php - 连接到数据库，包括 "mysql_select"转换为 pdo

Question

这是我连接到sql server的页面

<?php
$user="test";
$parola="test1";
$bazadate="test";  //Numele bazei de date sql//
$host="localhost"; //In general se foloseste localhost//
mysql_connect($host,$user,$parola);
@mysql_select_db($bazadate) or die( "Nu ma pot conecta la baza ta de date! <br/ > 
Sigur ai completat userul, parola si numele bazei de date?");
?>

我试过向下代码，但我收到“未选择数据库”:

<?php
/* SQL connect PDO */
$dsn = 'mysql:dbname=test;host=localhost';
$user = 'test';
$password = 'test1';

try {
$dbh = new PDO($dsn, $user, $password);

} catch (PDOException $e) {
echo 'Conectare SQL nereusita: ' . $e->getMessage();
}
?>

PDO 类(class)完全让我丧命......

Answer 1

在

$dsn = 'mysql:dbname=test;host=localhost';

参数顺序错误

订单在documentation是

$dbn = new PDO('mysql:host=$host;dbname=$bazadatet', $user, $parola);

在哪里

$user="test";
$parola="test1";    //table
$bazadate="test";  //Numele bazei de date sql//
$host="localhost"; //In general se foloseste localhost//

将顺序更改为 host & dbname