APP-CLI-DOEXECUTE-001

class MyCli extends JApplicationCli

JApplicationCli is abstract — implement doExecute()

CliApplication (and WebApplication) are abstract in Joomla 4+. The entry point is doExecute(), not a custom execute() you invent.

class MyCli extends JApplicationCli → CliApplication + doExecute()

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

What you will see

  • Cannot instantiate abstract class
  • Class ... contains 1 abstract method and must therefore be declared abstract

Symptoms people search

CLI script abstract class · doExecute

Replace this code

Swap class MyCli extends JApplicationCli for CliApplication + doExecute().

Joomla 3

Remove or stop calling this

class LmsCli extends JApplicationCli {
    public function execute() { /* old */ }
}

Joomla 4 / 6

Use this instead

class LmsCli extends \Joomla\CMS\Application\CliApplication {
    protected function doExecute(): void { /* your CLI work */ }
}

How to fix it

  1. 1Implement protected doExecute().
  2. 2Do not instantiate CliApplication directly.

Also known as

doExecute · CliApplication abstract · JApplicationWeb abstract

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