diff --git a/composer.json b/composer.json
index e5b73d9b..4bf9bcc2 100644
--- a/composer.json
+++ b/composer.json
@@ -34,6 +34,8 @@
             "inc/queue.php",
             "inc/functions.php",
             "inc/functions/net.php",
+            "inc/functions/num.php",
+            "inc/functions/format.php",
             "inc/driver/http-driver.php",
             "inc/driver/log-driver.php",
             "inc/service/captcha-queries.php"
diff --git a/inc/bans.php b/inc/bans.php
index 8ea3b921..126d38b8 100644
--- a/inc/bans.php
+++ b/inc/bans.php
@@ -1,5 +1,6 @@
 <?php
 
+use Vichan\Functions\Format;
 use Lifo\IP\CIDR;
 
 class Bans {
@@ -371,7 +372,7 @@ class Bans {
 		$query->execute() or error(db_error($query));
 		if (isset($mod['id']) && $mod['id'] == $mod_id) {
 			modLog('Created a new ' .
-				($length > 0 ? preg_replace('/^(\d+) (\w+?)s?$/', '$1-$2', until($length)) : 'permanent') .
+				($length > 0 ? preg_replace('/^(\d+) (\w+?)s?$/', '$1-$2', Format\until($length)) : 'permanent') .
 				' ban on ' .
 				($ban_board ? '/' . $ban_board . '/' : 'all boards') .
 				' for ' .
diff --git a/inc/functions.php b/inc/functions.php
index 71231203..1d98f9cf 100755
--- a/inc/functions.php
+++ b/inc/functions.php
@@ -21,9 +21,7 @@ loadConfig();
 
 function init_locale($locale, $error='error') {
 	if (extension_loaded('gettext')) {
-		if (setlocale(LC_ALL, $locale) === false) {
-			//$error('The specified locale (' . $locale . ') does not exist on your platform!');
-		}
+		setlocale(LC_ALL, $locale);
 		bindtextdomain('tinyboard', './inc/locale');
 		bind_textdomain_codeset('tinyboard', 'UTF-8');
 		textdomain('tinyboard');
@@ -55,8 +53,9 @@ function loadConfig() {
 
 
 	if (isset($config['cache_config']) &&
-	    $config['cache_config'] &&
-            $config = Cache::get('config_' . $boardsuffix ) ) {
+		$config['cache_config'] &&
+		$config = Cache::get('config_' . $boardsuffix))
+	{
 		$events = Cache::get('events_' . $boardsuffix );
 
 		define_groups();
@@ -66,11 +65,10 @@ function loadConfig() {
 		}
 
 		if ($config['locale'] != $current_locale) {
-                	$current_locale = $config['locale'];
-                	init_locale($config['locale'], $error);
-        	}
-	}
-	else {
+					$current_locale = $config['locale'];
+					init_locale($config['locale'], $error);
+			}
+	} else {
 		$config = array();
 
 		reset_events();
@@ -180,8 +178,8 @@ function loadConfig() {
 							'(' .
 								str_replace('%d', '\d+', preg_quote($config['file_page'], '/')) . '|' .
 								str_replace('%d', '\d+', preg_quote($config['file_page50'], '/')) . '|' .
-	                                                        str_replace(array('%d', '%s'), array('\d+', '[a-z0-9-]+'), preg_quote($config['file_page_slug'], '/')) . '|' .
-	                                                        str_replace(array('%d', '%s'), array('\d+', '[a-z0-9-]+'), preg_quote($config['file_page50_slug'], '/')) .
+								str_replace(array('%d', '%s'), array('\d+', '[a-z0-9-]+'), preg_quote($config['file_page_slug'], '/')) . '|' .
+								str_replace(array('%d', '%s'), array('\d+', '[a-z0-9-]+'), preg_quote($config['file_page50_slug'], '/')) .
 							')' .
 						'|' .
 							preg_quote($config['file_mod'], '/') . '\?\/.+' .
@@ -242,12 +240,13 @@ function loadConfig() {
 			$__version = file_exists('.installed') ? trim(file_get_contents('.installed')) : false;
 		$config['version'] = $__version;
 
