HOW TO INSTALL PDO_IBM WITH PECL
This worked for me:
1. Download the latest PDO IBM driver file from http://pecl.php.net/package/PDO_IBM
EX: PDO_IBM-1.3.1.tgz
2. Untar the file: tar -xvf PDO_IBM-1.3.1.tgz
3. Go to the main directory (directory that contains the config.m4 file)
4. Execute 'phpize' and that creates several files. Note: must have php5-dev installed ( sudo apt-get install php5-dev )for phpize to run.
5. There is a bug in the configure script. It can't find necessary header files, so you have to put them in the correct directory.
- Create the following folder structure: php/ext/pdo/ in the PDO_IBM-1.3.1/include/ directory
- Copy all the *.h files from /usr/include/php5/ext/pdo to the new pdo directory you just created above
6. Execute './configure --with-pdo-ibm=/home/db2inst1/sqllib'
7. Execute 'make'
8. Execute 'sudo make install'
9. Modify the /etc/apache2/php.ini file in order to activate the pdo_ibm.so extension.
extension=pdo_ibm.so
10. Restart Apache. (sudo service apache2 restart)