downgrade to kirby v3

kirby/src/Cache/MemCached.php

@@ -16,14 +16,10 @@ use Memcached as MemcachedExt;
 class MemCached extends Cache
 {
 	/**
-	 * Store for the memcache connection
+	 * store for the memcache connection
+	 * @var \Memcached
 	 */
-	protected MemcachedExt $connection;
-
-	/**
-	 * Stores whether the connection was successful
-	 */
-	protected bool $enabled;
+	protected $connection;
 
 	/**
 	 * Sets all parameters which are needed to connect to Memcached
@@ -43,19 +39,7 @@ class MemCached extends Cache
 		parent::__construct(array_merge($defaults, $options));
 
 		$this->connection = new MemcachedExt();
-		$this->enabled = $this->connection->addServer(
-			$this->options['host'],
-			$this->options['port']
-		);
-	}
-
-	/**
-	 * Returns whether the cache is ready to
-	 * store values
-	 */
-	public function enabled(): bool
-	{
-		return $this->enabled;
+		$this->connection->addServer($this->options['host'], $this->options['port']);
 	}
 
 	/**
@@ -66,28 +50,35 @@ class MemCached extends Cache
 	 *   // put an item in the cache for 15 minutes
 	 *   $cache->set('value', 'my value', 15);
 	 * </code>
+	 *
+	 * @param string $key
+	 * @param mixed $value
+	 * @param int $minutes
+	 * @return bool
 	 */
 	public function set(string $key, $value, int $minutes = 0): bool
 	{
-		$key     = $this->key($key);
-		$value   = (new Value($value, $minutes))->toJson();
-		$expires = $this->expiration($minutes);
-		return $this->connection->set($key, $value, $expires);
+		return $this->connection->set($this->key($key), (new Value($value, $minutes))->toJson(), $this->expiration($minutes));
 	}
 
 	/**
 	 * Internal method to retrieve the raw cache value;
 	 * needs to return a Value object or null if not found
+	 *
+	 * @param string $key
+	 * @return \Kirby\Cache\Value|null
 	 */
-	public function retrieve(string $key): Value|null
+	public function retrieve(string $key)
 	{
-		$value = $this->connection->get($this->key($key));
-		return Value::fromJson($value);
+		return Value::fromJson($this->connection->get($this->key($key)));
 	}
 
 	/**
 	 * Removes an item from the cache and returns
 	 * whether the operation was successful
+	 *
+	 * @param string $key
+	 * @return bool
 	 */
 	public function remove(string $key): bool
 	{
@@ -98,6 +89,8 @@ class MemCached extends Cache
 	 * Flushes the entire cache and returns
 	 * whether the operation was successful;
 	 * WARNING: Memcached only supports flushing the whole cache at once!
+	 *
+	 * @return bool
 	 */
 	public function flush(): bool
 	{