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<?php |
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namespace Yiisoft\Cache; |
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use DateInterval; |
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use DateTime; |
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use Exception; |
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use Psr\SimpleCache\CacheInterface; |
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/** |
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* ApcuCache provides APCu caching in terms of an application component. |
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* |
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* To use this application component, the [APCu PHP extension](http://www.php.net/apcu) must be loaded. |
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* In order to enable APCu for CLI you should add "apc.enable_cli = 1" to your php.ini. |
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* |
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* See {@see \Psr\SimpleCache\CacheInterface} for common cache operations that ApcCache supports. |
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*/ |
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class ApcuCache implements CacheInterface |
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{ |
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private const TTL_INFINITY = 0; |
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private const TTL_EXPIRED = -1; |
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public function get($key, $default = null) |
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{ |
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$value = \apcu_fetch($key, $success); |
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return $success ? $value : $default; |
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} |
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public function set($key, $value, $ttl = null) |
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{ |
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$ttl = $this->normalizeTtl($ttl); |
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if ($ttl < 0) { |
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return $this->delete($key); |
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} |
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return \apcu_store($key, $value, $ttl); |
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} |
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public function delete($key) |
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{ |
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return \apcu_delete($key); |
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} |
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public function clear() |
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{ |
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return \apcu_clear_cache(); |
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} |
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public function getMultiple($keys, $default = null) |
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{ |
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$values = \apcu_fetch($this->iterableToArray($keys), $success) ?: []; |
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return array_merge(array_fill_keys($this->iterableToArray($keys), $default), $values); |
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} |
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public function setMultiple($values, $ttl = null) |
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{ |
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return \apcu_store($this->iterableToArray($values), null, $this->normalizeTtl($ttl)) === []; |
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} |
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public function deleteMultiple($keys) |
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{ |
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return \apcu_delete($this->iterableToArray($keys)) === []; |
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} |
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public function has($key) |
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{ |
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return \apcu_exists($key); |
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} |
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/** |
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* Normalizes cache TTL handling `null` value and {@see DateInterval} objects. |
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* @param int|DateInterval|null $ttl raw TTL. |
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* @return int|null TTL value as UNIX timestamp or null meaning infinity |
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*/ |
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private function normalizeTtl($ttl): ?int |
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{ |
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$normalizedTtl = $ttl; |
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if ($ttl instanceof DateInterval) { |
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try { |
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$normalizedTtl = (new DateTime('@0'))->add($ttl)->getTimestamp(); |
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} catch (Exception $e) { |
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$normalizedTtl = self::TTL_EXPIRED; |
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} |
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} |
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return $normalizedTtl ?? static::TTL_INFINITY; |
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} |
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/** |
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* Converts iterable to array |
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* @param iterable $iterable |
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* @return array |
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*/ |
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private function iterableToArray(iterable $iterable): array |
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{ |
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return $iterable instanceof \Traversable ? iterator_to_array($iterable) : (array)$iterable; |
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} |
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} |
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yiisoft /
cache
Loading history...
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: