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

try {
    $conn = new PDO("mysql:host=$servername;dbname=$dbname", $username, $password);
    // set the PDO error mode to exception
    $conn->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);


    $sql = "SELECT liczba FROM `lista` WHERE liczba>3 LIMIT 1;";
        foreach ($conn->query($sql) as $row)
        {
            $i = $row['liczba'];
            echo "test2";
        }


}
catch(PDOException $e) {
    echo "Error: " . $e->getMessage();
}

?>