Initial

.gitignore

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+# COMPOSER
+/vendor
+composer.lock
+
+
+# MISC FILES
+.cache
+.DS_Store
+.idea
+.project
+.settings
+*.esproj
+*.sublime-workspace
+*.sublime-project
+*.tmproj
+*.tmproject
+.vscode/*
+!.vscode/settings.json
+!.vscode/tasks.json
+!.vscode/launch.json
+!.vscode/extensions.json
+config.codekit3
+prepros-6.config

README.md

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+# Yii2/Craft3 memcached enabler
+
+This yii-extension is a memcached drop in replacement for sessions and cache. 
+
+The file `Session` handler and the file `Cache` driver gets replaced in fortrabbit environments where Memcache is enabled - it requires the Memcache component on the Professional Stack.
+
+
+
+## Install
+
+Require the package:
+```
+composer require fortrabbit/yii-memcached
+```
+
+That's it.

composer.json

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+{
+  "name": "fortrabbit/yii-memcached",
+  "description": "Mutes deprecation logs in production",
+  "version": "1.0.0",
+  "type": "yii2-extension",
+
+  "keywords": ["yii2", "craftcms", "caching", "cache", "memcached", "memcache", "session"],
+  "license": "MIT",
+  "authors": [
+    {
+      "name": "Oliver Stark",
+      "homepage": "https://www.fortrabbit.com"
+    }
+  ],
+  "support": {
+    "email": "[email protected]",
+    "issues": "https://github.com/fortrabbit/yii-memcached/issues",
+    "source": "https://github.com/fortrabbit/yii-memcached",
+    "docs": "https://github.com/fortrabbit/yii-memcached"
+  },
+  "require": {
+    "craftcms/cms": "^3.0.0"
+  },
+  "autoload": {
+    "psr-4": {
+      "fortrabbit\\MemcachedEnabler\\": "src/"
+    },
+    "files": ["src/init.php"]
+
+  },
+  "extra": {
+    "bootstrap": "fortrabbit\\MemcachedEnabler\\Bootstrap"
+  }
+}

src/Bootstrap.php

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+<?php
+
+namespace fortrabbit\MemcachedEnabler;
+
+use yii\base\BootstrapInterface;
+use yii\base\InvalidConfigException;
+use yii\caching\MemCache;
+
+/**
+ * Class Bootstrap
+ *
+ * @author Oliver Stark <[email protected]>
+ * @since  1.0.0
+ */
+class Bootstrap implements BootstrapInterface
+{
+
+    /**
+     * Bootstrapper
+     *
+     * @param \yii\base\Application $app
+     */
+    public function bootstrap($app)
+    {
+
+        if (getenv('MEMCACHE_COUNT')) {
+
+            // Set cache component
+            try {
+                $app->set('cache', [
+                    'class'        => MemCache::class,
+                    'persistentId' => getenv('MEMCACHE_PERSISTENT') ? 'cache' : null,
+                    'servers'      => $this->getMemcachedServers(),
+                    'useMemcached' => true
+                ]);
+            } catch (InvalidConfigException $e) {
+                error_log('MemcachedEnabler: ' . $e->getMessage());
+            }
+        }
+    }
+
+
+    /**
+     * @return array
+     */
+    protected function getMemcachedServers(): array
+    {
+        $servers = [];
+
+        foreach (range(1, getenv('MEMCACHE_COUNT')) as $num) {
+            $servers[] = [
+                'host'          => getenv('MEMCACHE_HOST' . $num),
+                'port'          => getenv('MEMCACHE_PORT' . $num),
+                'retryInterval' => 2,
+                'status'        => true,
+                'timeout'       => 2,
+                'weight'        => 1,
+            ];
+        }
+
+        return $servers;
+    }
+}

src/init.php

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+<?php
+// Very early session handler init
+// This file is loaded via composer autoload.files
+
+if (getenv('MEMCACHE_COUNT')) {
+
+    $handlers = [];
+    foreach (range(1, getenv('MEMCACHE_COUNT')) as $num) {
+        $handlers[] = getenv('MEMCACHE_HOST' . $num) . ':' . getenv('MEMCACHE_PORT' . $num);
+    }
+
+    // session config
+    ini_set('session.save_handler', 'memcached');
+    ini_set('session.save_path', implode(',', $handlers));
+
+    if (getenv('MEMCACHE_COUNT') == 2) {
+        ini_set('memcached.sess_number_of_replicas', 1);
+        ini_set('memcached.sess_consistent_hash', 1);
+        ini_set('memcached.sess_binary', 1);
+    }
+}
+