PDO_MYSQL DSN

(PECL PDO_MYSQL >= 0.1.0)

PDO_MYSQL DSNConnecting to MySQL databases

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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.

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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

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Note: Unix only:

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.

User Contributed Notes

FireDev 05-Feb-2020 05:32
The best way for me

$bdd= new PDO("mysql:host=localhost;dbname=test_db;charset=UTF8", "username", "password");
$bdd->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_WARNING);
divinity76 at gmail dot com 13-Oct-2019 04:07
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
));
yuqiangliu at outlook dot com 23-Apr-2019 09:40
$options = array(
    PDO::MYSQL_ATTR_INIT_COMMAND => 'SET NAMES utf8',
);

SET NAMES utf8 is equivalent to

SET character_set_client = utf8;
SET character_set_results = utf8;
SET character_set_connection = utf8;
rhian 02-Dec-2016 03:13
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
xwisdom at gmail dot com 07-Dec-2015 11:11
If you are having problems accessing a remote MYSQL database, the solution is to make sure that you remove any white-space after "mysql:"

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

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

See original solution here:
http://stackoverflow.com/a/25432156
siguza at siguza dot net dot IGNORETHIS 04-Jan-2015 02:24
It should be noted that unix_socket can also be used for named pipes under Windows.

<?php
$pipeName
= 'my_awesome_pipe';
$username = 'username';
$password = 'password';
$dbh = new PDO('mysql:unix_socket='.$pipeName, $username, $password);
?>
codeslinger at compsalot dot com 11-Mar-2009 03:00
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.