Installation

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 Installation of PECL extensions 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.

Note: Note for IIS
users

If you are using the ibm_db2 driver with Microsoft
Internet Information Server (IIS) you may have to do the
following:

• Install DB2 with extended operating system
  security.
• Add the PHP binary path to the PATH system environment variable (default
  C:\php\).
• Create another system environment variable equal
  to the path where the PHP.INI file is located (eg: PHPRC =
  C:\php\).
• Add the IUSR_COMPUTERNAME to the DB2USERS
  group.