Error establishing a database connection in my localhost - php

Question

I am trying to install Wordpress in my localhost Xampp server
But every time I got an error message with
error establishing database connection.
This either means that the username and password information in your
wp-config.php file is incorrect or we can’t contact the database
server at localhost. This could mean your host’s database server is
down.
I have already googling but not get the correct answer yet.
I add define( 'WP_ALLOW_REPAIR', true ); in wp-config.php but not solved.......

Answer 1

This means wordpress can't find your database.
Navigate to http://localhost/phpmyadmin. Where it says create new database, choose a name for your database.
Next, open up wp-config.php in the root of your wordpress folder, and update the four values shown below to reflect your new database.
The default credentials for your newly created database are:
DB_NAME: Your chosen db name (case sensitive)
DB_USERNAME: root
DB_PASSWORD: ""
DB_HOST: localhost
/** The name of the database for WordPress */
define('DB_NAME', 'case sensitive chosen db name');
/** MySQL database username */
define('DB_USER', 'root');
/** MySQL database password */
define('DB_PASSWORD', '');
/** MySQL hostname */
define('DB_HOST', 'localhost');

Answer 2

I have solved my error as below procedure.
While installing Wordpress in localhost, first set some credentials of the file wp-config-sample.php as below
/** The name of the database for WordPress */
define( 'DB_NAME', 'learn_wordpress' );
/** MySQL database username */
define( 'DB_USER', 'root' );
/** MySQL database password */
define( 'DB_PASSWORD', '' );
/** MySQL hostname */
define( 'DB_HOST', 'localhost' );
and save the file name as wp-config.php and run again localhost/wordpress in the url.
It's done !!