tratarLogin.php

<?php

include("../libs/connect.php");

$name = $_POST['name'];
$password = $_POST['password'];

    $tb = $con->prepare("select id, name, password from admin where name=:name and password=:password");
    $tb->bindParam(":name", $name, PDO::PARAM_STR);
    $tb->bindParam(":password", $password, PDO::PARAM_STR);
    $tb->execute();
    $l = $tb->fetch(PDO::FETCH_ASSOC);
    if (!empty($l)) {
        $_SESSION["usuario"] = $name;
        header("Location: admin.php" . $l["usuario"]);
    } else {
        echo "Nome de Ususário ou Senha Incorretos !";
    }
?>