Neuron-PHP

CommandNotFound extends NotFound
in package

Exception thrown when a requested command cannot be found or instantiated.

This exception extends the generic NotFound exception and is specifically used in command pattern implementations when a command factory cannot locate or create a requested command class. It indicates that the specified command identifier does not correspond to any registered or available command.

Common causes:

  • Command class does not exist
  • Command not registered with the factory
  • Incorrect command name or identifier
  • Command class cannot be instantiated (missing dependencies)
  • Autoloading issues preventing command class loading

This exception is typically thrown by:

  • Command factories during command instantiation
  • Command registries during command lookup
  • Command invokers when resolving command identifiers
Tags
see
NotFound

Base exception for not found errors

example 
// Thrown by command factory
$commandClass = "App\Commands\\{$commandName}Command";
if (!class_exists($commandClass)) {
    throw new CommandNotFound("Command '{$commandName}' not found");
}

// Caught in command processing
try {
    $command = $factory->get('nonexistent-command');
} catch (CommandNotFound $e) {
    // Handle unknown command
    $this->logger->error('Unknown command requested', ['command' => $commandName]);
    return $this->showAvailableCommands();
}

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