diff --git a/common.php b/common.php
index 9dd51601b..81d9debbf 100644
--- a/common.php
+++ b/common.php
@@ -257,7 +257,7 @@ function file_write ($str, $file, $max_size = LOG_MAX_SIZE, $lock = true, $repla
 {
 	$bytes_written = false;
 
-	if ($max_size && filesize($file) >= $max_size)
+	if (file_exists($file) && $max_size && filesize($file) >= $max_size)
 	{
 		$old_name = $file; $ext = '';
 		if (preg_match('#^(.+)(\.[^\\/]+)$#', $file, $matches))
diff --git a/library/includes/cron/cron_init.php b/library/includes/cron/cron_init.php
index 227b31260..8c7398796 100644
--- a/library/includes/cron/cron_init.php
+++ b/library/includes/cron/cron_init.php
@@ -30,7 +30,7 @@ function cron_get_file_lock ()
 
 function cron_track_running ($mode)
 {
-	define('CRON_STARTMARK', TRIGGERS_DIR .'cron_started_at_'. date('Y-m-d_H-i-s') .'_by_pid_'. getmypid());
+    defined('CRON_STARTMARK') or define('CRON_STARTMARK', TRIGGERS_DIR .'cron_started_at_'. date('Y-m-d_H-i-s') .'_by_pid_'. getmypid());
 
 	if ($mode == 'start')
 	{
diff --git a/library/includes/functions.php b/library/includes/functions.php
index b269e926b..e03e4d8bc 100644
--- a/library/includes/functions.php
+++ b/library/includes/functions.php
@@ -2029,7 +2029,7 @@ function get_topic_icon ($topic, $is_unread = null)
 			$folder = $images['folder_locked'];
 			$folder_new = $images['folder_locked_new'];
 		}
-		else if ($topic['tracker_status'])
+		else if (isset($topic['tracker_status']))
 		{
 			$folder = ($t_hot) ? $images['folder_dl_hot'] : $images['folder_dl'];
 			$folder_new = ($t_hot) ? $images['folder_dl_hot_new'] : $images['folder_dl_new'];
diff --git a/library/includes/init_bb.php b/library/includes/init_bb.php
index e7c5d2cef..dc1521927 100644
--- a/library/includes/init_bb.php
+++ b/library/includes/init_bb.php
@@ -496,10 +496,14 @@ function cron_touch_lock_file ($lock_file)
 
 function cron_enable_board ()
 {
-	rename(BB_DISABLED, BB_ENABLED);
+    if (file_exists(BB_DISABLED)) {
+        rename(BB_DISABLED, BB_ENABLED);
+    }
 }
 
 function cron_disable_board ()
 {
-	rename(BB_ENABLED, BB_DISABLED);
+    if (file_exists(BB_ENABLED)) {
+        rename(BB_ENABLED, BB_DISABLED);
+    }
 }
\ No newline at end of file
diff --git a/library/includes/torrent_show_dl_list.php b/library/includes/torrent_show_dl_list.php
index c17946adf..458172e01 100644
--- a/library/includes/torrent_show_dl_list.php
+++ b/library/includes/torrent_show_dl_list.php
@@ -2,6 +2,9 @@
 
 if (!defined('BB_ROOT')) die(basename(__FILE__));
 
+/** @var \TorrentPier\Di $di */
+$di = \TorrentPier\Di::getInstance();
+
 $show_canceled_in_count_mode  = false;
 $title_date_format            = 'Y-m-d';
 $dl_list_sql_limit            = 300;     // DL-List overall limit
@@ -12,15 +15,15 @@ $dl_users_div_style_overflow  = "padding: 6px; height: $dl_users_overflow_div_he
 
 $template->assign_vars(array('DL_BUTTONS' => false));
 
-$count_mode = ($bb_cfg['bt_dl_list_only_count'] && !($_GET['dl'] === 'names'));
+$count_mode = ($bb_cfg['bt_dl_list_only_count'] && !($di->request->get('dl') === 'names'));
 
