[Solved] You added this code to your theme's functions.php:register_nav_menu('header-menu', 'Header Menu');But the menu does not appear in the WordPress admin under Appearance > Menus > Manage Locations.... | Wordpress

Wordpress - Themes and Appearance

You added this code to your theme's functions.php:

register_nav_menu('header-menu', 'Header Menu');

But the menu does not appear in the WordPress admin under Appearance > Menus > Manage Locations. What is the likely problem?

AThe code must be inside a function hooked to <code>after_setup_theme</code>

BYou need to flush permalinks to see the menu location

CYou forgot to call <code>register_nav_menus()</code> instead of <code>register_nav_menu()</code>

DMenus only appear if you create a menu first

Step-by-Step Solution

Solution:

Step 1: Understand when to register menus
Menu registration code should run during theme setup, typically hooked to after_setup_theme.
Step 2: Check if code runs too early
Placing register_nav_menu() directly in functions.php without hook may run too early, so WordPress doesn't register it properly.
Final Answer:
The code must be inside a function hooked to after_setup_theme -> Option A
Quick Check:
Register menus inside after_setup_theme hook [OK]

Quick Trick: Hook menu registration to after_setup_theme [OK]

Common Mistakes:

Using register_nav_menus() instead of register_nav_menu() is not required for one menu
Flushing permalinks does not affect menu registration
Assuming menus appear without registering locations

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You added this code to your theme's functions.php: