yaz_error
    (PHP 4 >= 4.0.1, PECL)
yaz_error -- Returns error description
Description
string 
yaz_error ( resource id )
   yaz_error() returns an English text message
   corresponding to the last error number as returned by
   yaz_errno().
  
Return Values
   Returns an error text message for server (last request), identified by
   parameter id. An empty string is returned if the
   last operation was successful.