src/SplFixedArrayStasis.php source

1	<?php
2
3	declare(strict_types=1);
4
5	namespace Serializor;
6
7	use SplFixedArray;
8
9	/**
10	* Stasis for SplFixedArray on PHP versions that lack __serialize()/__unserialize().
11	* PHP 8.2+ has native support; this handles PHP 8.1.
12	*/
13	final class SplFixedArrayStasis extends Stasis
14	{
15	/**
16	* The array size.
17	*/
18	private int $s;
19
20	/**
21	* The array elements.
22	*/
23	public array $e = [];
24
25	public function __construct(int $size)
26	{
27	$this->s = $size;
28	}
29
30	public function __serialize(): array
31	{
32	return [$this->s, $this->e];
33	}
34
35	public function __unserialize(array $data): void
36	{
37	[$this->s, $this->e] = $data;
38	}
39
40	public function getClassName(): string
41	{
42	return SplFixedArray::class;
43	}
44
45	/**
46	* Get reference to elements array for transformation.
47	*/
48	public function &getElements(): array
49	{
50	return $this->e;
51	}
52
53	public static function fromArray(SplFixedArray $source): self
54	{
55	$frozen = new self($source->getSize());
56	foreach ($source as $i => $v) {
57	$frozen->e[$i] = $v;
58	}
59	return $frozen;
60	}
61
62	public function &getInstance(): mixed
63	{
64	if ($this->hasInstance()) {
65	return $this->getCachedInstance();
66	}
67
68	$arr = new SplFixedArray($this->s);
69	foreach ($this->e as $i => $v) {
70	if ($v instanceof Stasis) {
71	if ($v->hasInstance()) {
72	$arr[$i] = $v->getInstance();
73	} else {
74	$v->whenResolved(function ($instance) use ($arr, $i) {
75	$arr[$i] = $instance;
76	});
77	}
78	} else {
79	$arr[$i] = $v;
80	}
81	}
82
83	$this->setInstance($arr);
84	return $arr;
85	}
86	}
87