MySQL and PHP
Copyright 1997-2021 the PHP Documentation Group.
PDO_MYSQL DSN
Connecting to MySQL databases
The PDO_MYSQL Data Source Name (DSN) is composed of the following elements:
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.
Example 4.2 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
When the host name is set to
"localhost", then the connection to
the server is made thru 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 thru the
pdo_mysql.default_socket setting.