php functions

<?php
include('../../Configuration.php');

$conn = mysqli_connect($host, $dbuser, $dbpass, $chardb);
if (!$conn) {
    die("Connection failed: " . mysqli_connect_error());
}

$sql = "SELECT guid, name FROM characters";
$result = mysqli_query($conn, $sql);

if (mysqli_num_rows($result) > 0) {
    while($row = mysqli_fetch_assoc($result)) {
        if(isset($_POST['guid'])) {
            echo json_encode(
                array(
                    array('id' => $row['guid'], 'name' => $row['name']),
                    array('id' => $row['guid'], 'name' => $row['name']),
                    array('id' => $row['guid'], 'name' => $row['name']),
                )
            );
        }
    }
} else {
    echo "...";
}

header('Content-Type: application/json');
mysqli_close($conn);
?>