<?php
$servername = "localhost";
$username = "root";
$password = "";
$dbname = "test";

// Create connection
$conn = new mysqli($servername, $username, $password, $dbname);
// Check connection
if ($conn->connect_error) {
    die("Connection failed: " . $conn->connect_error);
}

//nome do db é test e da tabela é teste
$sql = "SELECT id, teste1, teste2,teste3 FROM teste";
$result = $conn->query($sql);

if ($result->num_rows > 0) {
    echo "<table><tr><th>ID</th><th>teste1</th><th>teste2</th><th>teste3</th></tr>";
    // output data of each row
    while($row = $result->fetch_assoc()) {
        echo "<tr>";
        echo "<td>".$row["id"]."</td>";
        echo "<td>".$row["teste1"]. "</td>";
        echo "<td>".$row["teste2"]. "</td>";
        echo "<td>".$row["teste3"]. "</td></tr>";
    }
    echo "</table>";
} else {
    echo "0 results";
}
$conn->close();
?>