Error: Call to undefined method ReflectionUnionType::getName() (0)
#0 C:\wamp64\www\invisiondev4.7dev\applications\core\modules\admin\applications\developer.php(3578): IPS\Plugin\_Hook->editForm(Object(IPS\Http\Url\Internal))
#1 C:\wamp64\www\invisiondev4.7dev\system\Dispatcher\Controller.php(107): IPS\core\modules\admin\applications\_developer->editHook()
#2 C:\wamp64\www\invisiondev4.7dev\applications\core\modules\admin\applications\developer.php(69): IPS\Dispatcher\_Controller->execute('do')
#3 C:\wamp64\www\invisiondev4.7dev\system\Dispatcher\Dispatcher.php(153): IPS\core\modules\admin\applications\_developer->execute()
#4 C:\wamp64\www\invisiondev4.7dev\admin\index.php(13): IPS\_Dispatcher->run()
#5 {main}

Added a hook to extend class \IPS\Content\Controller, I get this error when trying to edit the hook from the Developer Centre.

Using PHP 8.0.23

Edited February 25, 20231 yr by TDBF

I’m having the same issue, and I’ve traced it to this function on line 4353 in system/Content/Controller.php:

protected function sendModerationAlert( array $values, \IPS\Content\Item|\IPS\Content\Comment $content ) : \IPS\core\Alerts\Alert
{ }

More specifically, the second argument, the union types, causes issues for the editForm function in system/Plugin/Hook.php. On line 370, the editForm function loops through parameters and tries to get their types and names:

$parameters[] = ( $parameter->getType() ? ( ( ( $parameter->allowsNull() ) ? '?' : '' ). '\\' . $parameter->getType()->getName() . ' ' ) : '' ) . ( $parameter->isPassedByReference() ? '&' : '' ) . '$' . $parameter->name . ( $parameter->isOptional() ? ( '=' . var_export( $parameter->getDefaultValue(), TRUE ) ) : '' );

This works with single types, but not with union types.

A single type returns a ReflectionNamedType, while union types return ReflectionUnionType, and trying to call getName() on a ReflectionUnionType will not work. I assume a simple check for ReflectionUnionType inside the try block would solve the issue.

As far as I can tell, this issue affects all hooks to \IPS\Content\Controller and every class extending that class.

For the record, I’m using PHP 8.1.16.

We'll address this in v5, until then I would suggest to either just fix it manually in the IDE, or to literally just use the IDE to implement the methods.