52 lines
1.1 KiB
PHP
52 lines
1.1 KiB
PHP
<?php
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namespace Util;
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/**
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* Classe astratta per la generazione di oggetti istanziabili una singola volta.
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*
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* @since 2.3
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*/
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abstract class Singleton
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{
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/** @var Singleton Oggetti istanziati */
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protected static $instance = [];
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/**
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* Protected constructor to prevent creating a new instance of the <b>Singleton</b> via the `new` operator from outside of this class.
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*/
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protected function __construct()
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{
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}
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/**
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* Restituisce l'istanza della classe in oggetto.
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*
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* @return Singleton
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*/
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public static function getInstance()
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{
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$class = get_called_class();
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if (!isset(self::$instance[$class])) {
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self::$instance[$class] = new static();
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}
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return self::$instance[$class];
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}
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/**
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* Private clone method to prevent cloning of the instance of the <b>Singleton</b> instance.
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*/
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private function __clone()
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{
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}
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/**
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* Private unserialize method to prevent unserializing of the <b>Singleton</b> instance.
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*/
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private function __wakeup()
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{
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}
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}
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