PHP Manual: PDO

Description

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.
user: The name of the user for the connection. A user name given as the second argument to the PDO constructor takes precedence over one specified in the DSN.
password: The password of the user for the connection. A password given as the third argument to the PDO constructor takes precedence over one specified in the DSN.
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.

Examples

Example #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

Notes

Note: 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.