src/Buffered/Utils/BufferCollection.php
public function expired($key)
    {
        if ($this->get($key) !== false) {
            // returned a value, clearly not yet expired
            return false;
        }

        // a known item, not returned by get, is expired
        return array_key_exists($key, $this->cache->items);
    }
public function expired($key)
    {
        if ($this->get($key) !== false) {
            // returned a value, clearly not yet expired
            return false;
        }

        // a known item, not returned by get, is expired
        return array_key_exists($key, $this->cache->items);
    }
public function expired ( $ key ) { if ( $ this -> get ( $ key ) !== false ) { // returned a value, clearly not yet expired return false ; } // a known item, not returned by get, is expired return array_key_exists ( $ key , $ this -> cache -> items ) ; }
Check if a key existed in local storage, but is now expired.

Because our local buffer is also just a real cache, expired items will
just return nothing, which will lead us to believe no such item exists in
that local cache, and we'll reach out to the real cache (where the value
may not yet have been expired because that may have been part of an
uncommitted write)
So we'll want to know when a value is in local cache, but expired!

@param string $key

@return bool
Check if a key existed in local storage but is now expired .