-		if ($config['allow_roll'])
+		if ($config['allow_roll']) {
 			event_handler('post', 'diceRoller');
+		}
 
-		if (in_array('webm', $config['allowed_ext_files']) ||
-        	    in_array('mp4',  $config['allowed_ext_files']))
+		if (in_array('webm', $config['allowed_ext_files']) || in_array('mp4',  $config['allowed_ext_files'])) {
 			event_handler('post', 'postHandler');
+		}
 	}
 	// Effectful config processing below:
 
@@ -280,8 +279,7 @@ function loadConfig() {
 	if ($config['cache']['enabled'])
 		require_once 'inc/cache.php';
 
-	if (in_array('webm', $config['allowed_ext_files']) ||
-            in_array('mp4',  $config['allowed_ext_files']))
+	if (in_array('webm', $config['allowed_ext_files']) || in_array('mp4',  $config['allowed_ext_files']))
 		require_once 'inc/lib/webm/posthandler.php';
 
 	event('load-config');
@@ -517,12 +515,11 @@ function mb_substr_replace($string, $replacement, $start, $length) {
 function setupBoard($array) {
 	global $board, $config;
 
-	$board = array(
+	$board = [
 		'uri' => $array['uri'],
 		'title' => $array['title'],
 		'subtitle' => $array['subtitle'],
-		#'indexed' => $array['indexed'],
-	);
+	];
 
 	// older versions
 	$board['name'] = &$board['title'];
@@ -720,8 +717,8 @@ function file_unlink($path) {
 
 	$ret = @unlink($path);
 
-        if ($config['gzip_static']) {
-                $gzpath = "$path.gz";
+		if ($config['gzip_static']) {
+				$gzpath = "$path.gz";
 
 		@unlink($gzpath);
 	}
@@ -797,42 +794,6 @@ function listBoards($just_uri = false) {
 	return $boards;
 }
 
-function until($timestamp) {
-	$difference = $timestamp - time();
-	switch(TRUE){
-	case ($difference < 60):
-		return $difference . ' ' . ngettext('second', 'seconds', $difference);
-	case ($difference < 3600): //60*60 = 3600
-		return ($num = round($difference/(60))) . ' ' . ngettext('minute', 'minutes', $num);
-	case ($difference < 86400): //60*60*24 = 86400
-		return ($num = round($difference/(3600))) . ' ' . ngettext('hour', 'hours', $num);
-	case ($difference < 604800): //60*60*24*7 = 604800
-		return ($num = round($difference/(86400))) . ' ' . ngettext('day', 'days', $num);
-	case ($difference < 31536000): //60*60*24*365 = 31536000
-		return ($num = round($difference/(604800))) . ' ' . ngettext('week', 'weeks', $num);
-	default:
-		return ($num = round($difference/(31536000))) . ' ' . ngettext('year', 'years', $num);
-	}
-}
-
-function ago($timestamp) {
-	$difference = time() - $timestamp;
-	switch(TRUE){
-	case ($difference < 60) :
-		return $difference . ' ' . ngettext('second', 'seconds', $difference);
-	case ($difference < 3600): //60*60 = 3600
-		return ($num = round($difference/(60))) . ' ' . ngettext('minute', 'minutes', $num);
-	case ($difference <  86400): //60*60*24 = 86400
-		return ($num = round($difference/(3600))) . ' ' . ngettext('hour', 'hours', $num);
-	case ($difference < 604800): //60*60*24*7 = 604800
-		return ($num = round($difference/(86400))) . ' ' . ngettext('day', 'days', $num);
-	case ($difference < 31536000): //60*60*24*365 = 31536000
-		return ($num = round($difference/(604800))) . ' ' . ngettext('week', 'weeks', $num);
-	default:
-		return ($num = round($difference/(31536000))) . ' ' . ngettext('year', 'years', $num);
-	}
-}
-
 function displayBan($ban) {
 	global $config, $board;
 
