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PHP Integrating PHP with Databases Databases and PHP Getting Started with PDO

Unable to connect the database by using and show fatal error

Access denied for user 'root'@'localhost' (using password: YES) I am not sure what is the error of above after I trying to access http://localhost/integrating_php_with_databases_s1v1/inc/connection.php

I am wondering is it the error telling me that I should set the password as YES? But I thought that we are able to reset the password?

I did create a config.php and a connection.php


define("BASE_URL", "localhost/integrating_php_with_databases_s1v1");
define("ROOT_PATH",$_SERVER["DOCUMENT_ROOT"] . "/" . "integrating_php_with_databases_s1v1/");

define("DB_PORT", "8889");



$db = new PDO("mysql:host=" . DB_HOST . ";dbname=" . DB_NAME . ";port=" . DB_PORT, DB_USER, DB_PASS);

echo "Connected to the database";

Any help and explanation will be appreciated.