Strange session problem

[wepnop]

Hi. I have to check if a session is started or not, and then, check for the rank of the user. For that i use two functions like is_administrator,etc.

 

Well, but this isnt working. I cant get any clear way to know if a session have been already started or not.

function is_administrator() {
session_start();
if (isset($_SESSION['usr']) and empty($_SESSION['usr'])) {

	$l = conect();
	$user = $_SESSION['usr'];
	$cons = "SELECT * FROM `users` WHERE usr='" . $user . '\';';		
	$res = mysql_query ($cons,$l);
	$ob = mysql_fetch_array($res);

	if ($ob['tipo'] == 'A') {
		return true;
	}

}
return false;
}

 

What i want to do is to check if a sesion exist, if not, return false. If the sesion exist, check for the user rank and return true/false.

[MidOhioIT]

try this instead:

 

if ( ($_SESSION["usr"])  )

 

that should be good enough to test if it is set or not...

[matthew9090]

don't put the session start in the function put it at the very top of the page the it using the function

[Sanjib Sinha]

Before sending any header text to the page the session should start. So it is always wise and good practice  to keep it in a 'require.php' and put it on the top.

Please note when working with sessions that a record of a session is not created until a variable has been registered using the session_register() function or by adding a new key to the $_SESSION superglobal array. This holds true regardless of if a session has been started using the session_start() function.