-$dl_topic = ($t_data['tracker_status'] && !($bb_cfg['bt_dl_list_only_1st_page'] && $start));
-$show_dl_list = ($dl_topic && ($bb_cfg['bt_show_dl_list'] || ($bb_cfg['allow_dl_list_names_mode'] && $_GET['dl'] === 'names')));
+$dl_topic = (isset($t_data['tracker_status']) && !($bb_cfg['bt_dl_list_only_1st_page'] && $start));
+$show_dl_list = ($dl_topic && ($bb_cfg['bt_show_dl_list'] || ($bb_cfg['allow_dl_list_names_mode'] && $di->request->get('dl') === 'names')));
 $show_dl_buttons = ($dl_topic && $bb_cfg['bt_show_dl_list_buttons']);
 
 // link to clear DL-List
 $template->assign_vars(array('S_DL_DELETE' => false));
-if ($is_auth['auth_mod'] && $t_data['tracker_status'])
+if ($is_auth['auth_mod'] && isset($t_data['tracker_status']))
 {
 	$s_dl_delete = "<a href=\"dl_list.php?mode=dl_delete&amp;". POST_TOPIC_URL ."=$topic_id&amp;sid=". $userdata['session_id'] .'">'. $lang['DL_LIST_DEL'] .'</a>';
 	$template->assign_vars(array('S_DL_DELETE' => $s_dl_delete));
diff --git a/library/language/en/main.php b/library/language/en/main.php
index 26b16fe69..7b0473e61 100644
--- a/library/language/en/main.php
+++ b/library/language/en/main.php
@@ -2333,8 +2333,8 @@ $lang['BOARD_DISABLE_EXPL'] = 'disable board when this job is run';
 $lang['RUN_COUNTER'] = 'Run counter';
 
 $lang['JOB_REMOVED'] = 'The problem has been removed successfully';
-$lang['SCRIPT_DUPLICATE'] = 'Script <b>'. $_POST['cron_script'] .'</b> already exists!';
-$lang['TITLE_DUPLICATE'] = 'Task Name <b>'. $_POST['cron_title'] .'</b> already exists!';
+$lang['SCRIPT_DUPLICATE'] = 'Script <b> $_POST["cron_script"] </b> already exists!';
+$lang['TITLE_DUPLICATE'] = 'Task Name <b> $_POST["cron_title"] </b> already exists!';
 $lang['CLICK_RETURN_JOBS_ADDED'] = '%sReturn to the addition problem%s';
 $lang['CLICK_RETURN_JOBS'] = '%sBack to the Task Scheduler%s';
 
diff --git a/library/language/ru/main.php b/library/language/ru/main.php
index c670fdcfd..088576a38 100644
--- a/library/language/ru/main.php
+++ b/library/language/ru/main.php
@@ -2333,8 +2333,8 @@ $lang['BOARD_DISABLE_EXPL'] = 'отключать форум, когда зад
 $lang['RUN_COUNTER'] = 'Кол-во запусков';
 
 $lang['JOB_REMOVED'] = 'Задача была успешно удалена';
-$lang['SCRIPT_DUPLICATE'] = 'Скрипт <b>'. $_POST['cron_script'] .'</b> уже существует!';
-$lang['TITLE_DUPLICATE'] = 'Название задачи <b>'. $_POST['cron_title'] .'</b> уже существует!';
+$lang['SCRIPT_DUPLICATE'] = 'Скрипт <b> $_POST["cron_script"] </b> уже существует!';
+$lang['TITLE_DUPLICATE'] = 'Название задачи <b> $_POST["cron_title"] </b> уже существует!';
 $lang['CLICK_RETURN_JOBS_ADDED'] = '%sВернуться к добавлению задачи%s';
 $lang['CLICK_RETURN_JOBS'] = '%sВернуться к планировщику задач%s';
 
diff --git a/library/language/uk/main.php b/library/language/uk/main.php
index 77ee1547a..926224fae 100644
--- a/library/language/uk/main.php
+++ b/library/language/uk/main.php
@@ -2333,8 +2333,8 @@ $lang['BOARD_DISABLE_EXPL'] = 'відключати форум, коли зав
 $lang['RUN_COUNTER'] = 'Кількість запусків';
 
