logout and redirecting session in php

<?php

session_start();

session_unset();

session_destroy();

header("location:home.php");

exit();

?>

<?php
session_start();
session_destroy();
header("Location: home.php");
?>

Only this is necessary

session_start();
unset($_SESSION["nome"]);  // where $_SESSION["nome"] is your own variable. if you do not have one use only this as follow **session_unset();**
header("Location: home.php");

Use this instead:

<?
session_start();
session_unset();
session_destroy();

header("location:home.php");
exit();
?>