PHP 8 Compatibility

app/Core/DateParser.php

@@ -175,7 +175,7 @@ class DateParser extends Base
      */
     public function getTimestamp($value)
     {
-        if (ctype_digit($value)) {
+        if (ctype_digit((string) $value)) {
             return (int) $value;
         }
 
@@ -263,7 +263,7 @@ class DateParser extends Base
      */
     public function getTimestampFromIsoFormat($value)
     {
-        return $this->removeTimeFromTimestamp(ctype_digit($value) ? $value : strtotime($value));
+        return $this->removeTimeFromTimestamp(ctype_digit((string) $value) ? $value : strtotime($value));
     }
 
     /**
@@ -291,7 +291,7 @@ class DateParser extends Base
     {
         foreach ($fields as $field) {
             if (! empty($values[$field])) {
-                if (ctype_digit($values[$field])) {
+                if (ctype_digit((string) $values[$field])) {
                     $values[$field] = date($format, $values[$field]);
                 }
             } else {

app/Core/Http/RememberMeCookie.php

@@ -112,7 +112,7 @@ class RememberMeCookie extends Base
             '',
             time() - 3600,
             $this->helper->url->dir(),
-            null,
+            '',
             $this->request->isHTTPS(),
             true
         );

app/Core/Http/Request.php

@@ -79,7 +79,7 @@ class Request extends Base
      */
     public function getIntegerParam($name, $default_value = 0)
     {
-        return isset($this->get[$name]) && ctype_digit($this->get[$name]) ? (int) $this->get[$name] : $default_value;
+        return isset($this->get[$name]) && ctype_digit((string) $this->get[$name]) ? (int) $this->get[$name] : $default_value;
     }
 
     /**

app/Core/Ldap/User.php

@@ -318,7 +318,7 @@ class User
      * @access public
      * @return string
      */
-    public function getGroupAdminDn()
+    public function getGroupAdminDn(): string
     {
         return strtolower(LDAP_GROUP_ADMIN_DN);
     }
@@ -329,7 +329,7 @@ class User
      * @access public
      * @return string
      */
-    public function getGroupManagerDn()
+    public function getGroupManagerDn(): string
     {
         return LDAP_GROUP_MANAGER_DN;
     }

app/Core/Session/SessionHandler.php

@@ -24,32 +24,38 @@ class SessionHandler implements SessionHandlerInterface
         $this->db = $db;
     }
 
+    #[\ReturnTypeWillChange]
     public function close()
     {
         return true;
     }
 
+    #[\ReturnTypeWillChange]
     public function destroy($sessionID)
     {
         return $this->db->table(self::TABLE)->eq('id', $sessionID)->remove();
     }
 
+    #[\ReturnTypeWillChange]
     public function gc($maxlifetime)
     {
         return $this->db->table(self::TABLE)->lt('expire_at', time())->remove();
     }
 
+    #[\ReturnTypeWillChange]
     public function open($savePath, $name)
     {
         return true;
     }
 
+    #[\ReturnTypeWillChange]
     public function read($sessionID)
     {
         $result = $this->db->table(self::TABLE)->eq('id', $sessionID)->findOneColumn('data');
         return $result ?: '';
     }
 
+    #[\ReturnTypeWillChange]
     public function write($sessionID, $data)
     {
         $lifetime = time() + (ini_get('session.gc_maxlifetime') ?: 1440);

app/Core/Translator.php

@@ -61,7 +61,7 @@ class Translator
         array_unshift($args, $this->get($identifier, $identifier));
 
         foreach ($args as &$arg) {
-            $arg = htmlspecialchars($arg, ENT_QUOTES, 'UTF-8', false);
+            $arg = htmlspecialchars((string) $arg, ENT_QUOTES, 'UTF-8', false);
         }
 
         return call_user_func_array(