<?php

final class Init
{
    private $host;
    private $dbName;
    private $user;
    private $password;
    private $connection;

    /**
     * Init constructor.
     */
    public function __construct($host, $dbName, $user, $password)
    {
        $this->host = $host;
        $this->dbName = $dbName;
        $this->user = $user;
        $this->password = $password;

        try {
            $this->connection = new \PDO("mysql:host=$this->host;dbname=$this->dbName", $this->user, $this->password);
            $this->connection->setAttribute(\PDO::ATTR_ERRMODE, \PDO::ERRMODE_EXCEPTION);
            $this->create();
            $this->fill();

        } catch (\PDOException $e) {
            echo 'There are PDO Exception';
        } finally {
            /* some finally code */
        }
    }


    /** Create table `test`
     * @return int
     */
    private function create()
    {
        $db = $this->connection;
        $sql = "CREATE TABLE IF NOT EXISTS `test` (
                    `id` INT(11) NOT NULL AUTO_INCREMENT,
                    `script_name` CHAR(25) NOT NULL,
                    `start_time` INT(11) NOT NULL,
                    `end_time` INT(11) NOT NULL,
                    `result` ENUM('normal','illegal','failed','success') NOT NULL,
                     PRIMARY KEY (`id`)
                     )
                     ENGINE=InnoDB DEFAULT CHARSET=utf8";
        $db->exec($sql);
    }

    /**
     * Fill in table `test`
     * @return int
     */
    private function fill()
    {
        $db = $this->connection;
        $sql = "INSERT INTO `test` (`script_name`, `start_time`, `end_time`, `result`) VALUES (?, ?, ?, ?)";
        $j = 0;
        $db->beginTransaction();
        $sth = $db->prepare($sql);

            function rowGenerator() {
            for ($i = 1; $i <= 11111; $i++) {
                $script = 'script' . $i;
                $start = strtotime('-1 months') + $i * 24 * 60 * 60;
                $end = strtotime('-1 month') + ($i + 1) * 24 * 60 * 60;
                $resultVariants = ['normal', 'illegal', 'failed', 'success'];
                $result = $resultVariants[array_rand($resultVariants, 1)];

                (yield [$script, $start, $end, $result]);
            }
        };

        foreach (rowGenerator() as $value) {

            ++$j;
            $sth->execute($value);
            if (0 === ($j % 500)) {
                $db->commit();
                $db->beginTransaction();
            }
        }
        $db->commit();
    }

    /**
     * @return array
     */
    public function get()
    {
        $db = $this->connection;
        $sql = "SELECT * FROM `test` WHERE `result` IN ('success',  'normal')";

        return $db->query($sql)->fetchAll();
    }
}

?>

<h3>Create new Init()</h3>

<?php $init = new Init('localhost', 'test_dbs', 'root', 55555678); ?>
<br>

<h3>Calling Init::get()</h3>

<?php $rows = $init->get() ?>


<table border="" style="width: 100%" align="center">
    <thead>
    <th>ID</th>
    <th>script_name</th>
    <th>start_time</th>
    <th>end_time</th>
    <th>result</th>
    </thead>

    <tbody>
    <?php foreach ($rows as $row): ?>
        <?php $background = $row['result'] === 'success' ? 'green' : 'yellow' ?>
        <tr style="background-color: <?php echo $background ?>">
            <td><?php echo $row['id'] ?></td>
            <td><?php echo $row['script_name'] ?></td>
            <td><?php echo date('d-m-Y', $row['start_time']) ?></td>
            <td><?php echo date('d-m-Y', $row['end_time']) ?></td>
            <td><?php echo $row['result'] ?></td>
        </tr>
    <?php endforeach; ?>
    </tbody>
</table>