protected function saveToCache($cacheKey, $content)
    {
        // Create or update the index list containing all cache keys for a given image and filter pairing.
        $indexKey = $this->generateIndexKey($cacheKey);
        if ($this->cache->contains($indexKey)) {
            $index = (array) $this->cache->fetch($indexKey);

            if (!\in_array($cacheKey, $index, true)) {
                $index[] = $cacheKey;
            }
        } else {
            $index = [$cacheKey];
        }

        /*
         * Only save the content, if the index has been updated successfully.
         * This is required to have a (hopefully) synchron state between cache and backend.
         *
         * "Hopefully" because there are caches (like Memcache) which will remove keys by themselves.
         */
        if ($this->cache->save($indexKey, $index)) {
            return $this->cache->save($cacheKey, $content);
        }

        return false;
    }
protected function saveToCache($cacheKey, $content)
    {
        // Create or update the index list containing all cache keys for a given image and filter pairing.
        $indexKey = $this->generateIndexKey($cacheKey);
        if ($this->cache->contains($indexKey)) {
            $index = (array) $this->cache->fetch($indexKey);

            if (!\in_array($cacheKey, $index, true)) {
                $index[] = $cacheKey;
            }
        } else {
            $index = [$cacheKey];
        }

        /*
         * Only save the content, if the index has been updated successfully.
         * This is required to have a (hopefully) synchron state between cache and backend.
         *
         * "Hopefully" because there are caches (like Memcache) which will remove keys by themselves.
         */
        if ($this->cache->save($indexKey, $index)) {
            return $this->cache->save($cacheKey, $content);
        }

        return false;
    }
protected function saveToCache ( $ cacheKey , $ content ) { // Create or update the index list containing all cache keys for a given image and filter pairing. $ indexKey = $ this -> generateIndexKey ( $ cacheKey ) ; if ( $ this -> cache -> contains ( $ indexKey ) ) { $ index = ( array ) $ this -> cache -> fetch ( $ indexKey ) ; if ( ! \ in_array ( $ cacheKey , $ index , true ) ) { $ index [ ] = $ cacheKey ; } } else { $ index = [ $ cacheKey ] ; } /*
         * Only save the content, if the index has been updated successfully.
         * This is required to have a (hopefully) synchron state between cache and backend.
         *
         * "Hopefully" because there are caches (like Memcache) which will remove keys by themselves.
         */ if ( $ this -> cache -> save ( $ indexKey , $ index ) ) { return $ this -> cache -> save ( $ cacheKey , $ content ) ; } return false ; }
Save the given content to the cache and update the cache index.

@param string $cacheKey
@param mixed  $content

@return bool
Save the given content to the cache and update the cache index .