Is it necessary to manually close the database connection after retrieving data from each table using PDO in PHP?

It is not necessary to manually close the database connection after retrieving data from each table when using PDO in PHP. PDO automatically closes the connection when the script finishes executing. However, it is good practice to explicitly close the connection if it is no longer needed to free up resources. 

// Connect to the database
$dsn = 'mysql:host=localhost;dbname=mydatabase';
$username = 'username';
$password = 'password';

try {
    $pdo = new PDO($dsn, $username, $password);
    // Retrieve data from tables
    // Perform queries
    // No need to manually close the connection
} catch (PDOException $e) {
    echo 'Connection failed: ' . $e->getMessage();
}

Keywords

PHP PDO database connection data retrieval table.

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