I found the problem. my server use php version 5.6, when i set the version til 5.4 it works.
Help I startet on another server and get this error
Teknisk information

Fejl type 2

Fejl forklaring Cannot modify header information - headers already sent by (output started at /home/www/toulstore.dk/include/dbconnection.my.mysql.php:12'>toulstore.dk/include/dbconnection.my.mysql.php:12)

URL www.toulstore.dk/Plan_list.php?

Fejl fil /home/www/toulstore.dk/include/commonfunctions.php'>toulstore.dk/include/commonfunctions.php

Fejl linie 3314

SQL forespørgelse

More info
Call stack

File: line Function Arguments

0. include/commonfunctions.php:3314 runner_error_handler 1. 2;

2. Cannot modify header information - headers already sent by (output started at /home/www/toulstore.dk/include/dbconnection.my.mysql.php:12'>toulstore.dk/include/dbconnection.my.mysql.php:12);
   
3. /home/www/toulstore.dk/include/commonfunctions.php'>toulstore.dk/include/commonfunctions.php;
   
4. 3314;
   
5. Array ( ) ;
   

   1. (null):0 header 1. Cache-Control: no-cache, no-store, max-age=0, must-revalidate;
   

   2. include/commonfunctions.php:3314 add_nocache_headers N/A
   

   3. Plan_list.php:6 Global scope N/A