<?php

$dsn="mysql:host=localhsot;dbname=lamp87";

$user="root";

$passwd="123";

$m = new PDO($dsn,$user,$passwd);

$stmt = $m->query("select * from stu");

$rows = $stmt->fetchAll();

var_dump($rows);

?>

<?php

$dsn="pgsql:host=localhost;port=5432;dbname=lamp87;user=postgres;password=123456";

$m = new PDO($dsn);

$stmt = $m->query("select * from stu");

$rows = $stmt->fetchAll();

var_dump($rows);

?>