diff --git a/library/Zend/Session/SaveHandler/DbTable.php b/library/Zend/Session/SaveHandler/DbTable.php
index 0efdbc08f4..df627a0a14 100644
--- a/library/Zend/Session/SaveHandler/DbTable.php
+++ b/library/Zend/Session/SaveHandler/DbTable.php
@@ -290,7 +290,7 @@ public function getOverrideLifetime()
      * @param string $name
      * @return boolean
      */
-    public function open($save_path, $name)
+    public function open($save_path, $name): bool
     {
         $this->_sessionSavePath = $save_path;
         $this->_sessionName     = $name;
@@ -303,7 +303,7 @@ public function open($save_path, $name)
      *
      * @return boolean
      */
-    public function close()
+    public function close(): bool
     {
         return true;
     }
@@ -314,7 +314,7 @@ public function close()
      * @param string $id
      * @return string
      */
-    public function read($id)
+    public function read($id): string
     {
         $return = '';
 
@@ -338,7 +338,7 @@ public function read($id)
      * @param string $data
      * @return boolean
      */
-    public function write($id, $data)
+    public function write($id, $data): bool
     {
         $data = [$this->_modifiedColumn => time(),
                       $this->_dataColumn     => (string) $data];
@@ -366,7 +366,7 @@ public function write($id, $data)
      * @param string $id
      * @return boolean
      */
-    public function destroy($id)
+    public function destroy($id): bool
     {
         $this->delete($this->_getPrimary($id, self::PRIMARY_TYPE_WHERECLAUSE));
         return true; //always return true, since if nothing can be deleted, it is already deleted and thats OK.
@@ -378,7 +378,7 @@ public function destroy($id)
      * @param int $maxlifetime
      * @return true
      */
-    public function gc($maxlifetime)
+    public function gc($maxlifetime): int|false
     {
         $this->delete($this->getAdapter()->quoteIdentifier($this->_modifiedColumn, true) . ' + '
                     . $this->getAdapter()->quoteIdentifier($this->_lifetimeColumn, true) . ' < '