@@ -1267,25 +1228,25 @@ function deletePost($id, $error_if_doesnt_exist=true, $rebuild_after=true) {
 	$query->bindValue(':board', $board['uri']);
 	$query->execute() or error(db_error($query));
 
-        // No need to run on OPs
-        if ($config['anti_bump_flood'] && isset($thread_id)) {
-                $query = prepare(sprintf("SELECT `sage` FROM ``posts_%s`` WHERE `id` = :thread", $board['uri']));
-                $query->bindValue(':thread', $thread_id);
-                $query->execute() or error(db_error($query));
-                $bumplocked = (bool)$query->fetchColumn();
+	// No need to run on OPs
+	if ($config['anti_bump_flood'] && isset($thread_id)) {
+		$query = prepare(sprintf("SELECT `sage` FROM ``posts_%s`` WHERE `id` = :thread", $board['uri']));
+		$query->bindValue(':thread', $thread_id);
+		$query->execute() or error(db_error($query));
+		$bumplocked = (bool)$query->fetchColumn();
 
-                if (!$bumplocked) {
-                        $query = prepare(sprintf("SELECT `time` FROM ``posts_%s`` WHERE (`thread` = :thread AND NOT email <=> 'sage') OR `id` = :thread ORDER BY `time` DESC LIMIT 1", $board['uri']));
-                        $query->bindValue(':thread', $thread_id);
-                        $query->execute() or error(db_error($query));
-                        $bump = $query->fetchColumn();
+		if (!$bumplocked) {
+			$query = prepare(sprintf("SELECT `time` FROM ``posts_%s`` WHERE (`thread` = :thread AND NOT email <=> 'sage') OR `id` = :thread ORDER BY `time` DESC LIMIT 1", $board['uri']));
+			$query->bindValue(':thread', $thread_id);
+			$query->execute() or error(db_error($query));
+			$bump = $query->fetchColumn();
 
-                        $query = prepare(sprintf("UPDATE ``posts_%s`` SET `bump` = :bump WHERE `id` = :thread", $board['uri']));
-                        $query->bindValue(':bump', $bump);
-                        $query->bindValue(':thread', $thread_id);
-                        $query->execute() or error(db_error($query));
-                }
-        }
+			$query = prepare(sprintf("UPDATE ``posts_%s`` SET `bump` = :bump WHERE `id` = :thread", $board['uri']));
+			$query->bindValue(':bump', $bump);
+			$query->bindValue(':thread', $thread_id);
+			$query->execute() or error(db_error($query));
+		}
+	}
 
 	if (isset($rebuild) && $rebuild_after) {
 		buildThread($rebuild);
@@ -2572,35 +2533,6 @@ function generate_tripcode($name) {
 	return array($name, $trip);
 }
 
-// Highest common factor
-function hcf($a, $b){
-	$gcd = 1;
-	if ($a>$b) {
-		$a = $a+$b;
-		$b = $a-$b;
-		$a = $a-$b;
-	}
-	if ($b==(round($b/$a))*$a)
-		$gcd=$a;
-	else {
-		for ($i=round($a/2);$i;$i--) {
-			if ($a == round($a/$i)*$i && $b == round($b/$i)*$i) {
-				$gcd = $i;
-				$i = false;
-			}
-		}
-	}
-	return $gcd;
-}
-
-function fraction($numerator, $denominator, $sep) {
-	$gcf = hcf($numerator, $denominator);
-	$numerator = $numerator / $gcf;
-	$denominator = $denominator / $gcf;
-
-	return "{$numerator}{$sep}{$denominator}";
-}
-
 function getPostByHash($hash) {
 	global $board;
 	$query = prepare(sprintf("SELECT `id`,`thread` FROM ``posts_%s`` WHERE `filehash` = :hash", $board['uri']));
@@ -2835,10 +2767,10 @@ function link_for($post, $page50 = false, $foreignlink = false, $thread = false)
 
 			if ($slug === false) {
 				$query = prepare(sprintf("SELECT `slug` FROM ``posts_%s`` WHERE `id` = :id", $b['uri']));
-		                $query->bindValue(':id', $id, PDO::PARAM_INT);
-        		        $query->execute() or error(db_error($query));
+				$query->bindValue(':id', $id, PDO::PARAM_INT);
+				$query->execute() or error(db_error($query));
 
