Returns an ODBC connection id or 0 (FALSE) on error.
The connection id returned by this functions is needed
by other ODBC functions. You can have multiple connections
open at once. The optional fourth parameter sets the type of
cursor to be used for this connection. This parameter is not
normally needed, but can be useful for working around
problems with some ODBC drivers.
With some ODBC drivers, executing a complex stored
procedure may fail with an error similar to: "Cannot open a
cursor on a stored procedure that has anything other than a
single select statement in it". Using SQL_CUR_USE_ODBC may
avoid that error. Also, some drivers don't support the
optional row_number parameter in
odbc_fetch_row(). SQL_CUR_USE_ODBC might help in that
case, too.
The following constants are defined for cursortype:
For persistent connections see
odbc_pconnect().