如何从xampp

Question

我在htdocs中有一个项目，我有一个文件connect.php 我试图连接到我们网站的数据库，因为我会在那里插入东西，但我无法以某种方式连接到数据库。

$servername = "http://websitename.com";
$username = "root";
$password = "websitepassword";

try {
    $conn = new PDO("mysql:host=$servername;dbname=coverview", $username, $password);
    // set the PDO error mode to exception
    $conn->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
    echo "Connected successfully"; 
    }
catch(PDOException $e)
    {
    echo "Connection failed: " . $e->getMessage();
    }



    $resulttwo = $conn->prepare("SELECT * FROM tablename;");
$resulttwo->execute();

while ($rowtwo = $resulttwo->fetch(PDO::FETCH_ASSOC))
{
    echo $rowtwo['fieldname'];
}

不知怎的，它没有连接。这就是结果。

Warning: PDO::__construct(): php_network_getaddresses: getaddrinfo failed: No such host is known. in C:\xampp\htdocs\play2winsychronizer\connect.php on line 15
Connection failed: SQLSTATE[HY000] [2002] A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond. 
Notice: Undefined variable: conn in C:\xampp\htdocs\play2winsychronizer\connect.php on line 27

Fatal error: Call to a member function prepare() on null in C:\xampp\htdocs\play2winsychronizer\connect.php on line 27

当我使用我们网站的公共IP作为主持人而不是＆＃34; http://website.com/＆＃34;

这部分错误消失了：

  

警告：PDO :: __ construct（）：php_network_getaddresses：getaddrinfo failed：没有这样的主机。在第15行的C：\ xampp \ htdocs \ play2winsychronizer \ connect.php

注意：我在xampp中，如果我使用localhost，我将连接到我不想要的本地数据库。我想连接到网站的数据库。

Answer 1

您需要将服务器上的本地公共IP地址列入白名单。如果你有cPanel就有它的相似之处。默认情况下，大多数服务器仅配置为接受来自localhost的连接。