minor fixes

src/class/email.php

@@ -37,7 +37,7 @@ function __construct(&$engine)
 	// $email_from			- place specific address into the 'From:' field
 	// $charset				- send message in specific charset (w/o actual re-encoding)
 	// $xtra_headers		- (array) insert additional mail headers
-	function send_mail($email_to, $name_to, $subject, $body, $email_from = '', $charset = '', $xtra_headers = [])
+	function send_mail($email_to, $name_to, $subject, $body, $email_from = '', $charset = '', $xtra_headers = []): void
 	{
 		if (!$this->engine->db->enable_email || ( !$email_to || !$subject || !$body) )
 		{
@@ -60,7 +60,7 @@ function send_mail($email_to, $name_to, $subject, $body, $email_from = '', $char
 		$this->php_mailer($email_to, $name_to, $email_from, $name_from, $subject, $body, $charset, $xtra_headers);
 	}
 
-	function php_mailer($email_to, $name_to, $email_from, $name_from, $subject, $body, $charset = '', $xtra_headers = '')
+	function php_mailer($email_to, $name_to, $email_from, $name_from, $subject, $body, $charset = '', $xtra_headers = ''): bool
 	{
 		$mail = new PHPMailer(true); // the true param means it will throw exceptions on errors, which we need to catch
 

src/class/feed.php

@@ -29,14 +29,14 @@ function __construct(&$engine)
 		$this->charset	= $this->engine->get_charset($this->lang);
 	}
 
-	function write_file($name, $body)
+	function write_file($name, $body): void
 	{
 		$file_name = Ut::join_path(XML_DIR, $name . '_' . preg_replace('/[^a-zA-Z\d]/', '', mb_strtolower($this->engine->db->site_name)) . '.xml');
 		@file_put_contents($file_name, $body);
 		@chmod($file_name, CHMOD_FILE);
 	}
 
-	function changes()
+	function changes(): void
 	{
 		$limit	= 30;
 		$name	= 'changes';
@@ -102,7 +102,7 @@ function changes()
 		$this->engine->canonical = false;
 	}
 
-	function feed($feed_cluster = '')
+	function feed($feed_cluster = ''): void
 	{
 		$limit			= 10;
 		$name			= 'news';
@@ -217,7 +217,7 @@ function feed($feed_cluster = '')
 		$this->engine->canonical = false;
 	}
 
-	function comments()
+	function comments(): void
 	{
 		$limit	= 20;
 		$name	= 'comments';
@@ -296,7 +296,7 @@ function comments()
 	}
 
 	// Sitemaps XML file: http://www.sitemaps.org
-	function site_map()
+	function site_map(): void
 	{
 		$prefix		= $this->engine->db->table_prefix;
 
@@ -368,7 +368,7 @@ function site_map()
 	}
 
 	// OpenSearch XML description file
-	function open_search()
+	function open_search(): void
 	{
 		$this->engine->canonical = true;
 

src/class/wacko.php

@@ -663,7 +663,7 @@ function get_user_language()
 	 *
 	 * @return string Message set
 	 */
-	function _t($name, $lang = ''): string|array
+	function _t($name, $lang = '')
 	{
 		if ($this->db->multilanguage)
 		{