What are the potential pitfalls of migrating PHP config variables stored in arrays to a MySQL database?

Migrating PHP config variables stored in arrays to a MySQL database can introduce potential pitfalls such as increased complexity, slower performance due to database queries, and potential security risks if not properly secured. To mitigate these issues, consider storing only essential configuration variables in the database and caching frequently accessed values to improve performance. 

// Example of storing and retrieving config variables from a MySQL database

// Connect to the database
$servername = "localhost";
$username = "username";
$password = "password";
$dbname = "config_db";

$conn = new mysqli($servername, $username, $password, $dbname);

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

// Retrieve config variables from the database
$sql = "SELECT * FROM config_table";
$result = $conn->query($sql);

if ($result->num_rows > 0) {
    // Output data of each row
    while($row = $result->fetch_assoc()) {
        $config[$row["key"]] = $row["value"];
    }
} else {
    echo "0 results";
}

// Close the database connection
$conn->close();

// Use the config variables as needed
echo $config["site_name"];

Keywords

PHP configuration variables arrays MySQL database migration

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