There is $inc object that allows you to store information about modules. Module information system can move as follows.

Code in fw_modules/mymodule/info_mymodule.php

<?php
//-------your module group name------------//
$modname='mymodule';
//-------group information-----------------//
$inc->lib['group_'.$modname]['name']=$modname;
$inc->lib['group_'.$modname]['version']=1.3;
$inc->lib['group_'.$modname]['author']='Bc. Peter Horváth';
$inc->lib['group_'.$modname]['email']='info[at]opensencillo[dot]com';
$inc->lib['group_'.$modname]['license']='GNU/GPL';
$inc->lib['group_'.$modname]['homepage']='www.mymodule.com';
$inc->lib['group_'.$modname]['integrity']='966x1$b9u7qga4401hu7';
$inc->lib['group_'.$modname]['your_own_key']='my own info';
//-------your module group function--------//
$inc->lib['function'][]='test function';
$inc->lib['function'][]='smile function';
$inc->lib['function'][]='good function';
?>

This saves the information about the module to RAM during execution of the script.
Information will be publicly available throughout the system.