2.14.3.9. Configure Memcache(d) in OpenCart

Memcache(d) configuration process differs in different OpenCart versions.

1. At the end of each of the two configuration files add this code:

   // CACHE
   define('CACHE_HOSTNAME', '/home/example/.system/memcache/socket');
   define('CACHE_PORT', '0');
   define('CACHE_PREFIX', 'oc_');

   In line with CACHE_HOSTNAME parameter, instead of example specify hosting account name where site is hosted.

2. In system/config directory, edit default.php file:
   • Find the following code block:

     // Cache
     $_['cache_engine'] = 'file'; // apc, file, mem or memcached
     $_['cache_expire'] = 3600;

   • In line with cache_engine parameter, replace file with memcached so that code block looks as follows:

     // Cache
     $_['cache_engine'] = 'memcached'; // apc, file, mem or memcached
     $_['cache_expire'] = 3600;

3. Check the site operation.

1. At the end of each of the two configuration files add this code:

   // CACHE
   define('CACHE_HOSTNAME', 'unix:///home/example/.system/memcache/socket');
   define('CACHE_PORT', '0');
   define('CACHE_PREFIX', 'oc_');

   In line with CACHE_HOSTNAME parameter, instead of example specify hosting account name where site is hosted.

2. In system/config directory, edit default.php file:
   • Find the following code block:

     // Cache
     $_['cache_type'] = 'file'; // apc, file or mem
     $_['cache_expire'] = 3600;

   • In line with cache_type parameter, replace file with mem so that code block looks as follows:

     // Cache
     $_['cache_type'] = 'mem'; // apc, file or mem
     $_['cache_expire'] = 3600;

3. Check the site operation.

1. At the end of each of the two configuration files add this code:

   // CACHE
   define('CACHE_HOSTNAME', 'unix:///home/example/.system/memcache/socket');
   define('CACHE_PORT', '0');
   define('CACHE_PREFIX', 'oc_');

   In line with CACHE_HOSTNAME parameter, instead of example specify hosting account name where site is hosted.

2. In site root directory and admin subdirectory, edit two index.php files:
   • Find the following code block:

     // Cache
     $cache = new Cache('file');
     $registry->set('cache', $cache);

   • In the line with $cache variable, replace file with mem so that code block looks as follows:

     // Cache
     $cache = new Cache('mem');
     $registry->set('cache', $cache);

3. Check the site operation.

1. At the end of each of the two configuration files add this code:

   define('CACHE_DRIVER', 'memcached');
   define('MEMCACHE_HOSTNAME', 'unix:///home/example/.system/memcache/socket');
   define('MEMCACHE_PORT', '0');
   define('MEMCACHE_NAMESPACE', 'opencart_test');

   In line with MEMCACHE_HOSTNAME parameter, instead of example specify hosting account name where site is hosted.

2. Replace all content of system/library/cache.php with the following:

   <?php
   final class Cache {
       private $expire;
       private $memcache;
       private $ismemcache = false;
       public function __construct($exp = 3600) {
           $this->expire = $exp;
           if (CACHE_DRIVER == 'memcached') {
               $mc = new Memcache;
               if ($mc->pconnect(MEMCACHE_HOSTNAME, MEMCACHE_PORT)) {
                   $this->memcache = $mc;
                   $this->ismemcache = true;
               };
           };
           $files = glob(DIR_CACHE . 'cache.*');
           if ($files) {
               foreach ($files as $file) {
                   $time = substr(strrchr($file, '.'), 1);
                   if ($time < time()) {
                       if (file_exists($file)) {
                           @unlink($file);
                       }
                   }
               }
           }
       }
       public function get($key) {
           if ((CACHE_DRIVER == 'memcached') && $this->ismemcache) {
               return($this->memcache->get(MEMCACHE_NAMESPACE . $key, 0));
           } else {
               $files = glob(DIR_CACHE . 'cache.' . $key . '.*');
               if ($files) {
                   foreach ($files as $file) {
                       $cache = '';
                       $handle = fopen($file, 'r');
                       if ($handle) {
                           $cache = fread($handle, filesize($file));
                           fclose($handle);
                       }
                       return unserialize($cache);
                   }
               }
           }
       }
       public function set($key, $value) {
           if ((CACHE_DRIVER == 'memcached') && $this->ismemcache) {
               $this->memcache->set(MEMCACHE_NAMESPACE . $key, $value, 0, $this->expire);
           } else {
               $this->delete($key);
               $file = DIR_CACHE . 'cache.' . $key . '.' . (time() + $this->expire);
               $handle = fopen($file, 'w');
               fwrite($handle, serialize($value));
               fclose($handle);
           };
       }
       public function delete($key) {
           if ((CACHE_DRIVER == 'memcached') && $this->ismemcache) {
               $this->memcache->delete(MEMCACHE_NAMESPACE . $key);
           } else {
               $files = glob(DIR_CACHE . 'cache.' . $key . '.*');
               if ($files) {
                   foreach ($files as $file) {
                       if (file_exists($file)) {
                           @unlink($file);
                           clearstatcache();
                       }
                   }
               }
           }
       }
   }
   ?>

3. Check the site operation.