PHP - spl_autoload_register example

spl_autoload_register automatically loads classes.
Once write autoloader function that parses file path from class namespace and
You will never have to include every php files manually with functions like "require".
// function contains logic of parsing file path from namespace
function myAutoLoader($className) {
    require str_replace("\\", DIRECTORY_SEPARATOR, $className) . '.php';
}

spl_autoload_register('myAutoLoader');

$db = new \models\db\DbConnection();