diff --git a/src/Session/Session.php b/src/Session/Session.php
index cf0157f..4d5b99d 100644
--- a/src/Session/Session.php
+++ b/src/Session/Session.php
@@ -1,173 +1,186 @@
-<?php
-
-namespace Bubu\Http\Session;
-
-use Bubu\Http\Session\Exception\SessionException;
-
-class Session
-{
-    public function __construct(?int $sessionCache = null, ?int $sessionLifetime = null)
-    {
-        if (session_status() !== PHP_SESSION_ACTIVE) {
-
-            if (is_null($sessionLifetime)) $sessionLifetime = $_ENV['SESSION_DURATION'] ?? 0;
-
-            ini_set('session.gc_maxlifetime', $sessionLifetime * 60 * 60 * 24);
-            session_set_cookie_params($sessionLifetime * 60 * 60 * 24);
-
-            if (is_null($sessionCache))  $sessionCache = $_ENV['HTTP_EXPIRES'] ?? 0;
-
-            session_cache_expire($sessionCache);
-            session_cache_limiter($_ENV['SESSION_CACHE_LIMITER'] ?? 'private');
-            session_start();
-        }
-    }
-
-    /**
-     * start a new session
-     *
-     * @param integer|null $sessionCache
-     * @param integer|null $sessionLifetime
-     * @return Session
-     */
-    public static function start(?int $sessionCache = null, ?int $sessionLifetime = null): Session
-    {
-        return new Session($sessionCache, $sessionLifetime);
-    }
-
-    /**
-     * Verify if a key is registre
-     *
-     * @param string $key
-     * @return boolean
-     */
-    public static function exists(string $key): bool
-    {
-        self::start();
-        if (isset($_SESSION[$key])) {
-            return true;
-        } else {
-            return false;
-        }
-    }
-
-    /**
-     * get a value for key
-     *
-     * @param string $key
-     * @return mixed
-     */
-    public static function get(string $key): mixed
-    {
-        self::start();
-        if (isset($_SESSION[$key])) {
-            return $_SESSION[$key];
-        } else {
-            throw new SessionException('Undefined key', 404);
-        }
-    }
-
-    /**
-     * return all session
-     *
-     * @return array
-     */
-    public static function getAll(): array
-    {
-        self::start();
-        return $_SESSION;
-    }
-
-    /**
-     * Set new value / create key
-     *
-     * @param string $key
-     * @param mixed $data
-     * @return void
-     */
-    public static function set(string $key, mixed $data): void
-    {
-        self::start();
-        $_SESSION[$key] = $data;
-    }
-
-    /**
-     * Add value for array
-     *
-     * @param string $key
-     * @param mixed $data
-     * @return void
-     */
-    public static function add(string $key, mixed $data): void
-    {
-        self::start();
-        $_SESSION[$key][] = $data;
-    }
-
-    /**
-     * Push value in array (array_merge_recursive)
-     *
-     * @param string $key
-     * @param mixed $data
-     * @return void
-     */
-    public static function push(string $key, mixed $data): void
-    {
-        self::start();
-        if (!array_key_exists($key, $_SESSION)) $_SESSION[$key] = [];
-        $_SESSION[$key] = array_merge_recursive($_SESSION[$key], $data);
-    }
-
-    /**
-     * Delete value
-     *
-     * @param string $key
-     * @return void
-     */
-    public static function delete(string $key): void
-    {
-        self::start();
-        unset($_SESSION[$key]);
-    }
-
-    /**
-     * Change lifetime of a session
-     *
-     * @param integer $newLifetime
-     * @return void
-     */
-    public static function changeSessionLifetime(int $newLifetime)
-    {
-        $tempSession = $_SESSION;
-        $cacheExpire = session_cache_expire();
-        self::destroy();
-        self::start($cacheExpire, $newLifetime);
-        session_regenerate_id(true);
-        $_SESSION = $tempSession;
-    }
-
-    /**
-     * Clean session data
-     *
-     * @return void
-     */
-    public static function clean(): void
-    {
-        self::start();
-        foreach ($_SESSION as $key => $value) unset($_SESSION[$key]);
-    }
-
-    /**
-     * Destroy a session
-     *
-     * @return void
-     */
-    public static function destroy(): void
-    {
-		self::clean();
-        session_reset();
-        session_unset();
-        session_destroy();
-        setcookie('PHPSESSID', '', 1);
-    }
-}
+<?php
+
+namespace Bubu\Http\Session;
+
