Untitled

Error:
Connected to temp at localhost successfully.
Fatal error: Call to a member function prepare() on null in C:\xampp\htdocs\temp\view.php on line 12
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dbconnect.php

<?php
    $host = 'localhost';
    $dbname = 'temp';
    $username = 'root';
    $password = '';

try {
    $pdo = new PDO("mysql:host=$host;dbname=$dbname", $username, $password);
    echo "Connected to $dbname at $host successfully.";
    $pdo = null;
} catch (PDOException $pe) {
    die("Could not connect to the database $dbname :" . $pe->getMessage());
}
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view.php
<!DOCTYPE html>
<html>
<head>
<title></title>
</head>
<body>
<?php
require_once 'dbconnect.php';

$sql = 'select name,unit,price from items';
//$q = $pdo->query($sql);
$q = $pdo->prepare($sql);  // -> ===== Line 12 =====
$q->execute();
$q->setFetchMode(PDO::FETCH_ASSOC);

?>
        <div id="container">
            <h1>Employees</h1>
            <table class="table table-bordered table-condensed">
                <thead>
                    <tr>
                        <th>Name English</th>
                        <th>Unit</th>
                        <th>Price</th>
                    </tr>
                </thead>
                <tbody>
                    <?php while ($row = $q->fetch()): ?>
                        <tr>
                            <td><?php echo htmlspecialchars($row['name']) ?></td>
                            <td><?php echo htmlspecialchars($row['unit']); ?></td>
                            <td><?php echo htmlspecialchars($row['price']); ?></td>
                        </tr>
                    <?php endwhile; ?>
                </tbody>
            </table>
</div>
</body>
</html>