Parse error: syntax error, unexpected T_ENCAPSED_AND_WHITESPACE (Opgelost)

<?php 
// Kijken of de gebruiker al reeds ingelogd is 

if(isset($_SESSION['login']) && $_SESSION['login'] == true){ 
    echo $lang['reg_loged_in']; 
    sleep(3); 
    header("Location: $site_url"); 
    die(); 
//Nog geen gebruiker ingelogd, dus kan hij registreren 

}else{ 
     
     
    //Alles toevoegen aan database 
[b](REGEL 15)[/b]    $qry_add_user = mysql_query("INSERT INTO 
                     users  
                         (username,  
                         password,  
                         email,  
                         validation_key,  
                         reg_time)  
                     VALUES  
                     ('".$_SESSION['txt_username']."',  
                     '".$_SESSION['txt_password']."',  
                     '".$_SESSION['txt_email']."',  
                     '".$val_key."',  
                     '".$date_time."') 
                ") or die (mysql_error()); 
     
    // Id van de gebruiker die net toegevoegd is uit database halen 
    $array_id = mysql_query("SELECT * FROM  
                                users  
                                    WHERE  
                                    username='".$_SESSION['txt_nickname']."'  
                                    AND  
                                    password='".$_SESSION['txt_password']."'" 
                            ) or die (mysql_error()); 
    $array_id = mysql_fetch_array($array_id); 
    $user_id = $array_id['id']; 
    session_register('user_id'); 
    session_register('val_key'); 
    header("Location: $site_url?m=registreer&m_n=mail"); 
    die(); 
} 
?>

<?php 
// Kijken of de gebruiker al reeds ingelogd is 
 
if(isset($_SESSION['login']) && $_SESSION['login'] == true){ 
    echo $lang['reg_loged_in']; 
    sleep(3); 
    header("Location: $site_url"); 
    die(); 
//Nog geen gebruiker ingelogd, dus kan hij registreren 
 
}else{ 
 
 
    //Alles toevoegen aan database 
[b](REGEL 15)[/b]    $qry_add_user = mysql_query("INSERT INTO 
                     users  
                         (username,  
                         password,  
                         email,  
                         validation_key,  
                         reg_time)  
                     VALUES  
                     ('".$_SESSION['txt_username']."',  
                     '".$_SESSION['txt_password']."',  
                     '".$_SESSION['txt_email']."',  
                     '".$val_key."',  
                     '".$date_time."') 
                ") or die (mysql_error()); 
 
    // Id van de gebruiker die net toegevoegd is uit database halen 
    $array_id = mysql_query("SELECT * FROM  
                                users  
                                    WHERE  
                                    username='".$_SESSION['txt_nickname']."'  
                                    AND  
                                    password='".$_SESSION['txt_password']."'" 
                            ) or die (mysql_error()); 
    $array_id = mysql_fetch_array($array_id); 
    $user_id = $array_id['id']; 
    session_register('user_id'); 
    session_register('val_key'); 
    header("Location: $site_url?m=registreer&m_n=mail"); 
    die(); 
} 
?>