say hello to a user

Dear Olaf,

in the access_user class, what's your opinion to say a Welcome to registered users in the scripts?
for example, in some pages i don't need to protection, i just wanna say a "Welcome" to users who have loged in. i use the following code, but i get some Warnings!

----header.php----
session_start();
function showheader1 () {           
if (isset($_SESSION['user'])) { // user has loged in
    $hello_name =  "Welcome ".$_SESSION['user']; }
echo($hello_name)." ";
--------

the warning i get:
Warning: session_start(): Cannot send session cache limiter - headers already sent (output

started at D:\Program Files\Apache Group\Apache2\htdocs\index.php:1) in D:\Program Files\Apache

Group\Apache2\htdocs\header.php on line 3

best regards

Atabak.

p.s.  i use showheader function in the index.php script, as below:

----index.php------
include("/header.php");
showheader();
--------------

Hello,

you have several problems in your solution:
1. don't output data to the browser if you send a header some rows later;)

there is a example how to show the user name after login iniside the example file: example.php, note the two rows containing:

Code:

$page_protect->get_user_info();
$hello_name = ($page_protect->user_full_name != "") ? $page_protect->user_full_name : $page_protect->user;

after using this code you can echo the variable $hello_name like:

Code:

echo "Hello ".$hello_name." !";

Dear Olaf,
thanks for your reply.
this soloution is good only for the registered users that they have loged in before!
but in a website, we have visitors who have not loged in! (even not
registered)
so as a first step we should realize if a user has loged in.
what's your opinion as the best way, to check if a visitor has loged in or not!

then we will say Hello to the users who they have loged in to the website.

Dear Olaf,
thanks for your reply.
this soloution is good only for the registered users that they have loged in before!
but in a website, we have visitors who have not loged in! (even not
registered)
so as a first step we should realize if a user has loged in.
what's your opinion as the best way, to check if a visitor has loged in or not!

then we will say Hello to the users who they have loged in to the website.

maybe this simple test:

Code:

if (empty($_SESSION['user'])) echo "Hello stranger";

[Guest]

[62.861]

Googlebot, adsense, Yahoo crawler