Warning: Cannot modify header information - headers already sent ..

[MDanz]

i get the error "Warning: Cannot modify header information - headers already sent by" with the below code. How do i solve it without using output buffering?

 

function logout($return) {

	unset($_SESSION['admin']);
	unset($_SESSION['username']);
  header( 'Location: ' . $return );
echo "<div class='fontall'><span class='fontdif'>You've been logged out.  </span><a href='$return'>Click Here</a><span class='fontdif' to return</span></div>";

	}

[PFMaBiSmAd]

The error message states where the output is occurring at that is preventing the header from working.

 

The solution is to determine what that output is and prevent it from occurring before you attempt to do a header() redirect.

[MDanz]

ok i don't understand.

 

 

this is the line that causes it

 

 header( 'Location: ' . $return );

 

 

The solution is to determine what that output is and prevent it from occurring before you attempt to do a header() redirect.

 

$return is the url of the current page, so when logging out it reloads current page.

 

What do i have to prevent?  I have a session_start(); at the top of the page is that what is causing it?

[revraz]

No, output to the browser is causing it.