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<?php | |
namespace traineratwot; | |
use FilesystemIterator; | |
use RecursiveDirectoryIterator; | |
use RecursiveIteratorIterator; | |
use RuntimeException; | |
use SplFileInfo; | |
if (!defined('WT_CACHE_PATH')) { | |
define('WT_CACHE_PATH', './'); | |
} | |
/** | |
* Класс для Кеша | |
* | |
* [gist.github.com](https://gist.github.com/Traineratwot/4cc7caa49f5b8951e434b241b84063dd) | |
*/ | |
class Cache | |
{ | |
/** | |
* Сохраняет результат выполнения callback функции в кеш или возвращает уже за кешированное значение | |
* | |
* @param mixed $key | |
* @param Callback $function function | |
* @param int $expire Время жизни | |
* @param string $category папка кеша | |
* @param mixed ...$args | |
* @return mixed|null | |
* @throws RuntimeException | |
*/ | |
public static function call($key, $function, $expire = 600, $category = '', ...$args) | |
{ | |
$result = self::getCache($key, $category); | |
if ($result !== NULL) { | |
return $result; | |
} | |
if (is_callable($function)) { | |
$args = func_get_args(); | |
$args = array_slice($args, 4); | |
$result = $function(...$args); | |
if ($result !== NULL) { | |
return self::setCache($key, $result, $expire, $category); | |
} | |
return NULL; | |
} | |
throw new RuntimeException("Is not a function"); | |
} | |
/** | |
* Возвращает значение из кеша | |
* @param mixed $key ключ | |
* @param string $category папка кеша | |
* @return mixed|null значение | |
*/ | |
public static function getCache($key, $category = '') | |
{ | |
//если установлен заголовок отключить кеш отключаем кеш | |
if (($category !== 'table') && function_exists('getallheaders')) { | |
$headers = getallheaders(); | |
if ($headers['Cache-Control'] === 'no-cache') { | |
return NULL; | |
} | |
} | |
$name = self::getKey($key) . '.cache.php'; | |
if (file_exists(WT_CACHE_PATH . $category . DIRECTORY_SEPARATOR . $name)) { | |
return include WT_CACHE_PATH . $category . DIRECTORY_SEPARATOR . $name; | |
} | |
return NULL; | |
} | |
/** | |
* Превратить ключ кеша в строку | |
* @param mixed $a | |
* @return string | |
*/ | |
public static function getKey($a) | |
{ | |
if (is_string($a) && strlen($a) < 32 && preg_match('@\w{1,32}@', $a)) { | |
return $a; | |
} | |
return md5(serialize($a)); | |
} | |
/** | |
* Сохраняет значение в кеш | |
* @param mixed $key ключ | |
* @param mixed $value значение | |
* @param int $expire Время жизни | |
* @param string $category папка кеша | |
* @return mixed | |
*/ | |
public static function setCache($key, $value, $expire = 600, $category = '') | |
{ | |
$name = self::getKey($key) . '.cache.php'; | |
$v = var_export($value, 1); | |
$expire = $expire ? $expire + time() : 0; | |
$body = <<<PHP | |
<?php | |
if($expire){if(time()>$expire){unlink(__FILE__);return null;}} | |
return $v | |
?> | |
PHP; | |
$concurrentDirectory = WT_CACHE_PATH . $category . DIRECTORY_SEPARATOR; | |
if (!file_exists($concurrentDirectory) || !is_dir($concurrentDirectory)) { | |
if (!mkdir($concurrentDirectory, 0777, TRUE) && !is_dir($concurrentDirectory)) { | |
throw new RuntimeException(sprintf('Directory "%s" was not created', $concurrentDirectory)); | |
} | |
} | |
if (is_dir($concurrentDirectory)) { | |
file_put_contents($concurrentDirectory . $name, $body); | |
} | |
return $value; | |
} | |
/** | |
* Удаляет файл кеша | |
* @param mixed $key ключ | |
* @param string $category папка кеша | |
* @return bool | |
*/ | |
public static function removeCache($key, $category = '') | |
{ | |
$name = self::getKey($key) . '.cache.php'; | |
if (file_exists(WT_CACHE_PATH . $category . DIRECTORY_SEPARATOR . $name)) { | |
unlink(WT_CACHE_PATH . $category . DIRECTORY_SEPARATOR . $name); | |
} | |
return !file_exists(WT_CACHE_PATH . $name); | |
} | |
public static function autoRemove() | |
{ | |
$dirs = new RecursiveDirectoryIterator(WT_CACHE_PATH, FilesystemIterator::SKIP_DOTS); | |
$Iterator = new RecursiveIteratorIterator($dirs); | |
/** @var SplFileInfo $file */ | |
foreach ($Iterator as $file) { | |
if (strpos($file->getFilename(), '.cache.php') !== FALSE) { | |
include $file->getPathname(); | |
} | |
} | |
} | |
public static function removeAll($dir = WT_CACHE_PATH) | |
{ | |
if (strpos($dir, WT_CACHE_PATH) === FALSE) { | |
throw new RuntimeException(); | |
} | |
if ($objs = glob($dir . '/*')) { | |
foreach ($objs as $obj) { | |
is_dir($obj) ? self::removeAll($obj) : unlink($obj); | |
} | |
} | |
rmdir($dir); | |
} | |
} |
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