($pg_row_class) ? $pg_row_class : 'row1',
+    'PG_ROW_CLASS' => $pg_row_class ?? 'row1',
 ));
 
 if (IS_ADMIN) {