|
1
|
|
|
<?php |
|
2
|
|
|
|
|
3
|
|
|
namespace Yiisoft\Cache; |
|
4
|
|
|
|
|
5
|
|
|
use DateInterval; |
|
6
|
|
|
use DateTime; |
|
7
|
|
|
use Exception; |
|
8
|
|
|
use Psr\SimpleCache\CacheInterface; |
|
|
|
|
|
|
9
|
|
|
|
|
10
|
|
|
/** |
|
11
|
|
|
* ArrayCache provides caching for the current request only by storing the values in an array. |
|
12
|
|
|
* |
|
13
|
|
|
* See {@see \Psr\SimpleCache\CacheInterface} for common cache operations that ArrayCache supports. |
|
14
|
|
|
*/ |
|
15
|
|
|
final class ArrayCache implements CacheInterface |
|
16
|
|
|
{ |
|
17
|
|
|
public const EXPIRATION_INFINITY = 0; |
|
18
|
6 |
|
|
|
19
|
|
|
private $cache = []; |
|
20
|
6 |
|
|
|
21
|
|
|
public function get($key, $default = null) |
|
22
|
|
|
{ |
|
23
|
19 |
|
if (isset($this->cache[$key]) && !$this->isExpired($key)) { |
|
24
|
|
|
$value = $this->cache[$key][0]; |
|
25
|
19 |
|
if (is_object($value)) { |
|
26
|
17 |
|
$value = clone $value; |
|
27
|
|
|
} |
|
28
|
|
|
|
|
29
|
13 |
|
return $value; |
|
30
|
|
|
} |
|
31
|
|
|
|
|
32
|
19 |
|
return $default; |
|
33
|
|
|
} |
|
34
|
19 |
|
|
|
35
|
19 |
|
public function set($key, $value, $ttl = null): bool |
|
36
|
|
|
{ |
|
37
|
|
|
$expiration = $this->ttlToExpiration($ttl); |
|
38
|
2 |
|
if ($expiration < 0) { |
|
39
|
|
|
return $this->delete($key); |
|
40
|
2 |
|
} |
|
41
|
2 |
|
if (is_object($value)) { |
|
42
|
|
|
$value = clone $value; |
|
43
|
|
|
} |
|
44
|
19 |
|
$this->cache[$key] = [$value, $expiration]; |
|
45
|
|
|
return true; |
|
46
|
19 |
|
} |
|
47
|
19 |
|
|
|
48
|
|
|
public function delete($key): bool |
|
49
|
|
|
{ |
|
50
|
|
|
unset($this->cache[$key]); |
|
51
|
|
|
return true; |
|
52
|
|
|
} |
|
53
|
|
|
|
|
54
|
|
|
public function clear(): bool |
|
55
|
|
|
{ |
|
56
|
|
|
$this->cache = []; |
|
57
|
|
|
return true; |
|
58
|
|
|
} |
|
59
|
|
|
|
|
60
|
|
|
public function getMultiple($keys, $default = null) |
|
61
|
|
|
{ |
|
62
|
|
|
$results = []; |
|
63
|
|
|
foreach ($keys as $key) { |
|
64
|
|
|
$value = $this->get($key, $default); |
|
65
|
|
|
$results[$key] = $value; |
|
66
|
|
|
} |
|
67
|
|
|
return $results; |
|
68
|
|
|
} |
|
69
|
|
|
|
|
70
|
|
|
public function setMultiple($values, $ttl = null): bool |
|
71
|
|
|
{ |
|
72
|
|
|
foreach ($values as $key => $value) { |
|
73
|
|
|
$this->set($key, $value, $ttl); |
|
74
|
|
|
} |
|
75
|
|
|
return true; |
|
76
|
|
|
} |
|
77
|
|
|
|
|
78
|
|
|
public function deleteMultiple($keys): bool |
|
79
|
|
|
{ |
|
80
|
|
|
foreach ($keys as $key) { |
|
81
|
|
|
$this->delete($key); |
|
82
|
|
|
} |
|
83
|
|
|
return true; |
|
84
|
|
|
} |
|
85
|
|
|
|
|
86
|
|
|
public function has($key): bool |
|
87
|
|
|
{ |
|
88
|
|
|
return isset($this->cache[$key]) && !$this->isExpired($key); |
|
89
|
|
|
} |
|
90
|
|
|
|
|
91
|
|
|
/** |
|
92
|
|
|
* Checks whether item is expired or not |
|
93
|
|
|
* @param $key |
|
94
|
|
|
* @return bool |
|
95
|
|
|
*/ |
|
96
|
|
|
private function isExpired($key): bool |
|
97
|
|
|
{ |
|
98
|
|
|
return $this->cache[$key][1] !== 0 && $this->cache[$key][1] <= time(); |
|
99
|
|
|
} |
|
100
|
|
|
|
|
101
|
|
|
/** |
|
102
|
|
|
* Converts TTL to expiration |
|
103
|
|
|
* @param $ttl |
|
104
|
|
|
* @return int |
|
105
|
|
|
*/ |
|
106
|
|
|
protected function ttlToExpiration($ttl): int |
|
107
|
|
|
{ |
|
108
|
|
|
$ttl = $this->normalizeTtl($ttl); |
|
109
|
|
|
|
|
110
|
|
|
if ($ttl === null) { |
|
111
|
|
|
$expiration = static::EXPIRATION_INFINITY; |
|
112
|
|
|
} elseif ($ttl <= 0) { |
|
113
|
|
|
$expiration = -1; |
|
114
|
|
|
} else { |
|
115
|
|
|
$expiration = $ttl + time(); |
|
116
|
|
|
} |
|
117
|
|
|
|
|
118
|
|
|
return $expiration; |
|
119
|
|
|
} |
|
120
|
|
|
|
|
121
|
|
|
/** |
|
122
|
|
|
* Normalizes cache TTL handling `null` value and {@see DateInterval} objects. |
|
123
|
|
|
* @param int|DateInterval|null $ttl raw TTL. |
|
124
|
|
|
* @return int|null TTL value as UNIX timestamp or null meaning infinity |
|
125
|
|
|
*/ |
|
126
|
|
|
protected function normalizeTtl($ttl): ?int |
|
127
|
|
|
{ |
|
128
|
|
|
if ($ttl instanceof DateInterval) { |
|
129
|
|
|
try { |
|
130
|
|
|
return (new DateTime('@0'))->add($ttl)->getTimestamp(); |
|
131
|
|
|
} catch (Exception $e) { |
|
132
|
|
|
return null; |
|
133
|
|
|
} |
|
134
|
|
|
} |
|
135
|
|
|
|
|
136
|
|
|
return $ttl; |
|
137
|
|
|
} |
|
138
|
|
|
} |
|
139
|
|
|
|
yiisoft /
cache
Let?s assume that you have a directory layout like this:
. |-- OtherDir | |-- Bar.php | `-- Foo.php `-- SomeDir `-- Foo.phpand let?s assume the following content of
Bar.php:If both files
OtherDir/Foo.phpandSomeDir/Foo.phpare loaded in the same runtime, you will see a PHP error such as the following:PHP Fatal error: Cannot use SomeDir\Foo as Foo because the name is already in use in OtherDir/Foo.phpHowever, as
OtherDir/Foo.phpdoes not necessarily have to be loaded and the error is only triggered if it is loaded beforeOtherDir/Bar.php, this problem might go unnoticed for a while. In order to prevent this error from surfacing, you must import the namespace with a different alias: