tableberg / includes / traits / Singleton_Trait.php

Singleton_Trait.php in Tableberg – Simple Gutenberg Table Block 0.4.1, at includes/traits/Singleton_Trait.php

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1	<?php
2	/**
3	* Singleton trait
4	*
5	* @package Tableberg
6	*/
7
8	namespace Tableberg\includes\traits;
9
10	/**
11	* Singleton trait.
12	*/
13	trait Singleton_Trait {
14	/**
15	* Class instance options.
16	*
17	* @private
18	* @var array
19	*/
20	private $class_options = array();
21
22	/**
23	* Manager base instance.
24	*
25	* @var null\|object
26	*/
27	protected static $instance = null;
28
29	/**
30	* Class instance constructor.
31	*
32	* @param array $const_args constructor args.
33	*/
34	protected function __construct( $const_args = array() ) {
35	$this->class_options = $const_args;
36	}
37
38	/**
39	* Get class instance.
40	*
41	* @param array $constructor_args constructor args.
42	* @param string\|null $class_name class name to create instance.
43	*
44	* @return object object instance
45	*/
46	public static function get_instance( $constructor_args = array(), $class_name = null ) {
47	if ( is_null( static::$instance ) ) {
48	static::create_instance( $constructor_args, $class_name );
49	}
50
51	return static::$instance;
52	}
53
54	/**
55	* Force create instance of singleton if it there is none.
56	*
57	* @param array $constructor_args constructor args.
58	* @param string\|null $class_name class name to create instance.
59	*
60	* @return void
61	*/
62	final protected static function create_instance( $constructor_args = array(), $class_name = null ) {
63	if ( is_null( static::$instance ) ) {
64	$class_name = __CLASS__;
65
66	if ( ! is_null( $class_name ) ) {
67	$class_name = class_exists( $class_name ) ? $class_name : __CLASS__;
68	}
69
70	static::$instance = new $class_name( $constructor_args );
71	}
72	}
73	}
74