* php 7.x APCu cache support

TODO

@@ -6,6 +6,7 @@
 	* sandbox for plugins, don't install when requirements are not passed
 	* load items & weapons on install, preferably with ajax
 	* add changelog management interface
+	* option to require php extension to be installed
 
 1.0:
 	* i18n support (issue #1 on github)

config.php

@@ -56,7 +56,7 @@ $config = array(
 	'views_counter' => true,
 
 	// cache system. by default file cache is used
-	'cache_engine' => 'auto', // apc, eaccelerator, xcache, file, auto, or blank to disable.
+	'cache_engine' => 'auto', // apc, apcu, eaccelerator, xcache, file, auto, or blank to disable.
 	'cache_prefix' => 'myaac_', // have to be unique if running more MyAAC instances on the same server (except file system cache)
 
 	// database details (leave blank for auto detect from config.lua)

system/libs/cache.php

@@ -23,6 +23,11 @@ class Cache
 					self::$instance = new Cache_APC($prefix);
 					break;
 
+				case 'apcu':
+					require('cache_apcu.php');
+					self::$instance = new Cache_APCu($prefix);
+					break;
+
 				case 'eaccelerator':
 					require('cache_eaccelerator.php');
 					self::$instance = new Cache_eAccelerator($prefix);
@@ -55,6 +60,8 @@ class Cache
 	{
 		if(function_exists('apc_fetch'))
 			return 'apc';
+		else if(function_exists('apcu_fetch'))
+			return 'apcu';
 		else if(function_exists('eaccelerator_get'))
 			return 'eaccelerator';
 		else if(function_exists('xcache_get') && ini_get('xcache.var_size'))

system/libs/cache_apcu.php

@@ -0,0 +1,52 @@
+<?php
+/**
+ * Cache APC class
+ *
+ * @package   MyAAC
+ * @author    Slawkens <slawkens@gmail.com>
+ * @author    Mark Samman (Talaturen) <marksamman@gmail.com>
+ * @copyright 2017 MyAAC
+ * @link      http://my-aac.org
+ */
+defined('MYAAC') or die('Direct access not allowed!');
+
+class Cache_APCu
+{
+	private $prefix = '';
+	private $enabled;
+
+	public function __construct($prefix = '')
+	{
+		$this->prefix = $prefix;
+		$this->enabled = function_exists('apcu_fetch');
+	}
+
+	public function set($key, $var, $ttl = 0)
+	{
+		$key = $this->prefix . $key;
+		apcu_delete($key);
+		apcu_store($key, $var, $ttl);
+	}
+
+	public function get($key)
+	{
+		$tmp = '';
+		if($this->fetch($key, $tmp))
+			return $tmp;
+
+		return '';
+	}
+
+	public function fetch($key, &$var) {
+		return ($var = apcu_fetch($this->prefix . $key)) !== false;
+	}
+
+	public function delete($key) {
+		apcu_delete($key);
+	}
+
+	public function enabled() {
+		return $this->enabled;
+	}
+}
+?>