Fix syntax and error

http-errors/lib.php

@@ -1,7 +1,7 @@
 <?php
 
 $locale = 'en';
-foreach (explode(',', preg_replace('/[A-Z0-9]|q=|;|-|\./', '', $_SERVER['HTTP_ACCEPT_LANGUAGE'] ?? '') as $client_locale)) {
+foreach (explode(',', preg_replace('/[A-Z0-9]|q=|;|-|\./', '', $_SERVER['HTTP_ACCEPT_LANGUAGE'] ?? '')) as $client_locale) {
 	if (in_array($client_locale, ['en', 'fr'], true)) {
 		$locale = $client_locale;
 		break;

router.php

@@ -72,6 +72,12 @@ if (!TITLES_LINEAGE[array_key_last(TITLES_LINEAGE)]) {
 	exit('Page not found.');
 }
 
+if (isset($_SERVER['SERVER_NAME']) !== true)
+	exit('Missing <code>$_SERVER[\'SERVER_NAME\']</code>');
+if (in_array($_SERVER['SERVER_NAME'], CONF['common']['public_domains'], true) !== true)
+	exit('The current <code>$_SERVER[\'SERVER_NAME\']</code> is not allowed in configuration.');
+define('SERVER_NAME', $_SERVER['SERVER_NAME']);
+
 const SESSION_COOKIE_NAME = 'servnest-session-key';
 function startSession() {
 	session_start([
@@ -119,12 +125,6 @@ if (isset($_SESSION['id'])) {
 	}
 }
 
-if (isset($_SERVER['SERVER_NAME']) !== true)
-	output(500, 'Missing $_SERVER[\'SERVER_NAME\']');
-if (in_array($_SERVER['SERVER_NAME'], CONF['common']['public_domains'], true) !== true)
-	output(500, 'The current server name is not allowed in configuration.');
-define('SERVER_NAME', $_SERVER['SERVER_NAME']);
-
 function displayFinalMessage($data) {
 	if (isset($data['final_message'])) {
 		echo $data['final_message'];