How using plugin in php code

I use plugins HungryFEED and OSM in WordPress pages with the following syntax:

[osm_map lat=”48.863″ long=”2.439″ zoom=”15″ width=”800″ height=”800″ marker_file_list=”https://localhost/point.txt” type=”AllOsm”] for OSM

[hungryfeed url=”https://askapena.org/?q=eu/rss.xml” filter=”bayonne” feed_fields=”” max_items=”1″ date_format=”d-m-Y”truncate_description=”300″ template=”1″] for HungryFEED

This works well

Now I wish to call (by another method) in one of my files that I created in a personal directory under wp-content/plugins/perso for example in my wordpress page I have this:

<?php
$file = $_SERVER['DOCUMENT_ROOT'] . "/../fr/wp-content/plugins/perso/" . "mapage.php";
require_once($file);
?>

Here are the contents of mypage.php:

<?php
echo "test”;
/*
comment appler mes plugins  HungryFEED et OSM
*/
?>

When I click on the page of my site “test” is displayed correctly.

Now what I can not do is find the php function to call my plugins!

Can you help me?

thank you