How to alter Wordpress global post title using php - php

Question

I know i can use:
global $wp_query;
$wp_query->is_page = true;
For example to set the global is_page conditional to true.
Can i change the global post title in a similar way so it would effect the the_title() returned value?
To clarify things:
I need for a use of a "virtual page" case, where no post is actually loaded and i don't want to use any existing post title. just inject some custom title to the current globals so i will get it when using the_title on the current page.

Answer 1

To modify the title you can use a build in hook of wordpress:
function suppress_if_blurb( $title, $id = null ) {
if ( in_category(' blurb', $id ) ) {
return '';
}
return $title;
}
add_filter( 'the_title', 'suppress_if_blurb', 10, 2 );
https://codex.wordpress.org/Plugin_API/Filter_Reference/the_title

Answer 2

Finally found it. gladly it's very simple :) but this piece of code will also create all other post vars for a "fake post/page":
$post_id = -99; // negative ID, to avoid clash with a valid post
$post = new stdClass();
$post->ID = $post_id;
$post->post_title = 'Some title or other';
$wp_post = new WP_Post( $post );
wp_cache_add( $post_id, $wp_post, 'posts' );
global $wp, $wp_query;
$wp_query->post = $wp_post;
$wp_query->posts = array( $wp_post );
$wp_query->queried_object = $wp_post;
$wp_query->queried_object_id = $post_id;
$wp_query->is_404=false;
$wp_query->is_page=true;
$GLOBALS['wp_query'] = $wp_query;
$wp->register_globals();
More details here!