mysqli_report(MYSQLI_REPORT_ERROR | MYSQLI_REPORT_STRICT);
const HOST_NAME = '127.0.0.1';
const DB_NAME = 'address_book';
const LOGIN_DB = 'basart';
const PASSWORD_DB = "megusta";
const PORT = 3306;
$mysqlConnection = new mysqli(HOST_NAME, LOGIN_DB, PASSWORD_DB, DB_NAME, PORT);
$query = "SELECT * FROM `users`";
$rs = mysqli_query($mysqlConnection , $query );
?>
<form class="datalogin" action="login.php" method="post" id="datalogin">
<fieldset>
    <legend>Все данные</legend>
<?php
while ($row = mysqli_fetch_assoc($rs)) {
    echo
    "<table class='tab2' border='2'  bgcolor='#ff7f50' width='15%'>
    <tr  style='color: chartreuse'>
    <tr>
    <td>", $row['first_name'], "</td>
    <td>", $row['surname'], "</td>
    <td >", $row['phone_number'], "</td>
    </table>";
    ?>
    <input type="checkbox" name="checkthis[]" value="<?php
    $checkname = $row['first_name'];
    $checksurname = $row['surname'];
    $checkpn = $row['phone_number'];
?>"> Yes <br>