what does @ do?

[owaring]

i have the following example code

if ( @$_SESSION['login'] != "1" )
		{
		header("Location: loginPage.php");
		exit();
		}

my query is what is the @ symbol for, and what does it do?

[planetsim]

@ surpresses errors.

A better way to write this block of code is like this

if (!isset($_SESSION['login']) || $_SESSION['login'] != 1)
{
    header("Location: loginPage.php");
    exit(); 
}

You should really avoid using @ when testing, and only use it where it could give out server type information like on MySQL functions.