Error to connect to MySQL database

Question

I am a beginner in php, and for a project I want to connect me with my database but the problem is :

I need 4 variables:

$serveurname
$username
$password
$databasename

When i do :

$link = new mysqli($servername,$username,$password)

There are two errors :

Warning: mysqli::mysqli(): php_network_getaddresses: getaddrinfo failed: Name or service not known in /home/ubuntu/workspace/index.php on line 21

and

Warning: mysqli::mysqli(): (HY000/2002): php_network_getaddresses: getaddrinfo failed: Name or service not known in /home/ubuntu/workspace/index.php on line 21

I think the problem is : serveurname information is bad but I don't know where can I find it on phpmyadmin?

On phpmyadmin i see :

MySQL
Serveur: info-arie.iut.bx1 via TCP/IP
Version du serveur: 5.5.43-0+deb7u1
Version du protocole: 10
Utilisateur: dfrances@info-morgane.iut.bx1
Jeu de caractères pour MySQL: UTF-8 Unicode (utf8)

but information (at right of the screen on phpmyadmin) seems bad because in my code I have :

$servername = "info-arie.iut.bx1"; 
$username = "dfrances@info-morgane.iut.bx1";

Answer 1

You can find phpmyadmin mysql connection info in file config.inc.php inside the phpmyadmin folder. Find entries like the following and use it for your code.

$cfg['Servers'][$i]['host'] = 'localhost';
$cfg['Servers'][$i]['user'] = 'someuser';
$cfg['Servers'][$i]['password'] = 'somepass'; 

Answer 2

根据错误消息，运行PHP脚本的主机无法联系数据库服务器。