The memcache extension must be loaded for using this backend

Question

I got memcached installed. This is from phpinfo():

But when using it like this:

private static function getZendCacheMemcachedObject() {     $frontendOpts = array(         'caching' => true,         'lifetime' => 3600,         'automatic_serialization' => true     );      $backendOpts = array(         'servers' =>array(             array(             'host'   => 'localhost',             'port'   => 11211,             'weight' => 1             )         ),         'compression' => false     );      return Zend_Cache::factory('Core', 'Memcached', $frontendOpts, $backendOpts); }  public function foo($id) {     $cache = self::getZendCacheMemcachedObject();     $cacheKey = 'foo_'.$id;     $xml = $cache->load($cacheKey);      if (false === $xml) {         $xml = $this->httpClient->foo();         $cache->save($xml, $cacheKey);     }      return $xml; } 

I get this error:

The memcache extension must be loaded for using this backend 

Any ideas?

Answer 1

PHP has two Memcached libraries with confusing names :

• Memcache
• Memcached (notice the d)

Your code needs the first one. Just do a simple pecl uninstall memcached and then pecl install memcache, modify your php.ini to include the appropiate .so and it should work.

Answer 2

for the PHP library that you have installed, it looks like the easiest solution would be to use a different backend - if your zend framework version allows it:

Zend_Cache_Backend_Libmemcached (http://doczf.mikaelkael.fr/1.11/en/zend.cache.backends.html)

i assume that return Zend_Cache::factory('Core', 'Memcached', $frontendOpts, $backendOpts); turns into return Zend_Cache::factory('Core', 'Libmemcached', $frontendOpts, $backendOpts);