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<?php

$servername = "localhost";
$username = "root";
$password = "test";
$dbname = "test";

// Create Connection
$conn = new mysqli($servername, $username, $password, $dbname);

//check Connection
if ($conn->connect_error) {
	die("Connection failed: ". $conn->connect_error);
}

$conn->close();
?>

<!DOCTYPE html>
<html>
<head>
	<title>Dropdown AJAX</title>
</head>
<body>
<div class="city">
	<label>Stadt</label>
	<select name="city">
		<option value="">Wähle eine Stadt</option>
		<!-- populate using php -->
		<?php
			$query = "SELECT ort FROM test2";
			$result = mysqli_query($conn, $query);
			//loop
			foreach ($result as $city) {
			?>
		<option value="<?php echo $city["ort"]; ?>"></option>
		<?php
			}
		?>
	</select>
</div>
</body>
</html>