 $lang['JOB_REMOVED'] = 'Завдання було успішно видалено';
-$lang['SCRIPT_DUPLICATE'] = 'Скрипт <b>'. $_POST['cron_script'] .'</b> вже існує!';
-$lang['TITLE_DUPLICATE'] = 'Назва завдання <b>'. $_POST['cron_title'] .'</b> вже існує!';
+$lang['SCRIPT_DUPLICATE'] = 'Скрипт <b> $_POST["cron_script"] </b> вже існує!';
+$lang['TITLE_DUPLICATE'] = 'Назва завдання <b> $_POST["cron_title"] </b> вже існує!';
 $lang['CLICK_RETURN_JOBS_ADDED'] = '%sПовернутися до додавання задачі%s';
 $lang['CLICK_RETURN_JOBS'] = '%sПовернутися до планувальника завдань%s';
 
diff --git a/posting.php b/posting.php
index e947e779d..0c9b80dbf 100644
--- a/posting.php
+++ b/posting.php
@@ -3,6 +3,10 @@
 define('BB_SCRIPT', 'posting');
 define('BB_ROOT', './');
 require(BB_ROOT ."common.php");
+
+/** @var \TorrentPier\Di $di */
+$di = \TorrentPier\Di::getInstance();
+
 require(INC_DIR .'bbcode.php');
 require(INC_DIR .'functions_post.php');
 
@@ -11,13 +15,13 @@ $user->session_start();
 
 $page_cfg['load_tpl_vars'] = ['post_icons'];
 
-$submit   = (bool) $_REQUEST['post'];
-$preview  = (bool) $_REQUEST['preview'];
-$delete   = (bool) $_REQUEST['delete'];
+$submit   = $di->request->request->has('post');
+$preview  = $di->request->request->has('preview');
+$delete   = $di->request->request->has('delete');
 
-$forum_id = (int) $_REQUEST[POST_FORUM_URL];
-$topic_id = (int) $_REQUEST[POST_TOPIC_URL];
-$post_id  = (int) $_REQUEST[POST_POST_URL];
+$forum_id = $di->request->request->getInt(POST_FORUM_URL);
+$topic_id = $di->request->request->getInt(POST_TOPIC_URL);
+$post_id  = $di->request->request->getInt(POST_POST_URL);
 
 $mode = (string) $_REQUEST['mode'];
 
@@ -26,7 +30,7 @@ $confirm = isset($_POST['confirm']);
 $orig_word = $replacement_word = [];
 
 // Set topic type
-$topic_type = ($_POST['topictype']) ? (int) $_POST['topictype'] : POST_NORMAL;
+$topic_type = $di->request->request->getInt('topictype', POST_NORMAL);
 $topic_type = in_array($topic_type, [POST_NORMAL, POST_STICKY, POST_ANNOUNCE]) ? $topic_type : POST_NORMAL;
 
 $selected_rg = $switch_rg_sig = $switch_poster_rg_sig = 0;
diff --git a/search.php b/search.php
index 3278b2ea4..389052a9f 100644
--- a/search.php
+++ b/search.php
@@ -819,7 +819,7 @@ else
 			'ATTACH'        => $topic['attach_ext_id'],
 			'STATUS'        => $topic['topic_status'],
 			'TYPE'          => $topic['topic_type'],
-			'DL'            => $topic['tracker_status'],
+			'DL'            => isset($topic['tracker_status']) ? $topic['tracker_status'] : null,
 			'POLL'          => $topic['topic_vote'],
 			'DL_CLASS'      => isset($topic['dl_status']) ? $dl_link_css[$topic['dl_status']] : '',
 
diff --git a/styleguide.php b/styleguide.php
index 951a010a2..7bcb54184 100644
--- a/styleguide.php
+++ b/styleguide.php
@@ -9,6 +9,11 @@ $di = \TorrentPier\Di::getInstance();
 /** @var \TorrentPier\Db\Adapter $db */
 $db = $di->db;
 
