Question

I want to show a user’s full name if the user is logged in. If not, the text “Login” should be displayed.

This is what I have so far:

session_start();

$session = $_SESSION['username'];

include "config.php";

$sql = mysql_query("SELECT * from user");    
while($d=mysql_fetch_array($sql))
{
    if($d['status']=='online' and $_SESSION['username'] == $d['username'])
    {
        $full_names = $d['full_name'];

        echo $full_names;
    }
    else
    {
        echo "Login";
    }
}

Any ideas?

Answer 1

You should use an SQL WHERE (as @ThiefMaster mentioned), but just to answer your question:

$full_names = false;
while($d=mysql_fetch_array($sql)) {
    if($d['status']=='online' and $_SESSION['username'] == $d['username']) {
        $full_names = $d['full_name'];

        echo $full_names;
    }
}

if(!$full_names) {
  echo "Login";
}