(PHP 3 >= 3.0.6, PHP 4, PHP 5)
odbc_longreadlen -- Handling of LONG columns
Description
bool 
odbc_longreadlen ( resource result_id, int length )
     (ODBC SQL types affected: LONG, LONGVARBINARY) The number of
     bytes returned to PHP is controlled by the parameter length. If it
     is set to 0, Long column data is passed through to the
     client.
    
Note:  
      Handling of LONGVARBINARY columns is also affected by
      odbc_binmode().