<?php	
	session_start();
	session_register("your_name");
	if(!empty($your_name)){
		// && !isset($submit)){
		echo "I already know your name. $your_name";
	}
	
	elseif(empty($your_name) && !isset($submit)){
		echo "<form name=myform method=post action=$PHP_SELF>
			<input type=text name=first_name> first name

			<input type=text name=last_name> last name

			<input type=submit name=submit value=submit>
			</form>";
	}elseif (isset($submit) && empty($your_name)){
		$your_name = $first_name . " " . $last_name;
		echo "Thank you, $your_name";
	}
		
?>

<?php
	mysql_connect("localhost","root","") or die ("Keine Verbindung");
	mysql_select_db("forum") or die ("Keine Datenbank");
	
	session_start();
	session_register("your_name");
	
	echo $HTTP_SESSION_VARS["your_name"];
	
	
	echo session_is_registered("your_name");
	echo $your_name;

		
?>