first I used this script :

if (!$config) {
  $theroot="/usr/local/etc/httpd/sites/idm-conseil.com"; 
  $euro=6.55957; //conversion euro vers francs
  include "phlib/db_mysql.inc";
  include "phlib/db_usql.inc";
  include "phlib/table.inc";
  include "phlib/tmpl_table.inc";
  include "epa/listbox.inc";
  include "epa/checkboxes.inc";
  $config=1;

Class DB_DH extends DB_USql {
  var $Host     = "";         
  var $Database = "directhotel";      
  var $User     = "root";            
  var $Password = "";

}

} // fin if (!$config)

the class DB_DH register but the variable are blank when I instantiate an object.

then I modified to this one

  $theroot="/usr/local/etc/httpd/sites/idm-conseil.com"; 
  $euro=6.55957; //conversion euro vers francs
  include "phlib/db_mysql.inc";
  include "phlib/db_usql.inc";
  include "phlib/table.inc";
  include "phlib/tmpl_table.inc";
  include "epa/listbox.inc";
  include "epa/checkboxes.inc";

Class DB_DH extends DB_USql {
  var $Host     = "";         
  var $Database = "directhotel";      
  var $User     = "root";            
  var $Password = "";
}

and I only have a message saying that I had no data.

then I separated the class statement in one php include :

file local.inc contains :
Class DB_DH extends DB_USql {
  var $Host     = "";         
  var $Database = "directhotel";      
  var $User     = "root";            
  var $Password = "";
}

file config.inc contains:
  $theroot="/usr/local/etc/httpd/sites/idm-conseil.com"; 
  $euro=6.55957; //conversion euro vers francs
  include "phlib/db_mysql.inc";
  include "phlib/db_usql.inc";
  include "phlib/table.inc";
  include "phlib/tmpl_table.inc";
  include "epa/listbox.inc";
  include "epa/checkboxes.inc";
  include "local.inc";

and it works fine. but this is only a round away.

bye