# PDO_MYSQL DSN

(PECL PDO_MYSQL >= 0.1.0)

PDO_MYSQL DSN — Connecting to MySQL databases

### 说明

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

DSN prefix

  The DSN prefix is `mysql:`.

`host`

  The hostname on which the database server resides.

`port`

  The port number where the database server is listening.

`dbname`

  The name of the database.

`unix_socket`

  The MySQL Unix socket (shouldn't be used with `host` or `port`).

`charset`

  The character set. See the character set concepts documentation for more information.

### 示例

示例 #1 PDO_MYSQL DSN examples

The following example shows a PDO_MYSQL DSN for connecting to MySQL databases:

    mysql:host=localhost;dbname=testdb

More complete examples:

    mysql:host=localhost;port=3307;dbname=testdb
    mysql:unix_socket=/tmp/mysql.sock;dbname=testdb

### 注释

> 注意: Unix only:

> When the host name is set to `"localhost"`, then the connection to the server is made through a domain socket. If PDO_MYSQL is compiled against libmysqlclient then the location of the socket file is at libmysqlclient's compiled in location. If PDO_MYSQL is compiled against mysqlnd a default socket can be set through the pdo_mysql.default_socket setting.

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