I am trying to make a shortcode to only output some text on the home page (and the shortcode is in custom site settings footer html code)

I have just realised writing this that the shortcode context is customsitesettings and not the page_controller context where I had it, but this still leaves me with a small problem if finding the current page and whether its parentid is 0 (home page).

So this was my junk page_controller code:

public function About($args){
if ($this->getParentID()== 0 && isset($args['id'])){
$about = '<a data-reveal-id="'.$args['id'].'">About</a> |&nbsp;';
return $about;
}
}

How do I get the page object in the customsitesettings context? I'm feeling a bit thick here!

Maybe its Director::get_current_page()->ParentID

So my function is

public function About($args){
if (Director::get_current_page()->ParentID == 0 && isset($args['id'])){
$about = '<a data-reveal-id="'.$args['id'].'">About</a> |&nbsp;';
return $about;
}
}

Oh yes and I was trying to avoid testing for url 'home' but i guess that is sacrosanct and many pages have ParentID=0. That was a mistake.

So this works:

public function About($args){
if (Director::get_current_page()->URLSegment == 'home' && isset($args['id'])){
$about = '<a data-reveal-id="'.$args['id'].'">About</a> |&nbsp;';
return $about;
}
}