[SOLVED] Enable Memcached on App Engine runtime PHP 7.2

Enable Memcached on App Engine runtime PHP 7.2

I'm trying since several days to enable session storage in memcache on Google App Engine, using the Symfony framework. Application starts well, Memcached instance exists, but I always end up with sessions that are not stored (CSRF on all forms, etc).

So I've created a very simple POC to check if Memcached is working, and it actually doesn't.

Here's the POC code:

app.yaml

runtime: php72

resources:
  cpu: 1
  memory_gb: 0.5
  disk_size_gb: 10

php.ini

extension=memcached.so

index.php

<?php

$test = new \Memcached;
var_dump( $test->add('test', '42') );
echo 'value of test is: ', $test->get('test');

Result of the following code is:

bool(false) value of test is:

Memcache looks pretty well integrated to App Engine, so I'm wondering why I can't hit it.

Debugging Memcached, the error is the following:

(0x75b27c3c040) NO SERVERS DEFINED -> libmemcached/initialize_query.cc:58

Any idea how to configure it properly?

Solution

Memcache is not supported in php72, you have to use php55 in case you need to access memcache