alert before redirecting

[funbinod]

can I make an alert display before redirecting a page?

 

I tried this but it gave error "headers already sent............"

if (($time - $lastActive) > 1200) {	mysqli_query($connect, "DELETE FROM session WHERE cid='$cid' AND uid='$uid'") or die("Error: ".mysqli_error($connect));	$user->logout();	session_start();	echo '<script>alert("Timeout!");</script>';	$_SESSION['timeout'] = 'Timeout!';	die(header("location: login.php"));}

and the $_SESSION['timeout'] also did not work either...

Edited January 16, 2015 by funbinod

[Ingolme]

You can't print anything before sending a header because in an HTTP request headers must always get sent before the content.

 

If you send a location header, the user's not going to see what you printed anyways because the browser would immediately jump to the next page.

 

To get around this you can make Javascript perform the redirect instead of sending a header.

[bonvisao]

You can't print anything before sending a header because in an HTTP request headers must always get sent before the content.

 

If you send a location header, the user's not going to see what you printed anyways because the browser would immediately jump to the next page.

 

To get around this you can make Javascript perform the redirect instead of sending a header.

Yes .