(PHP 4 <= 4.1.0, PECL dbplus >= 0.9)
dbplus_getunique — Get an id number unique to a relation
$relation
   , int $uniqueid
   )
   Obtains a number guaranteed to be unique for the given
   relation and will pass it back in the variable
   given as uniqueid.
  
   Returns DBPLUS_ERR_NOERR on success or a db++ error
   code on failure. 
  
This function is EXPERIMENTAL. The behaviour of this function, its name, and surrounding documentation may change without notice in a future release of PHP. This function should be used at your own risk.