<?php
if(isset($_SESSION['logged_in']))
{
header('Location: test.php');
echo "test";
?>
<?php
}
else
{
?>
<a href="#" onclick="CallAfterLogin();"><img src="facebook-login-button.png" border="0" alt="Log in with Facebook"></a>
<?php } ?>
After the user is login, I visit back to this file, and it just won't redirect. It did appear the echo but not the redirect, I wonder.
try this
<?php
ob_start();
if(isset($_SESSION['logged_in']))
{
header('Location: test.php');
echo "test";
?>
<?php
}
else
{
?>
<a href="#" onclick="CallAfterLogin();"><img src="facebook-login-button.png" border="0" alt="Log in with Facebook"></a>
<?php }
ob_end_flush();
?>
Judging by your code, it appears that you are trying to make this redirect happen in the middle of your page - you MUST do a redirect before any output has been made. Since this is right before an a tag I am assuming you already sent the <html> tag at some point, for example.
<?php //headers ok here ?>
<!DOCTYPE html>
<?php
// Too late for headers already.