PDO_MYSQL DSN

(PECL PDO_MYSQL >= 0.1.0)

PDO_MYSQL DSNConnexion aux bases de données MySQL

Description

Le Data Source Name (DSN) de PDO_MYSQL est composé des éléments suivants :

Préfixe DSN

Le préfixe DSN est mysql:.

host

L'hôte sur lequel le serveur de base de données se situe.

port

Le numéro de port où le serveur de base de données est en train d'écouter.

dbname

Le nom de la base de données.

unix_socket

Le socket Unix MySQL (ne devrait pas être utilisé avec host ou port).

charset

Le jeu de caractères. Voir la documentation sur les concepts des jeux de caractères pour plus d'informations.

Exemples

Exemple #1 Exemples avec le DSN de PDO_MYSQL

L'exemple suivant montre le DSN PDO_MYSQL pour se connecter aux bases de données MySQL :

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

Notes

Note: Unix seulement:

Lorsque le nom d'hôte est "localhost", la connexion est faite par un socket Unix. Si PDO_MYSQL est compilé avec libmysqlclient, alors le fichier de socket est celui précisé à la compilation de libmysqlclient. Si PDO_MYSQL est compilé avec mysqlnd, un socket par défaut peut être indiqué via la paramètre pdo_mysql.default_socket.

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User Contributed Notes 8 notes

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36
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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8
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
up
1
FireDev
4 years ago
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);
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1
divinity76 at gmail dot com
5 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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0
anrdaemon at yandex dot ru
2 years ago
Wrappers may add support for extra parameters in the DSN, which are ignored by PDO itself, but facilitate more fine-grained connection setup.

F.e. localization (particularly LC_TIME) and timezones support.

https://github.com/AnrDaemon/library-php/blob/335e9e58f22cca8c185b35cf201ad0a367ae4c9f/src/Wrappers/PDOMysql.php#L54-L69
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0
siguza at siguza dot net dot IGNORETHIS
9 years ago
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);
?>
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-7
yuqiangliu at outlook dot com
5 years ago
$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;
up
-14
xwisdom at gmail dot com
8 years ago
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
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