How can including database connection data in a separate config file affect MySQL query results in PHP?

Including database connection data in a separate config file can improve code organization and security by separating sensitive information from the main codebase. This can prevent accidental exposure of credentials and make it easier to update connection details without modifying multiple files. To implement this, simply create a config file (e.g., config.php) with variables for database host, username, password, and database name, and include this file in your PHP scripts where needed. 

// config.php
<?php
$db_host = 'localhost';
$db_user = 'username';
$db_pass = 'password';
$db_name = 'database_name';
?>

// index.php
<?php
include 'config.php';

$conn = new mysqli($db_host, $db_user, $db_pass, $db_name);

if ($conn->connect_error) {
    die("Connection failed: " . $conn->connect_error);
}

// Perform MySQL queries using $conn
?>

Keywords

PHP MySQL database connection config file query results

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