function LruMemoryCache::set

Overrides MemoryCache::set

File

core/lib/Drupal/Core/Cache/MemoryCache/LruMemoryCache.php, line 75

Class

LruMemoryCache

Defines a least recently used (LRU) static cache implementation.

Namespace

Code

public function set($cid, $data, $expire = Cache::PERMANENT, array $tags = []) : void {
    if (isset($this->cache[$cid])) {
        // If the item is already in the cache, move it to end of the array.
        unset($this->cache[$cid]);
    }
    elseif (count($this->cache) > $this->allowedSlots - 1) {
        // Remove one item from the cache to ensure we remain within the allowed
        // number of slots. Avoid using array_slice() because it makes a copy of the
        // array, and avoid using array_splice() or array_shift() because they
        // re-index numeric keys.
        unset($this->cache[array_key_first($this->cache)]);
    }
    parent::set($cid, $data, $expire, $tags);
}