# PDO_PGSQL DSN

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

PDO_PGSQL DSN — Connecting to PostgreSQL databases

### 说明

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. Supported values and their meaning are listed in the » PostgreSQL Documentation.

> 注意: 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.

### 示例

示例 #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

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