I'm trying to install a normal forum on my Mac, for which I just created a database and a user from the MySQL command line:

mysql> CREATE DATABASE vanilla;
Query OK, 1 row affected (0.00 sec)

mysql> create user 'vanilla_user3'@'localhost' IDENTIFIED BY 'vanilla_password';
Query OK, 0 rows affected (0.00 sec)

mysql> GRANT ALL PRIVILEGES ON * . * TO 'vanilla_user3'@'localhost';
Query OK, 0 rows affected (0.00 sec)

mysql> FLUSH PRIVILEGES;
Query OK, 0 rows affected (0.00 sec)

So I tried to connect using the following code:

$con=mysqli_connect("localhost","vanilla_user3","vanilla_password","vanilla");
if (mysqli_connect_errno($con)) {
  echo "Failed to connect to MySQL: " . mysqli_connect_error();
}

But unfortunately I got an error message

Warning: mysqli_connect(): (HY000/2002): No such file or directory in /Users/kramer65/Sites/vanilla/info.php on line 3 Unable to connect to MySQL: No such file or directory

Do you know where I went wrong?