Test

1.php

<?php

function getWorkingDays($startDate, $endDate, $holidays) {
    $endDate = strtotime($endDate);
    $startDate = strtotime($startDate);

    $days = ($endDate - $startDate) / 86400 + 1;

    $no_full_weeks = floor($days / 7);
    $no_remaining_days = fmod($days, 7);

    $the_first_day_of_week = date("N", $startDate);
    $the_last_day_of_week = date("N", $endDate);

    if ($the_first_day_of_week <= $the_last_day_of_week) {
        if ($the_first_day_of_week <= 6 && 6 <= $the_last_day_of_week) {
            $no_remaining_days--;
        }
        if ($the_first_day_of_week <= 7 && 7 <= $the_last_day_of_week) {
            $no_remaining_days--;
        }
    } else {
        if ($the_first_day_of_week == 7) {
            $no_remaining_days--;
            if ($the_last_day_of_week == 6) {
                $no_remaining_days--;
            }
        } else {
            $no_remaining_days -= 2;
        }
    }

    $workingDays = $no_full_weeks * 5;
    if ($no_remaining_days > 0) {
        $workingDays += $no_remaining_days;
    }

    foreach($holidays as $holiday) {
        $time_stamp=strtotime($holiday);
        if ($startDate <= $time_stamp && $time_stamp <= $endDate && date("N",$time_stamp) != 6 && date("N",$time_stamp) != 7) {
            $workingDays--;
        }
    }

    return $workingDays;
}

$answers = $mysql->query('SELECT * FROM answers WHERE DATEDIFF(FROM_UNIXTIME(NOW()), last_answer_time ) > 2');

$answers = array_filter($answers, function ($answer) {
    return getWorkingDays(date('r', $answer->last_answer_time), date('r'), [date('Y') . '-01-07', '...']) > 2;
});

2.php

<?php

// Tech stack:
// Workerman for websocket
// Yii2 for queue (and more...)

use Workerman\Worker;

require_once __DIR__ . '/vendor/autoload.php';

$ws_worker = new Worker('websocket://0.0.0.0:2346');


$ws_worker->onConnect = function ($connection) {
    echo "New connection\n";
};

$ws_worker->onMessage = function ($connection, $data) {
    Yii::$app->queue->delay(60)->push(new SaveIntoDb($data));
};

$ws_worker->onClose = function ($connection) {
    echo "Connection closed\n";
};

Worker::runAll();

3.php

<?php

if (preg_match('/\[SPOILER=".*?"\]/', $text)) {
    if (strpos($text, '[/SPOILER]') === false) {
        $text .= '[/SPOILER]';
    }
    $text = preg_replace_callback('/(\[SPOILER=".*?"\])(.*)(\[\/SPOILER\])/', function ($math) {
        return $match[1] . preg_replace('/\[SPOILER=".*?"\]|\[\/SPOILER\]/', '', $match[2]) . $match[3];
    }, $text);
}