PHP PDO with while and fetchall code example

Example 1: how to fetch data using pdo in php

<?php
require_once 'dbconfig.php';

try {
    $pdo = new PDO("mysql:host=$host;dbname=$dbname", $username, $password);

    $sql = 'SELECT lastname,
                    firstname,
                    jobtitle
               FROM employees
              ORDER BY lastname';

    $q = $pdo->query($sql);
    $q->setFetchMode(PDO::FETCH_ASSOC);
} catch (PDOException $e) {
    die("Could not connect to the database $dbname :" . $e->getMessage());
}
?>
<!DOCTYPE html>
<html>
    <head>
        <title>PHP MySQL Query Data Demo</title>
        <link href="css/bootstrap.min.css" rel="stylesheet">
        <link href="css/style.css" rel="stylesheet">
    </head>
    <body>
        <div id="container">
            <h1>Employees</h1>
            <table class="table table-bordered table-condensed">
                <thead>
                    <tr>
                        <th>First Name</th>
                        <th>Last Name</th>
                        <th>Job Title</th>
                    </tr>
                </thead>
                <tbody>
                    <?php while ($row = $q->fetch()): ?>
                        <tr>
                            <td><?php echo htmlspecialchars($row['lastname']) ?></td>
                            <td><?php echo htmlspecialchars($row['firstname']); ?></td>
                            <td><?php echo htmlspecialchars($row['jobtitle']); ?></td>
                        </tr>
                    <?php endwhile; ?>
                </tbody>
            </table>
    </body>
</div>
</html>

Example 2: php pdo fetch from db

$dbhost = @mysql_connect($host, $user, $pass) or die('Unable to connect to server');

@mysql_select_db('divebay') or die('Unable to select database');
$search = $_GET['searchdivebay'];
$query = trim($search);

$sql = "SELECT * FROM auction WHERE name LIKE '%" . $query . "%'";



if(!isset($query)){
echo 'Your search was invalid';
exit;
} //line 18

$result = mysql_query($trim);
$numrows = mysql_num_rows($result);
mysql_close($dbhost);

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