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PHP Manual

## Runtime Configuration

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

InterBase configuration options
Name | Default | Changeable | Changelog
--- | --- | --- | ---
ibase.allow_persistent | "1" | PHP_INI_SYSTEM |
ibase.max_persistent | "-1" | PHP_INI_SYSTEM |
ibase.max_links | "-1" | PHP_INI_SYSTEM |
ibase.default_db | NULL | PHP_INI_SYSTEM | Available since PHP 5.0.0.
ibase.default_user | NULL | PHP_INI_ALL |
ibase.default_password | NULL | PHP_INI_ALL |
ibase.default_charset | NULL | PHP_INI_ALL | Available since PHP 5.0.0.
ibase.timestampformat | "%Y-%m-%d %H:%M:%S" | PHP_INI_ALL |
ibase.dateformat | "%Y-%m-%d" | PHP_INI_ALL |
ibase.timeformat | "%H:%M:%S" | PHP_INI_ALL |

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.

`ibase.allow_persistent` boolean

  Whether to allow persistent connections to Firebird/InterBase.

`ibase.max_persistent` integer

  The maximum number of persistent Firebird/InterBase connections per process. New connections created with ibase_pconnect() will be non-persistent if this number would be exceeded.

`ibase.max_links` integer

  The maximum number of Firebird/InterBase connections per process, including persistent connections.

`ibase.default_db` string

  The default database to connect to when ibase_[p]connect() is called without specifying a database name. If this value is set and SQL safe mode is enabled, no other connections than to this database will be allowed.

`ibase.default_user` string

  The user name to use when connecting to a database if no user name is specified.

`ibase.default_password` string

  The password to use when connecting to a database if no password is specified.

`ibase.default_charset` string

  The character set to use when connecting to a database if no character set is specified.

`ibase.timestampformat` string

`ibase.dateformat` string

`ibase.timeformat` string

  These directives are used to set the date and time formats that are used when returning dates and times from a result set, or when binding arguments to date and time parameters.

Installation
Resource Types
Installing/Configuring
PHP Manual