Oracle (PDO)
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PDO_OCI DSN — Connecting to Oracle databases


The PDO_OCI Data Source Name (DSN) is composed of the following elements:

DSN prefix

The DSN prefix is oci: .

dbname (Oracle Instant Client)

The URI for the Oracle Instant Client connection takes the form of dbname=//hostname:port-number/database. If you are connecting to a database defined in tnsnames.ora, use only the name of the database: dbname=database.


The client-side character set for the current environment handle.


Example#1 PDO_OCI DSN examples

The following examples show a PDO_OCI DSN for connecting to Oracle databases:

// Connect to a database defined in tnsnames.ora oci:dbname=mydb // Connect using the Oracle Instant Client oci:dbname=//localhost:1521/mydb

Oracle (PDO)
PHP Manual