/classes/Model.php

<?php
    include_once 'D:\USR\apache\htdocs\s2.localhost\Phoenix_demo\classes\Connection.php';

    /**
     * Model
     */
    class Model
    {
        /**
         * Path to changelog
         */
        const CHANGE_LOG = 'D:/USR/apache/htdocs/s2.localhost' . '/Phoenix_demo/changelog.txt';

        /**
         * @var class_Connection
         */
        private $db;

        /**
         *
         * @var int
         */
        private $numOfQuotes = 6;
        /**
         *
         * @var bool
         */
        private $color_on = true;

        /**
         * Получает доступ к БД
         */
        public function __construct($config, $doc_root)
        {
            $this->db = new Connection($config, $doc_root);
        }

        /**
         * Цвет цитат на странице
         *
         * @param bool $color_on
         */

        /**
         *
         * @param integer $numOfQuotes
         */
        public function setNumOfQuotes($numOfQuotes)
        {
            $this->numOfQuotes = $numOfQuotes;
        }

        /**
         *
         * @return integer Number of quotes model currently is set to retrieve
         */
        public function getNumOfQuotes()
        {
            return $this->numOfQuotes;
        }

        /**
         *
         * @param bool $color_on If color of quotes is set on
         */
        public function setColor($color_on)
        {
            $this->color_on = $color_on;
        }

        /**
         * @return bool $color_on If color of quotes is set on
         */
        public function getColor()
        {
            return $this->color_on;
        }

        /**
         *
         * @return array Array of strings, each string a line
         */
        public function getChanges()
        {
            $changes = file(self::CHANGE_LOG, FILE_IGNORE_NEW_LINES | FILE_SKIP_EMPTY_LINES);
            return $changes;
        }

        /**
         *
         * @return array Array of strings, each string a citation
         */
        public function getQuotes()
        {
            $min = 0; $max = 0;
            //получает диапазон номеров цитат из БД
            $this->db->fetchInterval($min, $max);

            //инициализирует массив цитат  и их число
            $ids[0] = 0;
            $count = $this->numOfQuotes;
            //для каждой из шести цитат
            for ($i = 0; $i < $count; $i++)
            {
                do
                {
                    $temp_id = $this->db->uniqueNum($min, $max, $ids);
                    $ids[$i] = $temp_id;
                    $result = $this->db->fetchQuote($ids[$i]);
                }
                while (mysqli_num_rows($result) === 0);
                $citations[] = mysqli_fetch_array($result)[0];
            }
            return $citations;
        }
    }