Cannot connect to database with PDO

Question

I've got the following code:

try {
    $db = new PDO('mysql:host=127.0.0.1;db=example', 'root', '');
    $db->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);

    $stmt = $db->query('SELECT * FROM posts');


} catch (PDOException $e) {

    echo $db->errorCode();
    var_dump($db->errorInfo());

}

And I get the following error:

3D000array(3) { [0]=> string(5) "3D000" [1]=> int(1046) [2]=> string(20) "No database selected" }

However, this ONLY occurs when I include $stmt = $db->query('SELECT * FROM posts');

This is my first time with PDO, Would anyone know why this is not working? The database and table exist.

Answer 1

You have:

db=example

You need:

dbname=example

Sadly, there's no way to get an error message or notification of any kind if you mistype a DSN parameter.

Available parameters are documented at PDO_MYSQL DSN.

Answer 2

dname and not only db

try {
    $db = new PDO('mysql:host=127.0.0.1;dbname=example', 'root', '');
    $db->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);

    $stmt = $db->query('SELECT * FROM posts');


} catch (PDOException $e) {

    echo $db->errorCode();
    var_dump($db->errorInfo());

}

http://www.php.net/manual/fr/book.pdo.php