<form method="post">
Username:
<input type="text" name="nicknameee" placeholder="Username">
<br>
Password:
<input type="password" name="passwordd" placeholder="Password">
<br>
<input type="submit" name="Submit2" value="submit">
<br>
<?php
if (isset($_POST['Submit2'])) {

    $result1 = $conn->query("SELECT nicknamee, parola FROM Users2 WHERE nicknamee='$_POST[nicknameee]' AND parola='$_POST[passwordd]' ");

    if (mysql_num_rows($result1)>0){
        echo "We are connected";
    }
    else{
        echo "INCORRECT";
    }

 }
?>
</form>