+use Bubu\Http\Session\Exception\SessionException;
+
+class Session
+{
+    public function __construct(?int $sessionCache = null, ?int $sessionLifetime = null)
+    {
+        if (session_status() !== PHP_SESSION_ACTIVE) {
+
+            if (is_null($sessionLifetime)) $sessionLifetime = $_ENV['SESSION_DURATION'] ?? 0;
+
+            ini_set('session.gc_maxlifetime', $sessionLifetime * 60 * 60 * 24);
+            session_set_cookie_params($sessionLifetime * 60 * 60 * 24);
+
+            if (is_null($sessionCache))  $sessionCache = $_ENV['HTTP_EXPIRES'] ?? 0;
+
+            session_cache_expire($sessionCache);
+            session_cache_limiter($_ENV['SESSION_CACHE_LIMITER'] ?? 'private');
+            session_start();
+        }
+    }
+
+    /**
+     * start a new session
+     *
+     * @param integer|null $sessionCache
+     * @param integer|null $sessionLifetime
+     * @return Session
+     */
+    public static function start(?int $sessionCache = null, ?int $sessionLifetime = null): Session
+    {
+        return new Session($sessionCache, $sessionLifetime);
+    }
+
+    /**
+     * Verify if a key is registre
+     *
+     * @param string $key
+     * @return boolean
+     */
+    public static function exists(string $key): bool
+    {
+        self::start();
+        if (isset($_SESSION[$key])) {
+            return true;
+        } else {
+            return false;
+        }
+    }
+
+    /**
+     * get a value for key
+     *
+     * @param string $key
+     * @return mixed
+     */
+    public static function get(string $key): mixed
+    {
+        self::start();
+        if (isset($_SESSION[$key])) {
+            return $_SESSION[$key];
+        } else {
+            throw new SessionException('Undefined key', 404);
+        }
+    }
+
+    /**
+     * get a value for key without error
+     *
+     * @param string $key
+     * @return mixed
+     */
+    public static function getSafe(string $key): mixed
+    {
+        self::start();
+        if (isset($_SESSION[$key])) return $_SESSION[$key];
+        else return null;
+    }
+
+    /**
+     * return all session
+     *
+     * @return array
+     */
+    public static function getAll(): array
+    {
+        self::start();
+        return $_SESSION;
+    }
+
+    /**
+     * Set new value / create key
+     *
+     * @param string $key
+     * @param mixed $data
+     * @return void
+     */
+    public static function set(string $key, mixed $data): void
+    {
+        self::start();
+        $_SESSION[$key] = $data;
+    }
+
+    /**
+     * Add value for array
+     *
+     * @param string $key
+     * @param mixed $data
+     * @return void
+     */
+    public static function add(string $key, mixed $data): void
+    {
+        self::start();
+        $_SESSION[$key][] = $data;
+    }
+
+    /**
+     * Push value in array (array_merge_recursive)
+     *
+     * @param string $key
+     * @param mixed $data
+     * @return void
+     */
+    public static function push(string $key, mixed $data): void
+    {
+        self::start();
+        if (!array_key_exists($key, $_SESSION)) $_SESSION[$key] = [];
+        $_SESSION[$key] = array_merge_recursive($_SESSION[$key], $data);
+    }
+
+    /**
+     * Delete value
+     *
+     * @param string $key
+     * @return void
+     */
+    public static function delete(string $key): void
+    {
+        self::start();
+        unset($_SESSION[$key]);
+    }
+
+    /**
+     * Change lifetime of a session
+     *
+     * @param integer $newLifetime
+     * @return void
+     */
+    public static function changeSessionLifetime(int $newLifetime)
+    {
+        $tempSession = $_SESSION;
+        $cacheExpire = session_cache_expire();
+        self::destroy();
+        self::start($cacheExpire, $newLifetime);
+        session_regenerate_id(true);
+        $_SESSION = $tempSession;
+    }
+
+    /**
+     * Clean session data
+     *
+     * @return void
+     */
+    public static function clean(): void
+    {
+        self::start();
+        foreach ($_SESSION as $key => $value) unset($_SESSION[$key]);
+    }
+
+    /**
+     * Destroy a session
+     *
+     * @return void
+     */
+    public static function destroy(): void
+    {
+		self::clean();
+        session_reset();
+        session_unset();
+        session_destroy();
+        setcookie('PHPSESSID', '', 1);
+    }
+}