-		                $thread = $query->fetch(PDO::FETCH_ASSOC);
+				$thread = $query->fetch(PDO::FETCH_ASSOC);
 
 				$slug = $thread['slug'];
 
@@ -2854,7 +2786,7 @@ function link_for($post, $page50 = false, $foreignlink = false, $thread = false)
 	}
 
 
-	     if ( $page50 &&  $slug)  $tpl = $config['file_page50_slug'];
+		 if ( $page50 &&  $slug)  $tpl = $config['file_page50_slug'];
 	else if (!$page50 &&  $slug)  $tpl = $config['file_page_slug'];
 	else if ( $page50 && !$slug)  $tpl = $config['file_page50'];
 	else if (!$page50 && !$slug)  $tpl = $config['file_page'];
@@ -2866,24 +2798,6 @@ function prettify_textarea($s){
 	return str_replace("\t", '&#09;', str_replace("\n", '&#13;&#10;', htmlentities($s)));
 }
 
-/*class HTMLPurifier_URIFilter_NoExternalImages extends HTMLPurifier_URIFilter {
-	public $name = 'NoExternalImages';
-	public function filter(&$uri, $c, $context) {
-		global $config;
-		$ct = $context->get('CurrentToken');
-
-		if (!$ct || $ct->name !== 'img') return true;
-
-		if (!isset($uri->host) && !isset($uri->scheme)) return true;
-
-		if (!in_array($uri->scheme . '://' . $uri->host . '/', $config['allowed_offsite_urls'])) {
-			error('No off-site links in board announcement images.');
-		}
-
-		return true;
-	}
-}*/
-
 function purify_html($s) {
 	global $config;
 
diff --git a/inc/functions/format.php b/inc/functions/format.php
new file mode 100644
index 00000000..79a71021
--- /dev/null
+++ b/inc/functions/format.php
@@ -0,0 +1,28 @@
+<?php
+namespace Vichan\Functions\Format;
+
+
+function format_timestamp(int $delta): string {
+	switch (true) {
+		case $delta < 60:
+			return $delta . ' ' . ngettext('second', 'seconds', $delta);
+		case $delta < 3600: //60*60 = 3600
+			return ($num = round($delta/ 60)) . ' ' . ngettext('minute', 'minutes', $num);
+		case $delta < 86400: //60*60*24 = 86400
+			return ($num = round($delta / 3600)) . ' ' . ngettext('hour', 'hours', $num);
+		case $delta < 604800: //60*60*24*7 = 604800
+			return ($num = round($delta / 86400)) . ' ' . ngettext('day', 'days', $num);
+		case $delta < 31536000: //60*60*24*365 = 31536000
+			return ($num = round($delta / 604800)) . ' ' . ngettext('week', 'weeks', $num);
+		default:
+			return ($num = round($delta / 31536000)) . ' ' . ngettext('year', 'years', $num);
+	}
+}
+
+function until(int $timestamp): string {
+	return format_timestamp($timestamp - time());
+}
+
+function ago(int $timestamp): string {
+	return format_timestamp(time() - $timestamp);
+}
diff --git a/inc/functions/num.php b/inc/functions/num.php
new file mode 100644
index 00000000..678312f3
--- /dev/null
+++ b/inc/functions/num.php
@@ -0,0 +1,33 @@
+<?php
+namespace Vichan\Functions\Num;
+
+// Highest common factor
+function hcf($a, $b){
+	$gcd = 1;
+
+	if ($a > $b) {
+		$a = $a+$b;
+		$b = $a-$b;
+		$a = $a-$b;
+	}
+	if ($b == (round($b / $a)) * $a) {
+		$gcd = $a;
+	} else {
+		for ($i = round($a / 2); $i; $i--) {
+			if ($a == round($a / $i) * $i && $b == round($b / $i) * $i) {
+				$gcd = $i;
+				$i = false;
+			}
+		}
+	}
+
+	return $gcd;
+}
+
+function fraction($numerator, $denominator, $sep) {
+	$gcf = hcf($numerator, $denominator);
+	$numerator = $numerator / $gcf;
+	$denominator = $denominator / $gcf;
+
+	return "{$numerator}{$sep}{$denominator}";
+}
diff --git a/inc/mod/pages.php b/inc/mod/pages.php
index fc81531e..34f920fd 100644
--- a/inc/mod/pages.php
+++ b/inc/mod/pages.php
@@ -3,6 +3,7 @@
 /*
  *  Copyright (c) 2010-2013 Tinyboard Development Group
  */
+use Vichan\Functions\Format;
 
