My database user exists, but I still get an (HY000

问题:

I'm trying to install vanilla forums on my Mac, and for this 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 try 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 get an error saying Warning: mysqli_connect(): (HY000/2002): No such file or directory in /Users/kramer65/Sites/vanilla/info.php on line 3 Failed to connect to MySQL: No such file or directory

Any idea where I'm going wrong?

回答1:

Alright, I just found the solution. The problem turned out to be that the host shouldn't have been localhost, but 127.0.0.1. I always thought localhost and 127.0.0.1 was the same, but it turned out to be different.

So maybe as a tip for future users, always use the ip when in doubt.

I wish you all a beautiful day!

回答2:

I had the same problem but the issue was something related to php.ini file.

I had to edit these two lines in /etc/php.ini (or wherever your php.ini is located):

mysql.default_socket = /tmp/mysql.sock
mysqli.default_socket = /tmp/mysql.sock

Restart apache server to make sure the changes are reflected.

sudo apachectl restart

回答3:

Let's say your MAMP MySQL Port is set to 8889 like it is by default. Sometimes localhost alone is not enough in which case you have to put the MySQL port in there too so you would do localhost:8889 or localhost:{whatever your MySQL port number is}. I'm still new to MySQL so I don't know the reason why, but to anyone out there who recently got the message: Warning: mysqli::mysqli(): (HY000/2002): No such file or directory in ... adding the MySQL port number onto localhost was the fix for me.