Wordpress错误：（HY000 / 1045）：用户'root'@'localhost'的访问被拒绝（使用密码：是）1538行上的wp-db.php

Question

I get this error message when I try to access wp-admin of my wordpress site:

I have set up a local server with Wampserver and it worked fine in the beginning, but now this error message appears whenever i try to go to: localhost/wordpress/wp-admin.

I have tried to change the password and it didn't help. I have also looked up line 1538 in wp-db.php as the error message suggests but I can't see the problem. It looks like this:

if ( WP_DEBUG ) {
    mysqli_real_connect( $this->dbh, $host, $this->dbuser, $this->dbpassword, null, $port, $socket, $client_flags );
} else {
    @mysqli_real_connect( $this->dbh, $host, $this->dbuser, $this->dbpassword, null, $port, $socket, $client_flags );
}

Hope someone can help me!

Answer 1

This error has nothing to do with line 1538 in wp-db.php. This line of code is just trying to establish a connection using the credentials that you supplied. The error is likely with the password provided in your wp-config.php file.

Try to log on to your MySQL server directly using the credentials that you have supplied in the wp-config.php file and see that they work correctly.

You should be able to connect to to your MySQL instance locally with your "MySQL Command Line Client" in Windows in order to test your password.

Answer 2

This worked for me: edit wp.config.php, replacing

define ('DB_HOST', 'localhost');

with

define ('DB_HOST', '127.0.0.1');

Answer 3

I solved this by letting wordpress handle the issue. Just do nothing on wp-config-sample and continue wordpress installation. Then wordpress will automatically create wp-config asking db name, user and password.

Answer 4

Open the wp-config.php file and see how MySQL user and passwords are set.

/** MySQL database username */
define('DB_USER', 'bn_wordpress');

/** MySQL database password */
define('DB_PASSWORD', 'xxxxxx');

Answer 5

For mysql-server-5.7 (I believe older versions didn't have this problem) From my experience so far, and to start from scratch:

Let's start off with a clean slate:

cd /var/www/html/
wget https://wordpress.org/latest.tar.gz 
tar -xvzf latest.tar.gz
sudo chown -R www-data:www-data /var/www/html/wordpress

This will download, extract, and fix any file permission / ownership issues.

Now we have to fix mysql_native_password issues

SELECT user,authentication_string,plugin,host FROM mysql.user;

you will see a table as such:

+------------------+-------------------------------------------+-----------------------+-----------+
| user             | authentication_string                     | plugin                | host      |
+------------------+-------------------------------------------+-----------------------+-----------+
| root             |                                           | auth_socket           | localhost |
| mysql.session    | *THISISNOTAVALIDPASSWORDTHATCANBEUSEDHERE | mysql_native_password | localhost |
| mysql.sys        | *THISISNOTAVALIDPASSWORDTHATCANBEUSEDHERE | mysql_native_password | localhost |
| debian-sys-maint | *CC744277A401A7D25BE1CA89AFF17BF607F876FF | mysql_native_password | localhost |
+------------------+-------------------------------------------+-----------------------+-----------+

then run:

ALTER USER 'root'@'localhost' IDENTIFIED WITH mysql_native_password BY 'password';

Where 'password' is your root password that you set.

After doing this, run:

FLUSH PRIVILEGES;
SELECT user,authentication_string,plugin,host FROM mysql.user;

You should see your root password inside.

This will fix the issue.

Also, you will run into the same exact issue with phpMyAdmin, so the same concepts with "mysql_native_password" and ALTERING your user, and file/folder ownership as we did above will fix these issues.

Hope this helped.