Fix DEFAULT_ENCODING that it is string

phpstan-bootstrap.php

@@ -10,5 +10,6 @@ $_SERVER['HTTP_HOST'] = 'soba.tokyo.tequila.jp';
 define('BASE_NAME', '');
 define('SITE_DOMAIN', '');
 define('HOST_NAME', 'soba.tokyo.tequila.jp');
+define('DEFAULT_ENCODING', 'en_US.UTF-8');
 
 // __END__

www/configs/config.master.php

@@ -107,7 +107,7 @@ define('COMPILE_ID', 'COMPILE_' . BASE_NAME . '_' . SERVER_NAME_HASH);
 // default lang + encoding
 define('DEFAULT_LOCALE', $_ENV['LOCALE'] ?? 'en_US.UTF-8');
 // default web page encoding setting
-define('DEFAULT_ENCODING', array_pad(explode('.', DEFAULT_LOCALE, 2), 2, 'UTF-8'));
+define('DEFAULT_ENCODING', (string)array_pad(explode('.', DEFAULT_LOCALE, 2), 2, 'UTF-8')[1]);
 
 /************* HOST NAME *****************/
 // get the name without the port

www/lib/CoreLibs/Language/GetLocale.php

@@ -96,7 +96,7 @@ class GetLocale
 				$encoding = defined('SITE_ENCODING') && !empty(SITE_ENCODING) ?
 					SITE_ENCODING :
 					// or default encoding, if not 'UTF-8'
-					(defined('DEFAULT_ENCODING') && !empty(DEFAULT_ENCODING) ?
+					(defined('DEFAULT_ENCODING') ?
 						DEFAULT_ENCODING : 'UTF-8');
 			}
 		}