PDO_MYSQL DSN

(PECL PDO_MYSQL >= 0.1.0)

PDO_MYSQL DSNConnecting to MySQL databases

Descrizione

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.

Esempi

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

Note

Nota: 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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User Contributed Notes 3 notes

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40
codeslinger at compsalot dot com
15 years ago
I have tested this and found that the "dbname" field is optional. Which is a good thing if you must first create the db.

After creating a db be sure to exec a "use dbname;" command, or else use fully specified table references.
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7
rhian
7 years ago
xwisdom made a mistake in his comment and got it backwards, correction below:

If you are having problems accessing a remote MYSQL database, the solution is to make sure that you add a white-space after "mysql:"

Change this...:
mysql:host=remote;

...to this:
mysql: host=remote;

See original solution here:
http://stackoverflow.com/a/25432156
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-1
divinity76 at gmail dot com
4 years ago
here is the example i prefer myself, in my opinion, this is almost always "the correct way" to do it:
<?php

$db
= new \PDO('mysql:host=localhost;dbname=testdb;charset=utf8mb4', 'username', 'password', array(
\PDO::ATTR_EMULATE_PREPARES => false,
\PDO::ATTR_ERRMODE => \PDO::ERRMODE_EXCEPTION
));
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