Matched git up to date check to work on server

admin/update.php

@@ -4,7 +4,8 @@ $relativePath = "../";
 require_once $relativePath . 'classes/dao.php';
 
 $statut = shell_exec("git status");
-$canUpdate = strpos($statut, 'Your branch is up to date') === false;
+$canUpdate = strpos($statut, 'Your branch is up to date') !== false &&
+    strpos($statut, 'Your branch is up-to-date' !== false);
 ?>
 <div class="inner">
     <h1>ADMIN</h1>