87 lines
2.4 KiB
PHP
87 lines
2.4 KiB
PHP
<?PHP
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/**
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* Provides static functions for simple caching.
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*
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* @author Joshua Ramon Enslin <joshua@museum-digital.de>
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*/
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declare(strict_types = 1);
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/**
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* Provides caching functions.
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*/
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final class MD_STD_CACHE {
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/** @var string */
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public static string $redis_host = '127.0.0.1';
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/** @var integer */
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public static int $redis_port = 6379;
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/**
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* Shutdown function for caching contents of output buffer.
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*
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* @param string $redisKey Key to cache by in redis.
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* @param integer $expiry Expiration time in seconds.
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*
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* @return void
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*/
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public static function shutdown_cache_through_redis(string $redisKey, int $expiry = 3600):void {
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$outputT = trim(MD_STD::minimizeHTMLString(MD_STD::ob_get_clean()));
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echo $outputT;
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$redis = new Redis();
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$redis->connect(self::$redis_host, self::$redis_port, 1, null, 0, 0, ['auth' => [MD_CONF::$redis_pw]]);
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$redis->set($redisKey, $outputT);
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$redis->expire($redisKey, $expiry);
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$redis->close();
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}
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/**
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* Caches and serves a page through redis. Should be called at the start
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* of the script generating a page.
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*
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* @param string $redisKey Key to cache by in redis.
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* @param integer $expiry Expiration time in seconds.
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*
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* @return string
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*/
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public static function serve_page_through_redis_cache(string $redisKey, int $expiry = 3600):string {
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if (PHP_SAPI === 'cli') return '';
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$redis = new Redis();
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$redis->connect(self::$redis_host, self::$redis_port, 1, null, 0, 0, ['auth' => [MD_CONF::$redis_pw]]);
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if ($redis->ping() !== false) {
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ob_start();
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if (($redisResult = $redis->get($redisKey))) {
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if (strlen($redisResult) > 3) {
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$redis->close();
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return $redisResult;
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}
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else {
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register_shutdown_function(function(string $redisKey, int $expiry = 3600) :void {
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self::shutdown_cache_through_redis($redisKey, $expiry);
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}, $redisKey);
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}
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}
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else {
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register_shutdown_function(function(string $redisKey, int $expiry = 3600) :void {
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self::shutdown_cache_through_redis($redisKey, $expiry);
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}, $redisKey);
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}
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}
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$redis->close();
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return '';
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}
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}
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