<form class="login-form" action="checklogin_profe.php" method="post">
  <input name="num" type="text" id="num" required placeholder="Numero de Empleado">
  <input name="contra" type="password" id="contra" required placeholder="Contraseña">
   <button type="submit">Entrar</button>
</form>

<?php
session_start();
?>
<?php
$host_db = "localhost";
$user_db = "root";
$pass_db = "";
$db_name = "tutorias";
$tbl_name = "profesor";
$conexion = new mysqli($host_db, $user_db, $pass_db, $db_name);
  if ($conexion->connect_error) {
  die("No se pudo conectar a la Base de Datos: " . $conexion->connect_error);
  }
 $usenum = $_POST['num'];
 $pass = $_POST['contra'];
 $sql = "SELECT contraseñaprofe FROM profesor WHERE id_profesor = '$usenum'";
 $result = $conexion->query($sql);
 if ($result->num_rows > 0) {
 $row = $result->fetch_array(MYSQLI_ASSOC);
}
  if (password_verify($pass, $row['contraseñaprofe'])) {
     $_SESSION['loggedin'] = true;
     $_SESSION['username'] = $username;
     $_SESSION['start'] = time();
     $_SESSION['expire'] = $_SESSION['start'] + (5 * 60);
     echo "Bienvenido! " . $_SESSION['username'];
     echo "<br><br><a href=home_profes.php>Panel de Control</a>";
     }
    else {
    echo "Username o Password estan incorrectos.";
    echo "<br><a href='login_profe.html'>Volver a Intentarlo</a>";
     }
  mysqli_close($conexion);
  ?>

<form class="login-form" action="checklogin.php" method="post">
  <input name="username" type="text" id="username" required placeholder="Usuario">
  <input name="password" type="password" id="password" required placeholder="Contraseña">
   <button type="submit">Entrar</button>

</form>

<?php
session_start();
?>
<?php
$host_db = "localhost";
$user_db = "root";
$pass_db = "";
$db_name = "tutorias";
$tbl_name = "administrador";
$conexion = new mysqli($host_db, $user_db, $pass_db, $db_name);
  if ($conexion->connect_error) {
  die("No se pudo conectar a la Base de Datos: " . $conexion->connect_error);
  }
 $username = $_POST['username'];
 $password = $_POST['password'];
 $sql = "SELECT * FROM administrador WHERE usuario = '$username'";
 $result = $conexion->query($sql);
 if ($result->num_rows > 0) {
 $row = $result->fetch_array(MYSQLI_ASSOC);
}
  if (password_verify($password, $row ['contraseña2'])) {
     $_SESSION['loggedin'] = true;
     $_SESSION['username'] = $username;
     $_SESSION['start'] = time();
     $_SESSION['expire'] = $_SESSION['start'] + (5 * 60);
     echo "Bienvenido! " . $_SESSION['username'];
     echo "<br><br><a href=panel-control.php>Panel de Control</a>";
     }
    else {
    echo "Username o Password estan incorrectos.";
    echo "<br><a href='login.html'>Volver a Intentarlo</a>";
     }
  mysqli_close($conexion);
  ?>