What is the purpose of using Singletons in PHP development?

Singletons in PHP development are used to ensure that a class has only one instance and provide a global point of access to that instance. This can be useful when you want to restrict the instantiation of a class to a single object, such as a database connection or a configuration manager. By using Singletons, you can prevent multiple instances of a class from being created, which can help improve performance and prevent issues related to resource management.

class Singleton {
    private static $instance;

    private function __construct() {
        // private constructor to prevent instantiation
    }

    public static function getInstance() {
        if (!isset(self::$instance)) {
            self::$instance = new self();
        }
        return self::$instance;
    }
}