“连接被拒绝”或“没有此类文件或目录”

我有一个 website 由DreamHost托管。子域“fakestore”有一个数据库,因此有一个访问该数据库的脚本。然而,我无法使该数据库正常工作。我试过换衣服 $servername 到 127.0.0.1 ,和至 aashishbharadwaj.com 。如果使用localhost,则会出现错误 It no work!SQLSTATE[HY000] [2002] No such file or directory .如果我用另外两个 It no work!SQLSTATE[HY000] [2002] Connection refused 。

<?php
    $servername = 'localhost';   //I've tried numerous things here, with different errors

    //For my server
    $username = "username";   //Not actual username
    $password = "password";   //Not actual password

    $dbname = 'database_name';   //Not actual database name

    try {
        $db = new PDO("mysql:host=$servername;dbname=$dbname", $username, $password);
    } catch (PDOException $e) {
        $error_message = $e->getMessage();
        echo "It no work!";
        echo $error_message;
        exit();
    }
?>