← All changes | back/Libraries/Pelago/Emogrifier/src/Utilities/ArrayIntersector.php +0 -57 trunk → 11.1.1 View file →

		@@ -1,57 +1,0 @@
1		-<?php
2		-
3		-declare(strict_types=1);
4		-
5		-namespace AcyMailing\Libraries\Pelago\Emogrifier\Utilities;
6		-
7		-/**
8		- * When computing many array intersections using the same array, it is more efficient to use `array_flip()` first and
9		- * then `array_intersect_key()`, than `array_intersect()`. See the discussion at
10		- * {@link https://stackoverflow.com/questions/6329211/php-array-intersect-efficiency Stack Overflow} for more
11		- * information.
12		- *
13		- * Of course, this is only possible if the arrays contain integer or string values, and either don't contain duplicates,
14		- * or that fact that duplicates will be removed does not matter.
15		- *
16		- * This class takes care of the detail.
17		- *
18		- * @internal
19		- */
20		-final class ArrayIntersector
21		-{
22		- /**
23		- * the array with which the object was constructed, with all its keys exchanged with their associated values
24		- *
25		- * @var array<array-key, array-key>
26		- */
27		- private $invertedArray;
28		-
29		- /**
30		- * Constructs the object with the array that will be reused for many intersection computations.
31		- *
32		- * @param array<array-key, array-key> $array
33		- */
34		- public function __construct(array $array)
35		- {
36		- $this->invertedArray = \array_flip($array);
37		- }
38		-
39		- /**
40		- * Computes the intersection of `$array` and the array with which this object was constructed.
41		- *
42		- * @param array<array-key, array-key> $array
43		- *
44		- * @return array<array-key, array-key>
45		- * Returns an array containing all of the values in `$array` whose values exist in the array
46		- * with which this object was constructed. Note that keys are preserved, order is maintained, but
47		- * duplicates are removed.
48		- */
49		- public function intersectWith(array $array): array
50		- {
51		- $invertedArray = \array_flip($array);
52		-
53		- $invertedIntersection = \array_intersect_key($invertedArray, $this->invertedArray);
54		-
55		- return \array_flip($invertedIntersection);
56		- }
57		-}