Untitled

<head>
    <meta charset="utf-8"/>
</head>

<?php

$mysqli = new mysqli('localhost', 'p99640tc_myapp', 'qwerty123', 'p99640tc_myapp');
if ($mysqli->connect_errno) {
    echo "ОШИБКА ПОДКЛЮЧЕНИЯ!";
}
$sql = "SELECT * FROM markers";
if (!$result = $mysqli->query($sql)) {
    echo "Извините, возникла проблема в работе сайта.";
    exit;
}

$markers = array();
while ($marker = $result->fetch_assoc()) {
    array_push($markers, $marker);
}

echo json_encode($markers, JSON_UNESCAPED_UNICODE);
/*
while ($marker = $result->fetch_assoc()) {
    echo $marker['name'];
}
*/

?>