How to return function result as linked arguments?

[d47081]

Trying to reproduce this method:
https://docs.gtk.org/Pango/method.Layout.xy_to_index.html

1 and 2 arguments are working, but
I have following construction where index_ and trailing must be returned as 3 and 4 arguments:

Php::Value PangoLayout_::xy_to_index(Php::Parameters &parameters)
{
	gint x = (gint) parameters[0];
	gint y = (gint) parameters[1];

	gint* index_;
	gint* trailing;

	return pango_layout_xy_to_index(PANGO_LAYOUT(instance), x, y, index_, trailing);
}

In other words, method must have following implementation in php

PangoLayout::xy_to_index($x, $y, &$index_, &$trailing): bool

Also my function return integer 0|1 not boolean type as documented. Is any way to change?