<?php
$servername = "localhost";
$username = "alumnos";
$password = "alumnos";
$dbname = "testphp";

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

// Check connection
if ($conn->connect_error) {
    die("Connection failed: " . $conn->connect_error);
}
echo "Connected successfully <br>";

$sql = "SELECT * FROM usuarios";
$result = $conn->query($sql);

if ($result->num_rows > 0) {
    // output data of each row
    while($row = $result->fetch_assoc()) {
		echo "DNI: <b>".$row['dni']."</b> Nombre: <b>".$row['nombre']."</b> Apellidos: <b>" .$row['apellidos']."</b> Telefono: <b>".$row['telefono']."</b><br>";
    }
}else{
	echo "No ahi usuarios que mostrar";
}
$conn->close();
?>