<?php
/**
* The singleton class file.
*
* @package GenerateBlocks\Utils
*/
if ( ! defined( 'ABSPATH' ) ) {
exit; // Exit if accessed directly.
}
/**
* The GenerateBlocks Singleton class.
*
* @since 1.9.0
*/
class GenerateBlocks_Singleton {
/**
* Child class instances.
*
* @var array<static>
*/
private static $instances = [];
/**
* The singleton constructor can not be public.
*/
final protected function __construct() {
}
/**
* Not allowed to clone a singleton.
*/
protected function __clone() {
}
/**
* Not allowed to un-serialize a singleton.
*
* @throws Exception Cannot un-serialize a singleton.
*/
public function __wakeup() {
throw new Exception( 'Cannot un-serialize singleton' );
}
/**
* Get the class instance.
*
* @return static
*/
public static function get_instance(): GenerateBlocks_Singleton {
$subclass = static::class;
if ( ! isset( self::$instances[ $subclass ] ) ) {
self::$instances[ $subclass ] = new static();
}
return self::$instances[ $subclass ];
}
}