bloc-pw-override.php

<?php

function qa_get_request_content(): ?array
{
    $request      = qa_request();
    $requestparts = qa_request_parts();
    $firstlower   = strtolower($requestparts[0]);
    $routing      = qa_page_routing();
    $page         = $firstlower . '/';

    // todo: to wiadomo, że jest do poprawy, ale tu dalem koncept tylko
    if (isset($routing[$page]) && in_array($request, ['messages', 'message/superadmin'])) {
        qa_set_template($firstlower !== '' ? $firstlower : 'qa'); // will be changed later
        $qa_content = require QA_INCLUDE_DIR . 'pages/default.php';

        if (isset($qa_content)) {
            qa_set_form_security_key();
        }

        return $qa_content;
    }

    return qa_get_request_content_base();
}

bloc-pw-page.php

<?php
declare(strict_types=1);

class block_pw_page
{
    private $directory;
    private $urltoroot;

    public function load_module(string $directory, string $urltoroot): void
    {
        $this->directory = $directory;
        $this->urltoroot = $urltoroot;
    }

    public function match_request(string $request): bool
    {
        return in_array($request, ['messages', 'message/superadmin']);
    }

    public function process_request(string $request): ?array
    {
        $qa_content = require QA_INCLUDE_DIR . '/pages/messages.php';

        echo "<h1 style='color: red'>just a test</h1>";

        return $qa_content;
    }
}

metadata.json

{
  "name": "Block pw",
  "uri": "https://forum.pasja-informatyki.pl",
  "description": "Very powerful and useful plugin for blocking pw from unpleasant users :)",
  "version": "1.0",
  "date": "2020-03-16",
  "author": "Mariusz08",
  "author_uri": "https://forum.pasja-informatyki.pl/user/Mariusz08",
  "license": "GPLv3+",
  "min_q2a": "1.5"
}

qa-plugin.php

<?php
/*
    Plugin Name: Block pw
    Plugin URI: https://forum.pasja-informatyki.pl
    Plugin Description: Very powerful and useful plugin for blocking pw from unpleasant users :)
    Plugin Version: 1.0
    Plugin Date: 2020-03-16
    Plugin Author: https://forum.pasja-informatyki.pl/user/Mariusz08
    Plugin License: GPLv3
    Plugin Minimum Question2Answer Version: 1.7
    Plugin Update Check URI:
    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.
    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.
    More about this license: http://www.gnu.org/licenses/gpl.html

*/

if (!defined('QA_VERSION')) {
    header('Location: ../../');
    exit;
}

qa_register_plugin_module('page', 'block-pw-page.php', block_pw_page::class, 'Block pw page');
qa_register_plugin_overrides('block-pw-override.php');