Simple cache system based on Symfony's Cache component. Will always return a value, fresh or from cache, depending on TTL.
composer require mesavolt/simple-cache<?php
use Mesavolt\SimpleCache;
$cache = new SimpleCache(sys_get_temp_dir());
$ttl = 10; // values expire after 10 seconds
// use the cache for the 1st, the callable is executed, a fresh value is cached and returned
$value1 = $cache->get('key', function () {
return time();
}, $ttl);
// use the cache again before TTL has passed.
// the callable is *not* executed again, the previously cached value is returned
$value2 = $cache->get('key', function () {
return time();
}, $ttl);
assert($value2 === $value1); // true because TTL hasn't expired
// sleep 20 seconds, this is longer that our TTL of 10 seconds
sleep(20);
// use the cache for the 3rd time, TTL has expired so a new fresh value is cached and returned
$value3 = $cache->get('key', function () {
return time();
});
assert($value3 !== $value1); // true because `sleep(20)` expired the TTL
// so the callable has been executed
// and a fresh value has been returned (and cached)