[PHP] Session question

[Paul Halliday]

Is it OK to have session_start as an include?

I have something like this:

// Session init
session_start();

function sKill() {
    session_destroy();
    session_unset();
    header ("Location: login.php");
    exit();
}

function sInt() {
     header ("Location: login.php");
     exit();
}

if (!(isset($_SESSION['sLogin']) && $_SESSION['sLogin'] != '')) {
     sKill();
}

// Session variables
if (!isset($_SESSION['sUser']))  { sInt(); }  else { $sUser  =
$_SESSION['sUser'];}
if (!isset($_SESSION['sEmail'])) { sInt(); }  else { $sEmail =
$_SESSION['sEmail'];}
if (!isset($_SESSION['sType']))  { sInt(); }  else { $sType  =
$_SESSION['sType'];}
if (!isset($_SESSION['sTime']))  { sInt(); }  else { $sTime  =
$_SESSION['sTime'];}
if (!isset($_REQUEST['id']))     { $id = 0; } else { $id     = $_REQUEST['id'];}

// Kill the session if the ids dont match.
if ($id != $_SESSION['id']) {
    sKill();
}

// Kill the session if timeout is exceeded.
if (isset($_SESSION['LAST_ACTIVITY']) && (time() -
$_SESSION['LAST_ACTIVITY'] > $sTime)) {
    sKill();
}

Can I just call this session.php and include it at the beginning of each file?

-- 
Paul Halliday
http://www.squertproject.org/

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