imagify / classes / Traits / InstanceGetterTrait.php

InstanceGetterTrait.php in Imagify Image Optimization: Optimize Images | Compress & Convert to WebP/AVIF 2.3.0, at classes/Traits/InstanceGetterTrait.php

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1	<?php
2	namespace Imagify\Traits;
3
4	/**
5	* Trait that simulates a singleton pattern.
6	* The idea is more to ease the instance retrieval than to prevent multiple instances.
7	* This is temporary, until we get a DI container.
8	*
9	* @since 1.9
10	* @since 1.9.4 Renamed into InstanceGetterTrait.
11	* @author Grégory Viguier
12	*/
13	trait InstanceGetterTrait {
14
15	/**
16	* The "not-so-single" instance of the class.
17	*
18	* @var ?object
19	* @since 1.9
20	* @access protected
21	* @author Grégory Viguier
22	*/
23	protected static $instance = null;
24
25	/**
26	* Get the main Instance.
27	*
28	* @since 1.9
29	* @access protected
30	* @author Grégory Viguier
31	*
32	* @return object Main instance.
33	*/
34	public static function get_instance() {
35	if ( ! isset( static::$instance ) ) {
36	static::$instance = new static();
37	}
38
39	return static::$instance;
40	}
41	}
42