What are common pitfalls when changing MySQL database access credentials in PHP scripts?

Common pitfalls when changing MySQL database access credentials in PHP scripts include forgetting to update the credentials in all relevant files, accidentally exposing the credentials in publicly accessible files, and not securely storing the credentials. To securely change MySQL database access credentials in PHP scripts, it is recommended to store the credentials in a separate configuration file outside of the document root, ensure that the file is not publicly accessible, and update the credentials in all relevant files. 

<?php
// config.php
define('DB_HOST', 'new_host');
define('DB_USER', 'new_username');
define('DB_PASS', 'new_password');
define('DB_NAME', 'new_database_name');
?>
```

Then, in your PHP scripts, include the configuration file and use the defined constants to establish a connection to the database:

```php
<?php
include 'config.php';

$connection = mysqli_connect(DB_HOST, DB_USER, DB_PASS, DB_NAME);

if (!$connection) {
    die("Connection failed: " . mysqli_connect_error());
}

echo "Connected successfully";
?>

Keywords

MySQL database access credentials PHP scripts security.

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