+///** @var \Symfony\Component\HttpFoundation\Request $request */
+//$request = $di->request;
+//$request->request->has()
+
+
 //$id = $db->insert(BB_USERS, [
 //    'username' => 'user_' . rand(1, 50)
 //]);
diff --git a/viewforum.php b/viewforum.php
index dbbd4775f..db4639720 100644
--- a/viewforum.php
+++ b/viewforum.php
@@ -4,6 +4,9 @@ define('BB_SCRIPT', 'forum');
 define('BB_ROOT', './');
 require(BB_ROOT . 'common.php');
 
+/** @var \TorrentPier\Di $di */
+$di = \TorrentPier\Di::getInstance();
+
 $page_cfg['include_bbcode_js'] = true;
 
 $show_last_topic     = true;
@@ -231,7 +234,8 @@ $select_tpp = '';
 
 if ($is_auth['auth_mod'])
 {
-	if ($req_tpp = abs(intval($_REQUEST['tpp'])) AND in_array($req_tpp, $bb_cfg['allowed_topics_per_page']))
+
+	if ($req_tpp = $di->request->query->getInt('tpp') AND in_array($req_tpp, $bb_cfg['allowed_topics_per_page']))
 	{
 		$topics_per_page = $req_tpp;
 	}
@@ -260,7 +264,7 @@ $sel_previous_days = array(
 
 if (!empty($_REQUEST['topicdays']))
 {
-	if ($req_topic_days = abs(intval($_REQUEST['topicdays'])) AND isset($sel_previous_days[$req_topic_days]))
+	if ($req_topic_days = $di->request->query->getInt('topicdays') AND isset($sel_previous_days[$req_topic_days]))
 	{
 		$sql = "
 			SELECT COUNT(*) AS forum_topics
@@ -485,7 +489,7 @@ foreach ($topic_rowset as $topic)
 		'ATTACH'           => $topic['attach_ext_id'],
 		'STATUS'           => $topic['topic_status'],
 		'TYPE'             => $topic['topic_type'],
-		'DL'               => ($topic['tracker_status'] && !$forum_data['allow_reg_tracker']),
+		'DL'               => (isset($topic['tracker_status']) && !$forum_data['allow_reg_tracker']),
 		'POLL'             => $topic['topic_vote'],
 		'DL_CLASS'         => isset($topic['dl_status']) ? $dl_link_css[$topic['dl_status']] : '',
 
diff --git a/viewtopic.php b/viewtopic.php
index de9f76963..a627011bf 100644
--- a/viewtopic.php
+++ b/viewtopic.php
@@ -3,6 +3,10 @@
 define('BB_SCRIPT', 'topic');
 define('BB_ROOT', './');
 require(BB_ROOT .'common.php');
+
+/** @var \TorrentPier\Di $di */
+$di = \TorrentPier\Di::getInstance();
+
 require(INC_DIR .'bbcode.php');
 
 $datastore->enqueue(array(
@@ -29,7 +33,7 @@ $select_ppp = '';
 
 if ($userdata['session_admin'])
 {
-	if ($req_ppp = abs(intval($_REQUEST['ppp'])) AND in_array($req_ppp, $bb_cfg['allowed_posts_per_page']))
+	if ($req_ppp = $di->request->query->getInt('ppp') AND in_array($req_ppp, $bb_cfg['allowed_posts_per_page']))
 	{
 		$posts_per_page = $req_ppp;
 	}