PHP Connection to DB2 - php

Question

I am trying to connect a database from php script.
<?php
$database = '****';
$user = '*****';
$password = '******';
$hostname = '********';
$port = 50000;
$conn_string = "DRIVER={IBM DB2 ODBC DRIVER};DATABASE=$database;" .
"HOSTNAME=$hostname;PORT=$port;PROTOCOL=TCPIP;UID=$user;PWD=$password;";
$conn = db2_connect($conn_string, '', '');
if ($conn) {
echo "Connection succeeded.";
db2_close($conn);
}
else {
echo "Connection failed.";
}
?>
I am geting the following error.
Call to undefined function db2_connect() in /home/s1.php on line 10
Can somebody Help me out how to resolve the following.

Answer 1

I think, you need to install DB2 extension.
Here is the link
http://php.net/manual/en/ibm-db2.installation.php

Answer 2

In addition to installing the db2 extension through PECL, you will need development header files and libraries downloaded on the system before running pecl install.
Here is a shell script that creates 3 files:
Dockerfile
docker-compose.yml
html/index.php
Obviously, please read script before copy/pasting to ensure you're comfortable
with what it does, but in short, it uses cat and the heredoc syntax to output
text into files:
#! /bin/sh
cat << 'EOF' > docker-compose.yml
version: '3'
services:
odb-web:
build: .
ports:
- 3030:80
volumes:
- ./html:/var/www/html
mydb2:
image: ibmcom/db2
ports:
- 50000:50000
volumes:
- ./data:/database
environment:
LICENSE: accept
DB2INST1_PASSWORD: ChangeMe!
DBNAME: testdb
privileged: true
EOF
cat << 'EOF' > Dockerfile
FROM php:7.3-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: https://www.ibm.com/developerworks/downloads/im/db2express/index.html
# https://github.com/php/pecl-database-ibm_db2
# Download linuxx64_odbc_cli.tar.gz from https://public.dhe.ibm.com/ibmdl/export/pub/software/data/db2/drivers/odbc_cli/
## add header files and libraries
RUN mkdir -p /opt/ibm/ && curl https://public.dhe.ibm.com/ibmdl/export/pub/software/data/db2/drivers/odbc_cli/linuxx64_odbc_cli.tar.gz | tar -xz -C /opt/ibm/
# if you prefer to keep the file locally, download it and use:
# ADD odbc_cli/linuxx64_odbc_cli.tar.gz /opt/ibm/
## set env vars needed for PECL install
ENV IBM_DB_HOME=/opt/ibm/clidriver
ENV LD_LIBRARY_PATH=/opt/ibm/clidriver/lib
## install ibm_db2 drivers
RUN pecl install ibm_db2
RUN echo "extension=ibm_db2.so" > /usr/local/etc/php/conf.d/ibm_db2.ini
EOF
mkdir html && cat << 'EOF' > html/index.php
<?php
$database = 'testdb';
$user = 'db2inst1';
$password = 'ChangeMe!';
$hostname = 'host.docker.internal';
$port = 50000;
$conn_string = "DRIVER={IBM DB2 ODBC DRIVER};DATABASE=$database;" .
"HOSTNAME=$hostname;PORT=$port;PROTOCOL=TCPIP;UID=$user;PWD=$password;";
$conn = db2_connect($conn_string, '', '');
if ($conn) {
echo "Connection succeeded.\n";
db2_close($conn);
}
else {
echo "Connection failed.\n";
}
?>
EOF
upon running this script (or if on windows, copy pasting the file contents manually), you will have 3 files, and can run docker-compose up -d to build a php 7.3 image with apache and then it brings up two containers -- the php apache server and the ibm db2 database.
Browsing to http://localhost:3030 you should see "Connection succeeded".
You can modify the html/index.php file as desired and refresh the page to test things out.

Answer 3

just download a suitable version from PECL