ifxus_tell_slob
    (PHP 3>= 3.0.4, PHP 4 , PHP 5)
ifxus_tell_slob -- Returns the current file or seek position
Description
int 
ifxus_tell_slob ( int bid)
     Returns the current file or seek position of an open slob object
     bid should be an existing slob id.  Return
     FALSE on error otherwise the seek position.