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.
PDO_MYSQL DSN
(PECL PDO_MYSQL >= 0.1.0)
PDO_MYSQL DSN — Connexion 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
hostouport). -
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
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 aveclibmysqlclient, alors le fichier de socket est celui précisé à la compilation delibmysqlclient. Si PDO_MYSQL est compilé avecmysqlnd, un socket par défaut peut être indiqué via la paramètre pdo_mysql.default_socket.
add a note
User Contributed Notes 8 notes
codeslinger at compsalot dot com ¶
15 years ago
rhian ¶
8 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
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);
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
));
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
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);
?>
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;
xwisdom at gmail dot com ¶
9 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
