مشكلة في عدم ظهور widgets في ووردبريس

عايز مساعدة في تطوير ووردبريس لم يظهر معي قسم الويدجت بالرغم من ان الكود صحيح تماما
 

<?php

// Register KeepItSimple Widgets
function keepitsimple_register_sidebars(){
$sidebar = array(
"name" => "Main Sidebar",
"id" => "sidebar",
"before_widget" => "<div class='widget'>",
"after_widget" => "</div>",
"before_title" => "<h3>",
"after_title" => "</h3>"
);

register_sidebar($sidebar);

$footer1 = array(
"name" => "footer 1",
"id" => "footer1",
"before_widget" => "<div>",
"after_widget" => "</div>",
"before_title" => "<h3>",
"after_title" => "</h3>"
);

register_sidebar($footer1);


$footer2 = array(
"name" => "footer 2",
"id" => "footer2",
"before_widget" => "<div>",
"after_widget" => "</div>",
"before_title" => "<h3>",
"after_title" => "</h3>"
);

register_sidebar($footer2);


$footer3 = array(
"name" => "footer 3",
"id" => "footer3",
"before_widget" => "<div>",
"after_widget" => "</div>",
"before_title" => "<h3>",
"after_title" => "</h3>"
);

register_sidebar($footer3);



}
add_action('widgets_init','keepitsimple_register_sidebars');


// keepitsimple register menus

function keepitsimple_register_menus(){
$keepitsimple_menus = array(
'upper-menu' => 'Main Menu',
'footer-menu' => 'Footer Menu'
);

register_nav_menus($keepitsimple_menus);
}
add_action('init','keepitsimple_register_menus')