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// working pdo example connection and fetching result on example of postgresql
$dbh = new PDO('pgsql:host=localhost;port=5432;dbname=edb', 'eizenuser',
    'eizenuser', [PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION]);
var_dump($dbh);
$res = $dbh->query('SELECT * FROM list');
var_dump($res->fetch());