Fix ctype_alnum (#4182)

* Fix ctype_alnum
#fix https://github.com/FreshRSS/FreshRSS/issues/4180
Ensure `ctype_alnum()` gets a string

* Changelog

1 files changed, 3 insertions, 3 deletions

diff --git a/lib/Minz/Session.php b/lib/Minz/Session.php
index d735f7949..924e9f5f9 100644
--- a/lib/Minz/Session.php
+++ b/lib/Minz/Session.php
@@ -150,12 +150,12 @@ class Minz_Session {
 		setcookie($name, '', 1, '', '', Minz_Request::isHttps(), true);
 	}
 
-	public static function setLongTermCookie($name, $value, $expire) {
+	public static function setLongTermCookie(string $name, string $value, $expire) {
 		setcookie($name, $value, $expire, '', '', Minz_Request::isHttps(), true);
 	}
 
-	public static function getLongTermCookie($name) {
-		return isset($_COOKIE[$name]) ? $_COOKIE[$name] : null;
+	public static function getLongTermCookie(string $name): string {
+		return isset($_COOKIE[$name]) ? $_COOKIE[$name] : '';
 	}
 
 }