PDO_PGSQL DSN

(PHP 5 >= 5.1.0, PHP 7, PECL PDO_PGSQL >= 0.1.0)

PDO_PGSQL DSN — Connecting to PostgreSQL databases

Description

The PDO_PGSQL Data Source Name (DSN) is composed of the following elements, delimited by spaces or semicolons:

DSN prefix: The DSN prefix is pgsql:.
host: The hostname on which the database server resides.
port: The port on which the database server is running.
dbname: The name of the database.
user: The name of the user for the connection. If you specify the user name in the DSN, PDO ignores the value of the user name argument in the PDO constructor.
password: The password of the user for the connection. If you specify the password in the DSN, PDO ignores the value of the password argument in the PDO constructor.
sslmode: The SSL mode. Accepted values are disable, allow, prefer, require, verify-ca, and verify-full; their meaning is described in the » PostgreSQL Documentation. Many hosted PostgreSQL services require an encrypted connection, so require or stricter is needed to connect to them.

Note:
As of PHP 8.4.0, credentials specified in the DSN (user and password) take priority over the corresponding arguments passed to the PDO constructor. In earlier versions, the PDO constructor arguments took precedence.

Note:
All semicolons in the DSN string are replaced by spaces, because PostgreSQL expects this format. This implies that semicolons in any of the components (e.g. password or dbname) are not supported.

Examples

Example #1 PDO_PGSQL DSN examples

The following example shows a PDO_PGSQL DSN for connecting to a PostgreSQL database:

pgsql:host=localhost;port=5432;dbname=testdb;user=bruce;password=mypass

The following example shows a PDO_PGSQL DSN for connecting to a PostgreSQL database via unix socket /tmp/.s.PGSQL.5432:

pgsql:host=/tmp;port=5432;dbname=testdb;user=bruce;password=mypass