PHP Manual

Runtime Configuration

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

**Unified ODBC Configuration Options**
Name	Default	Changeable	Changelog
odbc.default_db *	NULL	PHP_INI_ALL
odbc.default_user *	NULL	PHP_INI_ALL
odbc.default_pw *	NULL	PHP_INI_ALL
odbc.allow_persistent	"1"	PHP_INI_SYSTEM
odbc.check_persistent	"1"	PHP_INI_SYSTEM
odbc.max_persistent	"-1"	PHP_INI_SYSTEM
odbc.max_links	"-1"	PHP_INI_SYSTEM
odbc.defaultlrl	"4096"	PHP_INI_ALL
odbc.defaultbinmode	"1"	PHP_INI_ALL
odbc.default_cursortype	"3"	PHP_INI_ALL	Available as of PHP 5.3.0

Note: Entries marked with * are not implemented yet.

For further details and definitions of the PHP_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 boolean: Whether to allow persistent ODBC connections.
odbc.check_persistent boolean: Check that a connection is still valid before reuse.
odbc.max_persistent integer: The maximum number of persistent ODBC connections per process.
odbc.max_links integer: The maximum number of ODBC connections per process, including persistent connections.
odbc.defaultlrl integer: Handling of LONG fields. Specifies the number of bytes returned to variables.
When an integer is used, the value is measured in bytes. Shorthand notation, as described in this FAQ, may also be used.
odbc.defaultbinmode integer: Handling of binary data.
odbc.default_cursortype integer: Controls the ODBC cursor model. Possible values are SQL_CURSOR_FORWARD_ONLY, SQL_CURSOR_KEYSET_DRIVEN, SQL_CURSOR_DYNAMIC and SQL_CURSOR_STATIC (default).