Installation
Resource Types
Installing/Configuring
PHP Manual

## Runtime Configuration

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

ibm_db2 Configure Options
Name | Default | Changeable | Changelog
--- | --- | --- | ---
ibm_db2.binmode | "1" | PHP_INI_ALL |
ibm_db2.i5_all_pconnect | "0" | PHP_INI_SYSTEM | Available since ibm_db2 1.6.5.
ibm_db2.i5_allow_commit | "0" | PHP_INI_SYSTEM | Available since ibm_db2 1.4.9.
ibm_db2.i5_dbcs_alloc | "0" | PHP_INI_SYSTEM | Available since ibm_db2 1.5.0.
ibm_db2.instance_name | NULL | PHP_INI_SYSTEM | Available since ibm_db2 1.0.2.
ibm_db2.i5_ignore_userid | "0" | PHP_INI_SYSTEM | Available since ibm_db2 1.8.0.

Here's a short explanation of the configuration directives.

`ibm_db2.binmode` integer

  This option controls the mode used for converting to and from binary data in the PHP application.

  - 1 (DB2_BINARY)

  - 2 (DB2_CONVERT)

  - 3 (DB2_PASSTHRU)

`ibm_db2.i5_all_pconnect` integer

  This option overrides i5 db2_connect() full open and close in the PHP application. When `ibm_db2.i5_all_pconnect` = 1, all db2 connections become persistent (db2_pconnect()). On i5/OS, db2_pconnect() performs dramatically better with lower machine stress over db2_connect(). This is a convenience override of db2_connect() to evoke db2_pconnect() without PHP source code changes.

  - 0 db2_connect() default full open and close

  - 1 db2_connect() override to db2_pconnect() for persistent connection only

`ibm_db2.i5_allow_commit` integer

  This option controls the commit mode used for i5 schema collections in the PHP application.

  - 0 no commit (see `i5_commit` for override)

  - 1 allow commit (see `i5_commit` for override)

`ibm_db2.i5_dbcs_alloc` integer

  This option controls the internal ibm_db2 allocation scheme for large DBCS column buffers.

  - 0 no expanded allocations (see `i5_dbcs_alloc` for override)

  - 1 use expanded allocations (see `i5_dbcs_alloc` for override)

`ibm_db2.instance_name` string

  On Linux and UNIX operating systems, this option defines the name of the instance to use for cataloged database connections. If this option is set, its value overrides the DB2INSTANCE environment variable setting.

  This option is ignored on Windows operating systems.

`ibm_db2.i5_ignore_userid` integer

  This option overrides i5 db2_(p)connect userid and password in the PHP application. When `ibm_db2.i5_ignore_userid` = 1, all db2 (p)connections become null userid and null password. Therefore Apache jobs connect with the current profile (NOBODY). Use of this override is only for simple DB2 based websites that never require profile switching and therefore can avoid all overhead of server mode additional QSQSRVR jobs. This is a convenience override of db2_(p)connect to set the userid and password values to null without PHP source code changes. This override can be used in combination with `ibm_db2.i5_all_pconnect` = 1.

  - 0 db2_(p)connect with specified userid and password

  - 1 db2_(p)connect override connect with null userid and null password

Installation
Resource Types
Installing/Configuring
PHP Manual