changement condition header

SiteWeb/html/header.php

@@ -11,7 +11,7 @@
           <div class="collapse navbar-collapse" id="navbarCollapse">
             <ul class="navbar-nav mr-auto">
               <?php
-                if(isset($_SESSION['login'])){
+                if(!empty($_SESSION['login'])){
 
                   echo'<li class="nav-item">
                         <a class="nav-link" href="accueil.php">Accueil<span class="sr-only">(current)</span></a>