<?php
session_start();
$conn = mysqli_connect("localhost","root","","esp");
    $username=$_POST['nome'];
    $password=$_POST['senha'];
    $_SESSION['login_user']=$username;
    $query = mysqli_query("SELECT * FROM usuarios WHERE Nome='$username' and senha='$password'");
     if (mysqli_num_rows($query) != 0)
    {
     echo "<script language='javascript' type='text/javascript'> location.href='home.php' </script>";
      }
      else
      {
    echo "<script type='text/javascript'>alert('User Name Or Password Invalid!')</script>";
        //header("Location: login.php");

    }

?>