These functions enable you to access IBM DB2 Universal Database, IBM Cloudscape, and Apache Derby databases using the DB2 Call Level Interface (DB2 CLI).
To connect to IBM DB2 Universal Database for Linux, UNIX, and Windows, or IBM Cloudscape, or Apache Derby, you must install an IBM DB2 Universal Database client on the same computer on which you are running PHP. The extension has been developed and tested with DB2 Version 8.2.
To connect to IBM DB2 Universal Database for z/OS or iSeries, you also require IBM DB2 Connect or the equivalent DRDA gateway software.
The user invoking the PHP executable or SAPI must specify the DB2 instance
before accessing these functions. You can set the name of the DB2 instance
in php.ini using the ibm_db2.instance_name
configuration option, or you can source the DB2 instance profile before
invoking the PHP executable.
If you created a DB2 instance named db2inst1 in
/home/db2inst1/, for example, you can add the
following line to php.ini:
ibm_db2.instance_name=db2inst1
If you do not set this option in php.ini, you must issue the
following command to modify your environment variables to enable access to
DB2:
bash$ source /home/db2inst1/sqllib/db2profile
To enable your PHP-enabled Web server to access these functions, you must
either set the ibm_db2.instance_name configuration
option in php.ini, or source the DB2 instance environment in your Web
server start script (typically /etc/init.d/httpd or
/etc/init.d/apache).
To build the ibm_db2 extension, the DB2 application development header files and libraries must be installed on your system. DB2 does not install these by default, so you may have to return to your DB2 installer and add this option. The header files are included with the DB2 Application Development Client freely available for download from the IBM DB2 Universal Database » support site.
If you add the DB2 application development header files and libraries to a Linux or Unix operating system on which DB2 was already installed, you must issue the command db2iupdt -e to update the symbolic links to the header files and libraries in your DB2 instances.
ibm_db2 is a » PECL extension, so follow the instructions in 第 5 章 PECL 扩展库安装 to install the ibm_db2 extension for PHP. Issue the configure command to point to the location of your DB2 header files and libraries as follows:
bash$ ./configure --with-IBM_DB2=/path/to/DB2
The configure command defaults to
/opt/IBM/db2/V8.1.
这些函数的行为受 php.ini 的影响。
| 名字 | 默认 | 可修改范围 | Changelog |
|---|---|---|---|
| ibm_db2.binmode | "1" | PHP_INI_ALL | |
| ibm_db2.instance_name | NULL | PHP_INI_SYSTEM |
以下是配置选项的简要解释。
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)
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.
以下常量由本扩展模块定义，因此只有在本扩展模块被编译到 PHP 中，或者在运行时被动态加载后才有效。
DB2_BINARY
(integer)
DB2_CONVERT
(integer)
DB2_PASSTHRU
(integer)
NULL value.
DB2_SCROLLABLE
(integer)
DB2_FORWARD_ONLY
(integer)
DB2_PARAM_IN
(integer)
DB2_PARAM_OUT
(integer)
DB2_PARAM_INOUT
(integer)
DB2_PARAM_FILE
(integer)
DB2_AUTOCOMMIT_ON
(integer)
DB2_AUTOCOMMIT_OFF
(integer)
DB2_DOUBLE
(integer)
DB2_LONG
(integer)
DB2_CHAR
(integer)
The ibm_db2 extension returns connection resources, statement resources, and result set resources.
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