
        get_posts();
        ]]>


        new mysqli(
    'localhost',
    $user,
    $pass,
    $db
);

$results = $mysqli->query(
    "SELECT * FROM wp_posts LIMIT 5"
);
        ]]>


        wp_insert_post(
    array( 'post_title' => 'Title' )
);

// or...

global $wpdb;
$wpdb->insert(
    $wpdb->posts,
    array( 'post_title' => 'Title' ),
    array( '%s' )
);
        ]]>


        new PDO(
    $dsn,
    $user,
    $pass
);

$stmt = $pdo->prepare(
    "INSERT INTO wp_posts (post_title)
    VALUES (?)"
);

$stmt->execute( array( 'Title' ) );
        ]]>