Cannot connect to mysql database on my website - php

Question

I have a website that I should put on my domain.I have encountered an issue when I tried connecting to MySQL database so my code is not working. When I put
define("DB_HOST","http://domain");
define("DB_USER","user");
define("DB_PASS","password");
define("DB_NAME","dbName");
$connection = mysqli_connect(DB_HOST,DB_USER,DB_PASS,DB_NAME);
if(!$connection){
die();
}
mysqli_set_charset($connection,"utf8");
I get this error in log
Failed to connect to MySQL: Plugin http could not be loaded: /usr/lib64/mysql/plugin/http.so: cannot open shared object file: No such file or directory
otherwise, I tried to remove that HTTP and just use the domain as DB_HOST, but then I get error
define("DB_HOST","mydomain.com");
define("DB_USER","user");
define("DB_PASS","password");
define("DB_NAME","dbName");
$connection = mysqli_connect(DB_HOST,DB_USER,DB_PASS,DB_NAME);
if(!$connection){
die();
}
mysqli_set_charset($connection,"utf8");
PHP Warning: mysqli_connect(): (HY000/2002): Can't connect to MySQL server on 'domain.com' (115) in /home3/domain/public_html/a/i.php on line 7
Can anyone please help me find the solution to make this work?

Answer 1

Here's how I define a MYSQLI connection;
$con = mysqli_connect("localhost","username","password","database");
When you want to run an operation you just invoke the $con variable.
If you have issues check the permissions for the MYSQL user, they should at the very least include;
delete
insert
select
show view
update