So, I thought of sharing my /etc/odbc.ini and /etc/odbcinst.ini since I had a bit of hard time writing them. It may help someone who is trying to figure out how to connect using ODBC on Linux.

Packages Required on CentOS

httpd php unixODBC

Manually Install Oracle Instant Client 11.1 RPM Packages and Install Sybase ASE from the TGZ File.

For Oracle you need to copy all the libs to /usr/lib

cp /usr/lib/oracle/11.1/client/lib /usr/lib/

/etc/odbcinst.ini Contents:

[Oracle]
Description     = Oracle ODBC Connection
Driver          = /usr/lib/oracle/11.1/client/lib/libsqora.so.11.1
Setup           =
FileUsage =
CPTimeout =
CPReuse         =

[Sybase]
Description = Sybase ODBC Driver
Driver = /opt/sybase/DataAccess/ODBC/lib/libsybdrvodb.so
FileUsage = -1

/etc/odbc.ini Contents:

[Oracle]
Application Attributes = T
Attributes = W
BatchAutocommitMode = IfAllSuccessful
CloseCursor = F
DisableDPM = F
DisableMTS = T
Driver = Oracle
EXECSchemaOpt =
EXECSyntax = T
Failover = T
FailoverDelay = 10
FailoverRetryCount = 10
FetchBufferSize = 64000
ForceWCHAR = F
Lobs = T
Longs = T
MetadataIdDefault = F
QueryTimeout = T
ResultSets = T
ServerName = //serverip:port/dbname
SQLGetData extensions = F
Translation DLL =
Translation Option = 0
UserID =

[Sybase]
Driver = Sybase
Server = serverip
Port = serverport
Database = dbname

PHP Script to Test ODBC Connectivity:

<?php

$query = “select * from table_name”;

$conn = odbc_pconnect(“DSN”, “username”, “password”);

if(!$conn) die(“Connection failed”);

if($result = odbc_exec($conn, $query)) {

echo “Query returned : ” . odbc_num_rows($result) . “rows”;

odbc_result_all($result);

}

?>