[FIXED] how to inject "memcache" to service.yml?

Issue

I installed memcache lib and added it to

framework:  
    session:
        handler_id: session.handler.memcache

but when I trying to use it I get this error

  [Symfony\Component\DependencyInjection\Exception\ServiceNotFoundException]  
  You have requested a non-existent service "session.handler.memcache".       

Solution

You want to use memcache or memcached? These are two different extensions, so be aware of that. And I suggest to use memcached, memcache is dead.

Serivce session.handler.memcache is not defined, so you have to define one implementing SessionHandlerInterface, in your case MemcacheSessionHandler.

First, we need to define memcache instance as a service, so we can pass it to MemcacheSessionHandler constructor:

memcache:
    class: \Memcache
calls:
    - [ addServer, [ %host_parameter%, %port_parameter% ]]

Then, your session handler:

session.handler.memcache:
        class: Symfony\Component\HttpFoundation\Session\Storage\Handler\MemcacheSessionHandler
        arguments: [@memcache]

You can also use a bundle like cache/adapter-bundle to register a PSR-6 compatible service (or even a symfony cache component, introduced in 3.1) and use Psr6SessionHandler.

If you want to use memcached, it's almost the same configuration-wise.

Answered By - Mateusz Sip

Answer Checked By - Timothy Miller (PHPFixing Admin)