How do I replace class MyMenu extends JMenu on Joomla 4 or 6?

JMenu became AbstractMenu. Subclasses that do not implement load() are abstract and fatal. Use Extend AbstractMenu and implement load(). Implement load(). Use the namespaced AbstractMenu.

What error does class MyMenu extends JMenu throw after a Joomla upgrade?

Class LmsMenu contains 1 abstract method. Cannot instantiate abstract class

Why does JMenu is abstract — you must implement load() break after migrating from Joomla 3?

JMenu became AbstractMenu. Subclasses that do not implement load() are abstract and fatal. People notice: menu class abstract, JMenu load().

JMENU-ABSTRACT-001

class MyMenu extends JMenu

JMenu is abstract — you must implement load()

JMenu became AbstractMenu. Subclasses that do not implement load() are abstract and fatal.

class MyMenu extends JMenu → Extend AbstractMenu and implement load()

Dies at Joomla 3 → 4J3: Works nativelyJ4: Changed behaviourJ6: Removed — fatalBC plugin: partialPatch possible — review itJoomla API

What you will see

Class LmsMenu contains 1 abstract method
Cannot instantiate abstract class

Symptoms people search

menu class abstract · JMenu load()

Replace this code

Swap class MyMenu extends JMenu for Extend AbstractMenu and implement load().

Joomla 3

Remove or stop calling this

class LmsMenu extends JMenu {
    // Joomla 3 allowed incomplete subclasses
}

Joomla 4 / 6

Use this instead

class LmsMenu extends \Joomla\CMS\Menu\AbstractMenu {
    public function load() { /* return items */ return true; }
}

How to fix it

1Implement load().
2Use the namespaced AbstractMenu.

Also known as

AbstractMenu · JMenu load · doExecute

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class MyMenu extends JMenu

What you will see

Symptoms people search

Replace this code

How to fix it

Also known as

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