Runtime Configuration

The behaviour of these functions is affected by settings in php.ini.

Unified ODBC Configuration Options

Name	Default	Changeable	Changelog
odbc.allow_persistent	"1"	INI_SYSTEM
odbc.check_persistent	"1"	INI_SYSTEM
odbc.max_persistent	"-1"	INI_SYSTEM
odbc.max_links	"-1"	INI_SYSTEM
odbc.defaultlrl	"4096"	INI_ALL
odbc.defaultbinmode	"1"	INI_ALL
odbc.default_cursortype	"3"	INI_ALL

For further details and definitions of the INI_* modes, see the Where a configuration setting may be set.

Here's a short explanation of the configuration directives.

odbc.default_db string

ODBC data source to use if none is specified in odbc_connect() or odbc_pconnect().

odbc.default_user string

User name to use if none is specified in odbc_connect() or odbc_pconnect().

odbc.default_pw string

Password to use if none is specified in odbc_connect() or odbc_pconnect().

odbc.allow_persistent bool

Whether to allow persistent ODBC connections.

odbc.check_persistent bool

Check that a connection is still valid before reuse.

odbc.max_persistent int

The maximum number of persistent ODBC connections per process.

odbc.max_links int

The maximum number of ODBC connections per process, including persistent connections.

odbc.defaultlrl int

Handling of LONG fields. Specifies the number of bytes returned to variables. See odbc_longreadlen() for details.

When an int is used, the value is measured in bytes. Shorthand notation, as described in this FAQ, may also be used.

odbc.defaultbinmode int

Handling of binary data. See odbc_binmode() for details.

odbc.default_cursortype int

Controls the ODBC cursor model. Possible values are SQL_CURSOR_FORWARD_ONLY, SQL_CURSOR_KEYSET_DRIVEN, SQL_CURSOR_DYNAMIC and SQL_CURSOR_STATIC (default).