如何使用 PHP 连接到 db4free.net 数据库？

Question

I made a db on db4free.net, and I want to connect to it with php:

$username = myusername; 
$password = mypw; 
$host = "db4free.net:3306"; 
$dbname = mydbname; 

$options = array(PDO::MYSQL_ATTR_INIT_COMMAND => 'SET NAMES utf8'); 

try 
{ 
    $db = new PDO("mysql:host={$host};dbname={$dbname};charset=utf8", $username, $password, $options); 
} 
catch(PDOException $ex) 
{ 
    die("Failed to connect to the database: " . $ex->getMessage()); 
} 

And I get this error message: Failed to connect to the database: SQLSTATE[HY000] [2005] Unknown MySQL server host

So I was thinking , that the hostname is wrong, so i tried to varie it a bit (adding /dbname or /username or removing the port, ect.). I've tried all the combinations, but none of them worked. The login data are checked multiple times. What could be the problem?

Answer 1

我尝试使用这个代码，它对我有用

$host = "85.10.205.173:3306"; 

Answer 2

这对我有用......

$host = "db4free.net"; 

Answer 3

This may be too late to post an answer to this question.

But I hope this would help anyone who comes searching a solution for a connection failure or access denial just as me.

db4free.net while having database listening on the port 3306, they provide mysql servers on some other ports as well. When creating your account make sure to keep in mind the server you selected.

As in my case, my account was created on their newly set up mysql 8 server and it runs on the port 3307

Answer 4

host = "db4free.net" 
mysql = "8.0.16"
port = "3306"

Answer 5

Don't set the port at the end of the hostname. 3306 is indeed the default port for mysql connection anyway.