 use Vichan\Functions\Net;
 
@@ -1558,7 +1559,7 @@ function mod_ban_post($board, $delete, $post, $token = false) {
 
 		if (isset($_POST['public_message'], $_POST['message'])) {
 			// public ban message
-			$length_english = Bans::parse_time($_POST['length']) ? 'for ' . until(Bans::parse_time($_POST['length'])) : 'permanently';
+			$length_english = Bans::parse_time($_POST['length']) ? 'for ' . Format\until(Bans::parse_time($_POST['length'])) : 'permanently';
 			$_POST['message'] = preg_replace('/[\r\n]/', '', $_POST['message']);
 			$_POST['message'] = str_replace('%length%', $length_english, $_POST['message']);
 			$_POST['message'] = str_replace('%LENGTH%', strtoupper($length_english), $_POST['message']);
diff --git a/inc/template.php b/inc/template.php
index 19c0d8b8..e6549d07 100644
--- a/inc/template.php
+++ b/inc/template.php
@@ -121,8 +121,8 @@ class Tinyboard extends Twig\Extension\AbstractExtension
 			new Twig\TwigFilter('date', 'twig_date_filter'),
 			new Twig\TwigFilter('poster_id', 'poster_id'),
 			new Twig\TwigFilter('count', 'count'),
-			new Twig\TwigFilter('ago', 'ago'),
-			new Twig\TwigFilter('until', 'until'),
+			new Twig\TwigFilter('ago', 'Vichan\Functions\Format\ago'),
+			new Twig\TwigFilter('until', 'Vichan\Functions\Format\until'),
 			new Twig\TwigFilter('push', 'twig_push_filter'),
 			new Twig\TwigFilter('bidi_cleanup', 'bidi_cleanup'),
 			new Twig\TwigFilter('addslashes', 'addslashes'),
diff --git a/post.php b/post.php
index 22bc67fa..e3f0682d 100644
--- a/post.php
+++ b/post.php
@@ -8,6 +8,7 @@ require_once 'inc/bootstrap.php';
 use Vichan\{Context, WebDependencyFactory};
 use Vichan\Driver\{HttpDriver, Log};
 use Vichan\Service\{RemoteCaptchaQuery, NativeCaptchaQuery};
+use Vichan\Functions\Format;
 
 /**
  * Utility functions
@@ -394,14 +395,14 @@ if (isset($_POST['delete'])) {
 			}
 
 			if ($post['time'] < time() - $config['max_delete_time'] && $config['max_delete_time'] != false) {
-				error(sprintf($config['error']['delete_too_late'], until($post['time'] + $config['max_delete_time'])));
+				error(sprintf($config['error']['delete_too_late'], Format\until($post['time'] + $config['max_delete_time'])));
 			}
 
 			if ($password != '' && $post['password'] != $password && (!$thread || $thread['password'] != $password))
 				error($config['error']['invalidpassword']);
 
 			if ($post['time'] > time() - $config['delete_time'] && (!$thread || $thread['password'] != $password)) {
-				error(sprintf($config['error']['delete_too_soon'], until($post['time'] + $config['delete_time'])));
+				error(sprintf($config['error']['delete_too_soon'], Format\until($post['time'] + $config['delete_time'])));
 			}
 
 			$ip = $_SERVER['REMOTE_ADDR'];