Users

<!DOCTYPE html>
<html>
<head>
    <title>Users</title>
</head>
<body>

<style>
table, tr, th, td {
    border: 1px dotted #000;
    border-collapse: collapse;
    padding: 5px 10px 5px 10px;
}
</style>

<?php
$usernames = array("John", "Jack", "Anna", "Ray", "Richard");
$emails = array("john.d@example.com", "jack.r@hotmail.com", "anna.a@example.org", "ray@ray.org", "richard@richard.net");
?>

<?php
if(count($usernames) !== count($emails) || empty($usernames) && empty($emails))
{
    echo "The array either are empty or values do not match.";
    die();
}
?>

<table>
    <tr>
        <th>Username</th>
        <th>Email</th>
    </tr>
<?php foreach(array_combine($usernames, $emails) as $username => $email) { ?>
    <tr>
        <td><?php echo $username; ?></td>
        <td><?php echo $email; ?></td>
    </tr>
<?php } ?>
</table>